Philadelphia City Weather Records (USW00013779)
Record envelope, standing records and threshold days for Philadelphia City (USW00013779), Pennsylvania, United States, with 123 years of record.
Key Facts for Philadelphia City
- Philadelphia City (USW00013779) is a weather station in Pennsylvania, United States at 39.95 latitude and -75.15 longitude, 8 m (26 ft) above sea level.
- The station reports from 1871 to 1993, 123 years of record.
- 1,464 records set at Philadelphia City still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Philadelphia City tied a daily record low maximum temperature of 22.8 C (73.0 F) on 19 July 1993.
About the Station
- Location: Pennsylvania, United States, 39.95 latitude, -75.15 longitude.
- Elevation: 8 m (26 ft).
- Period of record: 1871 to 1993, 123 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 23.3 C (73.9 F) | -20.6 C (-5.1 F) | n/a | n/a |
| Feb | 26.1 C (79.0 F) | -23.9 C (-11.0 F) | n/a | n/a |
| Mar | 30.0 C (86.0 F) | -14.4 C (6.1 F) | n/a | n/a |
| Apr | 35.6 C (96.1 F) | -10.0 C (14.0 F) | n/a | n/a |
| May | 36.7 C (98.1 F) | 1.7 C (35.1 F) | n/a | n/a |
| Jun | 38.9 C (102.0 F) | 7.8 C (46.0 F) | n/a | n/a |
| Jul | 40.0 C (104.0 F) | 12.2 C (54.0 F) | n/a | n/a |
| Aug | 41.1 C (106.0 F) | 10.0 C (50.0 F) | n/a | n/a |
| Sep | 38.9 C (102.0 F) | 4.4 C (39.9 F) | n/a | n/a |
| Oct | 34.4 C (93.9 F) | -1.7 C (28.9 F) | n/a | n/a |
| Nov | 28.9 C (84.0 F) | -13.3 C (8.1 F) | n/a | n/a |
| Dec | 23.3 C (73.9 F) | -20.6 C (-5.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1874 | 17 |
| 1875 | 37 |
| 1876 | 20 |
| 1877 | 9 |
| 1878 | 2 |
| 1879 | 22 |
| 1880 | 26 |
| 1881 | 31 |
| 1882 | 10 |
| 1883 | 15 |
| 1884 | 21 |
| 1885 | 22 |
| 1886 | 21 |
| 1887 | 9 |
| 1888 | 25 |
| 1889 | 11 |
| 1890 | 17 |
| 1891 | 18 |
| 1892 | 11 |
| 1893 | 18 |
| 1894 | 16 |
| 1895 | 31 |
| 1896 | 24 |
| 1897 | 6 |
| 1898 | 8 |
| 1899 | 15 |
| 1900 | 19 |
| 1901 | 12 |
| 1902 | 7 |
| 1903 | 17 |
| 1904 | 11 |
| 1905 | 5 |
| 1906 | 8 |
| 1907 | 16 |
| 1908 | 7 |
| 1909 | 7 |
| 1910 | 5 |
| 1911 | 7 |
| 1912 | 4 |
| 1913 | 19 |
| 1914 | 18 |
| 1915 | 10 |
| 1916 | 12 |
| 1917 | 13 |
| 1918 | 19 |
| 1919 | 15 |
| 1920 | 8 |
| 1921 | 9 |
| 1922 | 5 |
| 1923 | 14 |
| 1924 | 6 |
| 1925 | 26 |
| 1926 | 11 |
| 1927 | 11 |
| 1928 | 11 |
| 1929 | 19 |
| 1930 | 25 |
| 1931 | 3 |
| 1932 | 12 |
| 1933 | 19 |
| 1934 | 14 |
| 1935 | 15 |
| 1936 | 12 |
| 1937 | 3 |
| 1938 | 11 |
| 1939 | 5 |
| 1940 | 15 |
| 1941 | 10 |
| 1942 | 11 |
| 1943 | 9 |
| 1944 | 1 |
| 1945 | 17 |
| 1946 | 11 |
| 1947 | 20 |
| 1948 | 14 |
| 1949 | 9 |
| 1950 | 16 |
| 1951 | 9 |
| 1952 | 6 |
| 1953 | 17 |
| 1954 | 9 |
| 1955 | 8 |
| 1956 | 9 |
| 1957 | 11 |
| 1958 | 4 |
| 1959 | 15 |
| 1960 | 9 |
| 1961 | 8 |
| 1962 | 12 |
| 1963 | 14 |
| 1964 | 15 |
| 1974 | 14 |
| 1975 | 13 |
| 1976 | 17 |
| 1977 | 11 |
| 1978 | 4 |
| 1979 | 14 |
| 1980 | 4 |
| 1981 | 3 |
| 1982 | 19 |
| 1983 | 22 |
| 1984 | 23 |
| 1985 | 16 |
| 1986 | 11 |
| 1987 | 11 |
| 1988 | 10 |
| 1989 | 6 |
| 1990 | 23 |
| 1991 | 20 |
| 1992 | 7 |
| 1993 | 5 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1915-04-03 | Record daily snowfall | Record daily snowfall 48.3 cm (19.0 in) |
| 1918-08-07 | Record high maximum temperature | Record high maximum temperature 41.1 C (106.0 F) |
| 1934-02-09 | Record low minimum temperature | Record low minimum temperature -23.9 C (-11.0 F) |
| 1952-06-26 | Record high minimum temperature | Record high minimum temperature 28.9 C (84.0 F) |
Wettest Day of Each Month
Aug: 143.0 mm (5.6 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 63.2 mm (2.5 in) | 7 January 1874 |
| Feb | 98.0 mm (3.9 in) | 6 February 1896 |
| Mar | 70.9 mm (2.8 in) | 15 March 1912 |
| Apr | 84.6 mm (3.3 in) | 30 April 1947 |
| May | 80.3 mm (3.2 in) | 27 May 1918 |
| Jun | 83.8 mm (3.3 in) | 16 June 1906 |
| Jul | 89.2 mm (3.5 in) | 10 July 1950 |
| Aug | 143.0 mm (5.6 in) | 3 August 1898 |
| Sep | 118.1 mm (4.6 in) | 22 September 1882 |
| Oct | 69.3 mm (2.7 in) | 4 October 1877 |
| Nov | 110.0 mm (4.3 in) | 7 November 1977 |
| Dec | 94.2 mm (3.7 in) | 7 December 1914 |
Period of Record Coverage
1874 to 1993| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1874 | 365 | 100% | Yes |
| 1875 | 365 | 100% | Yes |
| 1876 | 366 | 100% | Yes |
| 1877 | 365 | 100% | Yes |
| 1878 | 365 | 100% | Yes |
| 1879 | 365 | 100% | Yes |
| 1880 | 366 | 100% | Yes |
| 1881 | 365 | 100% | Yes |
| 1882 | 365 | 100% | Yes |
| 1883 | 365 | 100% | Yes |
| 1884 | 366 | 100% | Yes |
| 1885 | 365 | 100% | Yes |
| 1886 | 365 | 100% | Yes |
| 1887 | 365 | 100% | Yes |
| 1888 | 366 | 100% | Yes |
| 1889 | 365 | 100% | Yes |
| 1890 | 365 | 100% | Yes |
| 1891 | 365 | 100% | Yes |
| 1892 | 366 | 100% | Yes |
| 1893 | 365 | 100% | Yes |
| 1894 | 365 | 100% | Yes |
| 1895 | 365 | 100% | Yes |
| 1896 | 366 | 100% | Yes |
| 1897 | 365 | 100% | Yes |
| 1898 | 365 | 100% | Yes |
| 1899 | 365 | 100% | Yes |
| 1900 | 365 | 100% | Yes |
| 1901 | 365 | 100% | Yes |
| 1902 | 365 | 100% | Yes |
| 1903 | 365 | 100% | Yes |
| 1904 | 366 | 100% | Yes |
| 1905 | 365 | 100% | Yes |
| 1906 | 365 | 100% | Yes |
| 1907 | 365 | 100% | Yes |
| 1908 | 366 | 100% | Yes |
| 1909 | 365 | 100% | Yes |
| 1910 | 365 | 100% | Yes |
| 1911 | 365 | 100% | Yes |
| 1912 | 366 | 100% | Yes |
| 1913 | 365 | 100% | Yes |
| 1914 | 365 | 100% | Yes |
| 1915 | 365 | 100% | Yes |
| 1916 | 366 | 100% | Yes |
| 1917 | 365 | 100% | Yes |
| 1918 | 365 | 100% | Yes |
| 1919 | 365 | 100% | Yes |
| 1920 | 366 | 100% | Yes |
| 1921 | 365 | 100% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 366 | 100% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 212 | 58% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 19 July 1993 | Philadelphia City, US | daily low max (Tie) | 22.8 C (73.0 F) | tie | 64 years | 7 of 100 (Routine) |
| 12 July 1993 | Philadelphia City, US | daily high min (Tie) | 25.0 C (77.0 F) | tie | 58 years | 6 of 100 (Routine) |
| 11 July 1993 | Philadelphia City, US | daily high min | 26.7 C (80.1 F) | 0.6 C (1.1 F) | 82 years | 36 of 100 (Notable) |
| 10 July 1993 | Philadelphia City, US | monthly high min (Tie) | 27.8 C (82.0 F) | tie | 116 years | 12 of 100 (Routine) |
| 8 July 1993 | Philadelphia City, US | daily high min | 27.2 C (81.0 F) | 1.1 C (2.0 F) | 7 years | 16 of 100 (Routine) |
| 19 June 1993 | Philadelphia City, US | daily high min (Tie) | 23.3 C (73.9 F) | tie | 36 years | 5 of 100 (Routine) |
| 15 March 1993 | Philadelphia City, US | daily low min | -9.4 C (15.1 F) | 1.6 C (2.9 F) | 92 years | 40 of 100 (Notable) |
| 14 March 1993 | Philadelphia City, US | daily low max | -3.3 C (26.1 F) | 2.7 C (4.9 F) | 100 years | 44 of 100 (Notable) |
| 5 January 1993 | Philadelphia City, US | daily high max (Tie) | 17.8 C (64.0 F) | tie | 43 years | 5 of 100 (Routine) |
| 31 December 1992 | Philadelphia City, US | daily high min | 8.3 C (46.9 F) | 0.5 C (0.9 F) | 107 years | 41 of 100 (Notable) |
| 30 December 1992 | Philadelphia City, US | daily high min | 7.8 C (46.0 F) | 1.1 C (2.0 F) | 65 years | 31 of 100 (Routine) |
| 30 September 1992 | Philadelphia City, US | daily low max | 12.8 C (55.0 F) | 0.5 C (0.9 F) | 103 years | 41 of 100 (Notable) |
| 16 August 1992 | Philadelphia City, US | daily low max | 19.4 C (66.9 F) | 0.6 C (1.1 F) | 108 years | 41 of 100 (Notable) |
| 15 August 1992 | Philadelphia City, US | daily low max | 19.4 C (66.9 F) | 1.2 C (2.2 F) | 13 years | 16 of 100 (Routine) |
| 24 July 1992 | Philadelphia City, US | daily low max | 19.4 C (66.9 F) | 1.2 C (2.2 F) | 88 years | 39 of 100 (Notable) |
| 22 June 1992 | Philadelphia City, US | daily low min | 11.1 C (52.0 F) | 1.1 C (2.0 F) | 110 years | 43 of 100 (Notable) |
| 23 May 1992 | Philadelphia City, US | daily high min (Tie) | 20.6 C (69.1 F) | tie | 28 years | 4 of 100 (Routine) |
| 24 April 1992 | Philadelphia City, US | daily high min (Tie) | 15.0 C (59.0 F) | tie | 82 years | 8 of 100 (Routine) |
| 22 April 1992 | Philadelphia City, US | daily high min (Tie) | 16.1 C (61.0 F) | tie | 69 years | 7 of 100 (Routine) |
| 8 March 1992 | Philadelphia City, US | daily high min (Tie) | 11.1 C (52.0 F) | tie | 12 years | 3 of 100 (Routine) |
Climate Trend
110 complete years, 1874 to 1992| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1874 | 11.7 C | -1.28 C |
| 1875 | 10.0 C | -2.90 C |
| 1876 | 11.5 C | -1.47 C |
| 1877 | 12.4 C | -0.56 C |
| 1878 | 12.7 C | -0.21 C |
| 1879 | 12.0 C | -0.92 C |
| 1880 | 12.7 C | -0.25 C |
| 1881 | 12.5 C | -0.45 C |
| 1882 | 12.7 C | -0.25 C |
| 1883 | 12.3 C | -0.68 C |
| 1884 | 12.3 C | -0.59 C |
| 1885 | 11.1 C | -1.86 C |
| 1886 | 12.1 C | -0.88 C |
| 1887 | 12.5 C | -0.42 C |
| 1888 | 11.6 C | -1.35 C |
| 1889 | 12.6 C | -0.30 C |
| 1890 | 12.7 C | -0.19 C |
| 1891 | 12.8 C | -0.18 C |
| 1892 | 11.9 C | -1.06 C |
| 1893 | 11.6 C | -1.36 C |
| 1894 | 12.8 C | -0.17 C |
| 1895 | 12.0 C | -0.95 C |
| 1896 | 12.5 C | -0.44 C |
| 1897 | 12.5 C | -0.39 C |
| 1898 | 13.1 C | +0.19 C |
| 1899 | 12.5 C | -0.46 C |
| 1900 | 13.4 C | +0.43 C |
| 1901 | 12.1 C | -0.84 C |
| 1902 | 12.4 C | -0.57 C |
| 1903 | 12.3 C | -0.61 C |
| 1904 | 11.0 C | -1.94 C |
| 1905 | 12.2 C | -0.75 C |
| 1906 | 13.0 C | +0.05 C |
| 1907 | 11.7 C | -1.23 C |
| 1908 | 13.1 C | +0.14 C |
| 1909 | 12.9 C | -0.07 C |
| 1910 | 12.8 C | -0.16 C |
| 1911 | 13.0 C | +0.09 C |
| 1912 | 12.3 C | -0.60 C |
| 1913 | 13.9 C | +0.95 C |
| 1914 | 12.4 C | -0.56 C |
| 1915 | 13.0 C | +0.05 C |
| 1916 | 12.4 C | -0.53 C |
| 1917 | 11.5 C | -1.40 C |
| 1918 | 12.7 C | -0.24 C |
| 1919 | 13.2 C | +0.26 C |
| 1920 | 12.4 C | -0.50 C |
| 1921 | 13.9 C | +1.00 C |
| 1922 | 13.2 C | +0.24 C |
| 1923 | 12.9 C | 0.00 C |
| 1924 | 12.1 C | -0.83 C |
| 1925 | 13.3 C | +0.36 C |
| 1926 | 12.0 C | -0.95 C |
| 1927 | 13.1 C | +0.15 C |
| 1928 | 13.0 C | +0.08 C |
| 1929 | 13.3 C | +0.32 C |
| 1930 | 13.8 C | +0.82 C |
| 1931 | 14.5 C | +1.57 C |
| 1932 | 13.9 C | +1.00 C |
| 1933 | 13.6 C | +0.65 C |
| 1934 | 12.8 C | -0.09 C |
| 1935 | 12.4 C | -0.49 C |
| 1936 | 12.7 C | -0.23 C |
| 1937 | 12.9 C | -0.01 C |
| 1938 | 13.3 C | +0.41 C |
| 1939 | 13.2 C | +0.28 C |
| 1940 | 11.7 C | -1.20 C |
| 1941 | 13.5 C | +0.53 C |
| 1942 | 13.1 C | +0.13 C |
| 1943 | 12.8 C | -0.13 C |
| 1944 | 13.1 C | +0.18 C |
| 1945 | 13.1 C | +0.14 C |
| 1946 | 13.8 C | +0.89 C |
| 1947 | 12.8 C | -0.10 C |
| 1948 | 12.9 C | -0.05 C |
| 1949 | 14.3 C | +1.41 C |
| 1950 | 12.7 C | -0.24 C |
| 1951 | 13.4 C | +0.51 C |
| 1952 | 13.7 C | +0.79 C |
| 1953 | 14.4 C | +1.50 C |
| 1954 | 13.5 C | +0.60 C |
| 1955 | 13.5 C | +0.53 C |
| 1956 | 12.9 C | -0.04 C |
| 1957 | 13.7 C | +0.79 C |
| 1958 | 12.2 C | -0.77 C |
| 1959 | 14.1 C | +1.20 C |
| 1960 | 13.2 C | +0.25 C |
| 1961 | 13.4 C | +0.51 C |
| 1962 | 12.7 C | -0.28 C |
| 1963 | 13.3 C | +0.32 C |
| 1964 | 13.8 C | +0.83 C |
| 1974 | 13.5 C | +0.55 C |
| 1975 | 14.0 C | +1.04 C |
| 1976 | 13.4 C | +0.44 C |
| 1977 | 13.4 C | +0.48 C |
| 1978 | 12.2 C | -0.70 C |
| 1979 | 13.0 C | +0.02 C |
| 1980 | 13.8 C | +0.88 C |
| 1981 | 13.6 C | +0.64 C |
| 1982 | 13.2 C | +0.22 C |
| 1983 | 14.5 C | +1.52 C |
| 1984 | 14.7 C | +1.77 C |
| 1985 | 14.3 C | +1.34 C |
| 1986 | 14.4 C | +1.48 C |
| 1987 | 14.0 C | +1.11 C |
| 1988 | 13.4 C | +0.45 C |
| 1989 | 13.2 C | +0.27 C |
| 1990 | 14.9 C | +1.94 C |
| 1991 | 14.7 C | +1.81 C |
| 1992 | 12.9 C | -0.05 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1874 to 1992. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 110 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1874 to 1992 | 110 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1874 to 1992 | 110 | Rise |
| Mean daily minimum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1874 to 1992 | 110 | Rise |
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1871 to 1993| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 1918 | 36.1 C (97.0 F) | 111 |
| Coldest night (TNn) | -23.9 C (-11.0 F) | 1934 | -13.9 C (7.0 F) | 111 |
| Wettest day (Rx1day) | 143.0 mm (5.6 in) | 1898 | 64.0 mm (2.5 in) | 91 |
| Wettest five days (Rx5day) | 257.6 mm (10.1 in) | 1882 | 90.4 mm (3.6 in) | 91 |
| Longest dry spell (CDD) | 37 days | 1924 | 18 days | 91 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1871 | n/a |
| 1872 | n/a |
| 1873 | n/a |
| 1874 | 36.1 C (97.0 F) |
| 1875 | 35.0 C (95.0 F) |
| 1876 | 37.8 C (100.0 F) |
| 1877 | 35.0 C (95.0 F) |
| 1878 | 36.1 C (97.0 F) |
| 1879 | 35.6 C (96.1 F) |
| 1880 | 35.6 C (96.1 F) |
| 1881 | 38.9 C (102.0 F) |
| 1882 | 35.0 C (95.0 F) |
| 1883 | 34.4 C (93.9 F) |
| 1884 | 35.0 C (95.0 F) |
| 1885 | 36.1 C (97.0 F) |
| 1886 | 34.4 C (93.9 F) |
| 1887 | 37.8 C (100.0 F) |
| 1888 | 36.7 C (98.1 F) |
| 1889 | 34.4 C (93.9 F) |
| 1890 | 36.1 C (97.0 F) |
| 1891 | 36.1 C (97.0 F) |
| 1892 | 38.3 C (100.9 F) |
| 1893 | 36.7 C (98.1 F) |
| 1894 | 36.1 C (97.0 F) |
| 1895 | 36.7 C (98.1 F) |
| 1896 | 36.1 C (97.0 F) |
| 1897 | 35.6 C (96.1 F) |
| 1898 | 37.8 C (100.0 F) |
| 1899 | 36.1 C (97.0 F) |
| 1900 | 38.3 C (100.9 F) |
| 1901 | 39.4 C (102.9 F) |
| 1902 | 35.0 C (95.0 F) |
| 1903 | 35.6 C (96.1 F) |
| 1904 | 35.6 C (96.1 F) |
| 1905 | 36.7 C (98.1 F) |
| 1906 | 35.6 C (96.1 F) |
| 1907 | 33.9 C (93.0 F) |
| 1908 | 36.1 C (97.0 F) |
| 1909 | 36.7 C (98.1 F) |
| 1910 | 35.0 C (95.0 F) |
| 1911 | 37.2 C (99.0 F) |
| 1912 | 35.0 C (95.0 F) |
| 1913 | 36.1 C (97.0 F) |
| 1914 | 35.6 C (96.1 F) |
| 1915 | 35.6 C (96.1 F) |
| 1916 | 36.1 C (97.0 F) |
| 1917 | 38.3 C (100.9 F) |
| 1918 | 41.1 C (106.0 F) |
| 1919 | 37.8 C (100.0 F) |
| 1920 | 35.0 C (95.0 F) |
| 1921 | 35.6 C (96.1 F) |
| 1922 | 34.4 C (93.9 F) |
| 1923 | 37.2 C (99.0 F) |
| 1924 | 35.6 C (96.1 F) |
| 1925 | 37.8 C (100.0 F) |
| 1926 | 37.8 C (100.0 F) |
| 1927 | 35.0 C (95.0 F) |
| 1928 | 35.0 C (95.0 F) |
| 1929 | 35.0 C (95.0 F) |
| 1930 | 39.4 C (102.9 F) |
| 1931 | 36.7 C (98.1 F) |
| 1932 | 36.1 C (97.0 F) |
| 1933 | 37.2 C (99.0 F) |
| 1934 | 38.9 C (102.0 F) |
| 1935 | 35.0 C (95.0 F) |
| 1936 | 40.0 C (104.0 F) |
| 1937 | 36.7 C (98.1 F) |
| 1938 | 35.0 C (95.0 F) |
| 1939 | 35.6 C (96.1 F) |
| 1940 | 37.2 C (99.0 F) |
| 1941 | 36.1 C (97.0 F) |
| 1942 | 36.7 C (98.1 F) |
| 1943 | 34.4 C (93.9 F) |
| 1944 | 36.1 C (97.0 F) |
| 1945 | 37.2 C (99.0 F) |
| 1946 | 35.0 C (95.0 F) |
| 1947 | 33.9 C (93.0 F) |
| 1948 | 38.3 C (100.9 F) |
| 1949 | 36.7 C (98.1 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 34.4 C (93.9 F) |
| 1952 | 36.7 C (98.1 F) |
| 1953 | 37.8 C (100.0 F) |
| 1954 | 37.2 C (99.0 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 34.4 C (93.9 F) |
| 1957 | 36.7 C (98.1 F) |
| 1958 | 32.8 C (91.0 F) |
| 1959 | 37.2 C (99.0 F) |
| 1960 | 34.4 C (93.9 F) |
| 1961 | 35.6 C (96.1 F) |
| 1962 | 36.7 C (98.1 F) |
| 1963 | 38.3 C (100.9 F) |
| 1964 | 37.2 C (99.0 F) |
| 1974 | 33.9 C (93.0 F) |
| 1975 | 36.1 C (97.0 F) |
| 1976 | 35.6 C (96.1 F) |
| 1977 | 37.2 C (99.0 F) |
| 1978 | 35.6 C (96.1 F) |
| 1979 | 34.4 C (93.9 F) |
| 1980 | 37.2 C (99.0 F) |
| 1981 | 35.6 C (96.1 F) |
| 1982 | 34.4 C (93.9 F) |
| 1983 | 38.9 C (102.0 F) |
| 1984 | 37.2 C (99.0 F) |
| 1985 | 35.0 C (95.0 F) |
| 1986 | 36.7 C (98.1 F) |
| 1987 | 36.7 C (98.1 F) |
| 1988 | 36.7 C (98.1 F) |
| 1989 | 35.0 C (95.0 F) |
| 1990 | 35.6 C (96.1 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 35.0 C (95.0 F) |
| 1993 | 36.1 C (97.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1871 | n/a |
| 1872 | n/a |
| 1873 | n/a |
| 1874 | -12.2 C (10.0 F) |
| 1875 | -20.6 C (-5.1 F) |
| 1876 | -15.6 C (3.9 F) |
| 1877 | -13.3 C (8.1 F) |
| 1878 | -11.1 C (12.0 F) |
| 1879 | -19.4 C (-2.9 F) |
| 1880 | -20.6 C (-5.1 F) |
| 1881 | -18.3 C (-0.9 F) |
| 1882 | -17.8 C (0.0 F) |
| 1883 | -12.8 C (9.0 F) |
| 1884 | -17.2 C (1.0 F) |
| 1885 | -17.8 C (0.0 F) |
| 1886 | -18.9 C (-2.0 F) |
| 1887 | -13.3 C (8.1 F) |
| 1888 | -16.7 C (1.9 F) |
| 1889 | -16.7 C (1.9 F) |
| 1890 | -12.8 C (9.0 F) |
| 1891 | -11.1 C (12.0 F) |
| 1892 | -12.2 C (10.0 F) |
| 1893 | -17.8 C (0.0 F) |
| 1894 | -15.6 C (3.9 F) |
| 1895 | -19.4 C (-2.9 F) |
| 1896 | -18.9 C (-2.0 F) |
| 1897 | -13.9 C (7.0 F) |
| 1898 | -13.3 C (8.1 F) |
| 1899 | -21.1 C (-6.0 F) |
| 1900 | -14.4 C (6.1 F) |
| 1901 | -13.3 C (8.1 F) |
| 1902 | -11.1 C (12.0 F) |
| 1903 | -16.1 C (3.0 F) |
| 1904 | -18.9 C (-2.0 F) |
| 1905 | -14.4 C (6.1 F) |
| 1906 | -13.3 C (8.1 F) |
| 1907 | -14.4 C (6.1 F) |
| 1908 | -15.0 C (5.0 F) |
| 1909 | -12.8 C (9.0 F) |
| 1910 | -15.0 C (5.0 F) |
| 1911 | -8.3 C (17.1 F) |
| 1912 | -17.8 C (0.0 F) |
| 1913 | -10.0 C (14.0 F) |
| 1914 | -17.8 C (0.0 F) |
| 1915 | -10.0 C (14.0 F) |
| 1916 | -15.0 C (5.0 F) |
| 1917 | -20.0 C (-4.0 F) |
| 1918 | -18.9 C (-2.0 F) |
| 1919 | -15.6 C (3.9 F) |
| 1920 | -16.7 C (1.9 F) |
| 1921 | -13.9 C (7.0 F) |
| 1922 | -15.6 C (3.9 F) |
| 1923 | -12.2 C (10.0 F) |
| 1924 | -14.4 C (6.1 F) |
| 1925 | -16.1 C (3.0 F) |
| 1926 | -13.9 C (7.0 F) |
| 1927 | -15.6 C (3.9 F) |
| 1928 | -11.7 C (10.9 F) |
| 1929 | -12.8 C (9.0 F) |
| 1930 | -13.3 C (8.1 F) |
| 1931 | -8.9 C (16.0 F) |
| 1932 | -9.4 C (15.1 F) |
| 1933 | -16.1 C (3.0 F) |
| 1934 | -23.9 C (-11.0 F) |
| 1935 | -16.1 C (3.0 F) |
| 1936 | -18.9 C (-2.0 F) |
| 1937 | -7.8 C (18.0 F) |
| 1938 | -11.7 C (10.9 F) |
| 1939 | -11.1 C (12.0 F) |
| 1940 | -15.0 C (5.0 F) |
| 1941 | -9.4 C (15.1 F) |
| 1942 | -16.7 C (1.9 F) |
| 1943 | -16.1 C (3.0 F) |
| 1944 | -10.6 C (12.9 F) |
| 1945 | -16.1 C (3.0 F) |
| 1946 | -11.7 C (10.9 F) |
| 1947 | -14.4 C (6.1 F) |
| 1948 | -14.4 C (6.1 F) |
| 1949 | -7.2 C (19.0 F) |
| 1950 | -12.2 C (10.0 F) |
| 1951 | -12.2 C (10.0 F) |
| 1952 | -12.8 C (9.0 F) |
| 1953 | -7.8 C (18.0 F) |
| 1954 | -10.6 C (12.9 F) |
| 1955 | -14.4 C (6.1 F) |
| 1956 | -7.8 C (18.0 F) |
| 1957 | -13.3 C (8.1 F) |
| 1958 | -14.4 C (6.1 F) |
| 1959 | -11.1 C (12.0 F) |
| 1960 | -12.8 C (9.0 F) |
| 1961 | -17.8 C (0.0 F) |
| 1962 | -15.6 C (3.9 F) |
| 1963 | -16.1 C (3.0 F) |
| 1964 | -12.2 C (10.0 F) |
| 1974 | -10.0 C (14.0 F) |
| 1975 | -8.9 C (16.0 F) |
| 1976 | -13.3 C (8.1 F) |
| 1977 | -17.8 C (0.0 F) |
| 1978 | -11.7 C (10.9 F) |
| 1979 | -17.2 C (1.0 F) |
| 1980 | -12.2 C (10.0 F) |
| 1981 | -13.9 C (7.0 F) |
| 1982 | -20.0 C (-4.0 F) |
| 1983 | -15.6 C (3.9 F) |
| 1984 | -12.2 C (10.0 F) |
| 1985 | -19.4 C (-2.9 F) |
| 1986 | -10.6 C (12.9 F) |
| 1987 | -12.2 C (10.0 F) |
| 1988 | -12.8 C (9.0 F) |
| 1989 | -13.9 C (7.0 F) |
| 1990 | -11.7 C (10.9 F) |
| 1991 | -11.1 C (12.0 F) |
| 1992 | -10.6 C (12.9 F) |
| 1993 | -12.8 C (9.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1871 | 33.0 mm (1.3 in) |
| 1872 | 53.6 mm (2.1 in) |
| 1873 | 132.3 mm (5.2 in) |
| 1874 | 65.0 mm (2.6 in) |
| 1875 | 49.5 mm (1.9 in) |
| 1876 | 88.4 mm (3.5 in) |
| 1877 | 69.3 mm (2.7 in) |
| 1878 | 49.0 mm (1.9 in) |
| 1879 | 58.9 mm (2.3 in) |
| 1880 | 49.0 mm (1.9 in) |
| 1881 | 41.7 mm (1.6 in) |
| 1882 | 118.1 mm (4.6 in) |
| 1883 | 72.6 mm (2.9 in) |
| 1884 | 63.0 mm (2.5 in) |
| 1885 | 63.5 mm (2.5 in) |
| 1886 | 44.2 mm (1.7 in) |
| 1887 | 69.9 mm (2.8 in) |
| 1888 | 56.6 mm (2.2 in) |
| 1889 | 76.2 mm (3.0 in) |
| 1890 | 29.5 mm (1.2 in) |
| 1891 | 40.9 mm (1.6 in) |
| 1892 | 50.8 mm (2.0 in) |
| 1893 | 49.5 mm (1.9 in) |
| 1894 | 74.7 mm (2.9 in) |
| 1895 | 55.4 mm (2.2 in) |
| 1896 | 98.0 mm (3.9 in) |
| 1897 | 51.3 mm (2.0 in) |
| 1898 | 143.0 mm (5.6 in) |
| 1899 | 52.1 mm (2.1 in) |
| 1900 | 96.3 mm (3.8 in) |
| 1901 | 71.1 mm (2.8 in) |
| 1902 | 52.3 mm (2.1 in) |
| 1903 | 52.8 mm (2.1 in) |
| 1904 | 74.4 mm (2.9 in) |
| 1905 | 69.6 mm (2.7 in) |
| 1906 | 83.8 mm (3.3 in) |
| 1907 | 54.4 mm (2.1 in) |
| 1908 | 68.3 mm (2.7 in) |
| 1909 | 56.4 mm (2.2 in) |
| 1910 | 51.6 mm (2.0 in) |
| 1911 | 86.6 mm (3.4 in) |
| 1912 | 70.9 mm (2.8 in) |
| 1913 | 44.7 mm (1.8 in) |
| 1914 | 94.2 mm (3.7 in) |
| 1915 | 74.2 mm (2.9 in) |
| 1916 | 44.7 mm (1.8 in) |
| 1917 | 65.3 mm (2.6 in) |
| 1918 | 80.3 mm (3.2 in) |
| 1919 | 80.3 mm (3.2 in) |
| 1920 | 58.7 mm (2.3 in) |
| 1921 | 94.0 mm (3.7 in) |
| 1922 | 32.5 mm (1.3 in) |
| 1923 | 55.6 mm (2.2 in) |
| 1924 | 54.9 mm (2.2 in) |
| 1925 | 44.5 mm (1.8 in) |
| 1926 | 75.2 mm (3.0 in) |
| 1927 | 53.6 mm (2.1 in) |
| 1928 | 70.1 mm (2.8 in) |
| 1929 | 74.7 mm (2.9 in) |
| 1930 | 70.4 mm (2.8 in) |
| 1931 | 75.9 mm (3.0 in) |
| 1932 | 52.3 mm (2.1 in) |
| 1933 | 95.0 mm (3.7 in) |
| 1934 | 38.4 mm (1.5 in) |
| 1935 | 82.6 mm (3.3 in) |
| 1936 | 46.2 mm (1.8 in) |
| 1937 | 38.4 mm (1.5 in) |
| 1938 | 83.1 mm (3.3 in) |
| 1939 | 94.7 mm (3.7 in) |
| 1940 | 81.0 mm (3.2 in) |
| 1941 | 77.0 mm (3.0 in) |
| 1942 | 74.9 mm (2.9 in) |
| 1943 | n/a |
| 1944 | 78.7 mm (3.1 in) |
| 1945 | 72.1 mm (2.8 in) |
| 1946 | 54.9 mm (2.2 in) |
| 1947 | 84.6 mm (3.3 in) |
| 1948 | 53.3 mm (2.1 in) |
| 1949 | 46.5 mm (1.8 in) |
| 1950 | 97.8 mm (3.9 in) |
| 1951 | 55.1 mm (2.2 in) |
| 1952 | 71.4 mm (2.8 in) |
| 1953 | 57.4 mm (2.3 in) |
| 1954 | 52.6 mm (2.1 in) |
| 1955 | 77.2 mm (3.0 in) |
| 1956 | 41.9 mm (1.6 in) |
| 1957 | 33.3 mm (1.3 in) |
| 1958 | n/a |
| 1959 | n/a |
| 1960 | n/a |
| 1961 | n/a |
| 1962 | n/a |
| 1963 | n/a |
| 1964 | n/a |
| 1974 | 48.0 mm (1.9 in) |
| 1975 | 64.0 mm (2.5 in) |
| 1976 | 57.7 mm (2.3 in) |
| 1977 | 124.0 mm (4.9 in) |
| 1978 | 69.3 mm (2.7 in) |
| 1979 | n/a |
| 1980 | n/a |
| 1981 | n/a |
| 1982 | n/a |
| 1983 | n/a |
| 1984 | n/a |
| 1985 | n/a |
| 1986 | n/a |
| 1987 | n/a |
| 1988 | n/a |
| 1989 | n/a |
| 1990 | n/a |
| 1991 | n/a |
| 1992 | n/a |
| 1993 | n/a |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1871 | 45.2 mm (1.8 in) |
| 1872 | 118.8 mm (4.7 in) |
| 1873 | 174.2 mm (6.9 in) |
| 1874 | 137.3 mm (5.4 in) |
| 1875 | 75.7 mm (3.0 in) |
| 1876 | 123.7 mm (4.9 in) |
| 1877 | 76.5 mm (3.0 in) |
| 1878 | 92.5 mm (3.6 in) |
| 1879 | 150.1 mm (5.9 in) |
| 1880 | 91.9 mm (3.6 in) |
| 1881 | 52.4 mm (2.1 in) |
| 1882 | 257.6 mm (10.1 in) |
| 1883 | 75.6 mm (3.0 in) |
| 1884 | 83.8 mm (3.3 in) |
| 1885 | 108.5 mm (4.3 in) |
| 1886 | 66.1 mm (2.6 in) |
| 1887 | 116.8 mm (4.6 in) |
| 1888 | 69.9 mm (2.8 in) |
| 1889 | 116.5 mm (4.6 in) |
| 1890 | 58.2 mm (2.3 in) |
| 1891 | 72.6 mm (2.9 in) |
| 1892 | 76.2 mm (3.0 in) |
| 1893 | 66.6 mm (2.6 in) |
| 1894 | 157.6 mm (6.2 in) |
| 1895 | 83.6 mm (3.3 in) |
| 1896 | 108.4 mm (4.3 in) |
| 1897 | 79.5 mm (3.1 in) |
| 1898 | 171.2 mm (6.7 in) |
| 1899 | 87.9 mm (3.5 in) |
| 1900 | 98.3 mm (3.9 in) |
| 1901 | 144.5 mm (5.7 in) |
| 1902 | 89.1 mm (3.5 in) |
| 1903 | 83.6 mm (3.3 in) |
| 1904 | 164.3 mm (6.5 in) |
| 1905 | 118.1 mm (4.6 in) |
| 1906 | 145.3 mm (5.7 in) |
| 1907 | 76.0 mm (3.0 in) |
| 1908 | 85.9 mm (3.4 in) |
| 1909 | 71.7 mm (2.8 in) |
| 1910 | 85.3 mm (3.4 in) |
| 1911 | 204.7 mm (8.1 in) |
| 1912 | 138.6 mm (5.5 in) |
| 1913 | 85.8 mm (3.4 in) |
| 1914 | 126.7 mm (5.0 in) |
| 1915 | 111.6 mm (4.4 in) |
| 1916 | 71.4 mm (2.8 in) |
| 1917 | 93.0 mm (3.7 in) |
| 1918 | 87.9 mm (3.5 in) |
| 1919 | 135.1 mm (5.3 in) |
| 1920 | 90.4 mm (3.6 in) |
| 1921 | 115.1 mm (4.5 in) |
| 1922 | 69.5 mm (2.7 in) |
| 1923 | 75.1 mm (3.0 in) |
| 1924 | 69.5 mm (2.7 in) |
| 1925 | 53.5 mm (2.1 in) |
| 1926 | 101.8 mm (4.0 in) |
| 1927 | 67.1 mm (2.6 in) |
| 1928 | 74.4 mm (2.9 in) |
| 1929 | 109.5 mm (4.3 in) |
| 1930 | 72.2 mm (2.8 in) |
| 1931 | 127.2 mm (5.0 in) |
| 1932 | 87.9 mm (3.5 in) |
| 1933 | 143.8 mm (5.7 in) |
| 1934 | 89.6 mm (3.5 in) |
| 1935 | 203.2 mm (8.0 in) |
| 1936 | 65.0 mm (2.6 in) |
| 1937 | 67.3 mm (2.6 in) |
| 1938 | 166.9 mm (6.6 in) |
| 1939 | 104.0 mm (4.1 in) |
| 1940 | 114.0 mm (4.5 in) |
| 1941 | 85.9 mm (3.4 in) |
| 1942 | 120.7 mm (4.8 in) |
| 1943 | n/a |
| 1944 | 146.3 mm (5.8 in) |
| 1945 | 94.5 mm (3.7 in) |
| 1946 | 120.7 mm (4.8 in) |
| 1947 | 124.2 mm (4.9 in) |
| 1948 | 82.4 mm (3.2 in) |
| 1949 | 93.2 mm (3.7 in) |
| 1950 | 101.4 mm (4.0 in) |
| 1951 | 82.8 mm (3.3 in) |
| 1952 | 112.5 mm (4.4 in) |
| 1953 | 80.8 mm (3.2 in) |
| 1954 | 67.5 mm (2.7 in) |
| 1955 | 100.1 mm (3.9 in) |
| 1956 | 90.4 mm (3.6 in) |
| 1957 | 57.9 mm (2.3 in) |
| 1958 | n/a |
| 1959 | n/a |
| 1960 | n/a |
| 1961 | n/a |
| 1962 | n/a |
| 1963 | n/a |
| 1964 | n/a |
| 1974 | 65.5 mm (2.6 in) |
| 1975 | 165.9 mm (6.5 in) |
| 1976 | 60.2 mm (2.4 in) |
| 1977 | 129.1 mm (5.1 in) |
| 1978 | 90.4 mm (3.6 in) |
| 1979 | n/a |
| 1980 | n/a |
| 1981 | n/a |
| 1982 | n/a |
| 1983 | n/a |
| 1984 | n/a |
| 1985 | n/a |
| 1986 | n/a |
| 1987 | n/a |
| 1988 | n/a |
| 1989 | n/a |
| 1990 | n/a |
| 1991 | n/a |
| 1992 | n/a |
| 1993 | n/a |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1871 | 9 days |
| 1872 | 14 days |
| 1873 | 18 days |
| 1874 | 29 days |
| 1875 | 16 days |
| 1876 | 15 days |
| 1877 | 23 days |
| 1878 | 15 days |
| 1879 | 26 days |
| 1880 | 21 days |
| 1881 | 19 days |
| 1882 | 14 days |
| 1883 | 13 days |
| 1884 | 22 days |
| 1885 | 16 days |
| 1886 | 32 days |
| 1887 | 18 days |
| 1888 | 15 days |
| 1889 | 16 days |
| 1890 | 15 days |
| 1891 | 20 days |
| 1892 | 19 days |
| 1893 | 13 days |
| 1894 | 18 days |
| 1895 | 17 days |
| 1896 | 22 days |
| 1897 | 17 days |
| 1898 | 17 days |
| 1899 | 21 days |
| 1900 | 16 days |
| 1901 | 27 days |
| 1902 | 23 days |
| 1903 | 17 days |
| 1904 | 18 days |
| 1905 | 16 days |
| 1906 | 18 days |
| 1907 | 15 days |
| 1908 | 21 days |
| 1909 | 20 days |
| 1910 | 30 days |
| 1911 | 13 days |
| 1912 | 26 days |
| 1913 | 16 days |
| 1914 | 21 days |
| 1915 | 14 days |
| 1916 | 14 days |
| 1917 | 22 days |
| 1918 | 16 days |
| 1919 | 11 days |
| 1920 | 14 days |
| 1921 | 15 days |
| 1922 | 17 days |
| 1923 | 25 days |
| 1924 | 37 days |
| 1925 | 17 days |
| 1926 | 14 days |
| 1927 | 17 days |
| 1928 | 18 days |
| 1929 | 13 days |
| 1930 | 21 days |
| 1931 | 20 days |
| 1932 | 13 days |
| 1933 | 15 days |
| 1934 | 17 days |
| 1935 | 21 days |
| 1936 | 16 days |
| 1937 | 14 days |
| 1938 | 15 days |
| 1939 | 18 days |
| 1940 | 15 days |
| 1941 | 29 days |
| 1942 | 20 days |
| 1943 | n/a |
| 1944 | 18 days |
| 1945 | 16 days |
| 1946 | 18 days |
| 1947 | 32 days |
| 1948 | 11 days |
| 1949 | 21 days |
| 1950 | 15 days |
| 1951 | 17 days |
| 1952 | 29 days |
| 1953 | 21 days |
| 1954 | 26 days |
| 1955 | 22 days |
| 1956 | 13 days |
| 1957 | 24 days |
| 1958 | n/a |
| 1959 | n/a |
| 1960 | n/a |
| 1961 | n/a |
| 1962 | n/a |
| 1963 | n/a |
| 1964 | n/a |
| 1974 | 19 days |
| 1975 | 22 days |
| 1976 | 27 days |
| 1977 | 18 days |
| 1978 | 16 days |
| 1979 | n/a |
| 1980 | n/a |
| 1981 | n/a |
| 1982 | n/a |
| 1983 | n/a |
| 1984 | n/a |
| 1985 | n/a |
| 1986 | n/a |
| 1987 | n/a |
| 1988 | n/a |
| 1989 | n/a |
| 1990 | n/a |
| 1991 | n/a |
| 1992 | n/a |
| 1993 | n/a |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
110 years with a frostAcross 110 years with a frost, the median last spring frost at Philadelphia City falls on 5 April and the median first autumn frost on 16 November, which leaves a median of 228 days between them.
In 1954 to 1992 the median growing season was 236 days. That is 19 days more than in 1874 to 1903.
Fitted over all years, the growing season changes by +2.4 days per decade at this station.
| Measure | Median, all years | Earliest period (1874 to 1903) | Recent period (1954 to 1992) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 5 April | 8 April | 30 March | 9 days earlier | -1.1 days per decade |
| First autumn frost | 16 November | 12 November | 20 November | 8 days later | +1.3 days per decade |
| Growing days | 228 days | 217 days | 236 days | 19 days more | +2.4 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
87 years, 1872 to 1977A day with at least 63.2 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 136.1 mm (5.4 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 63.2 mm (2.5 in) | |
| 5 years | 82.2 mm (3.2 in) | |
| 10 years | 94.9 mm (3.7 in) | |
| 25 years | 111.3 mm (4.4 in) | |
| 50 years | 123.7 mm (4.9 in) | |
| 100 years | 136.1 mm (5.4 in) | Longer than the 87 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 87 years of values from 1872 to 1977.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 143.0 mm (5.6 in) in 1898; 132.3 mm (5.2 in) in 1873; 124.0 mm (4.9 in) in 1977.
Station Changes
3 suspected3 changes were suspected in the annual mean temperature of Philadelphia City, at 1935, 1943 and 1959. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1935 ran 0.4 C (0.7 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1943 ran 0.2 C (0.3 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1959 ran 0.3 C (0.5 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1935 | -0.4 | -0.7 | likely | 5 |
| 1943 | +0.2 | +0.3 | likely | 5 |
| 1959 | +0.3 | +0.5 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).