Johnstown Weather Records (USC00364385)
Record envelope, standing records and threshold days for Johnstown (USC00364385), Pennsylvania, United States, with 102 years of record.
Key Facts for Johnstown
- Johnstown (USC00364385) is a weather station in Pennsylvania, United States at 40.33 latitude and -78.92 longitude, 370 m (1,214 ft) above sea level.
- The station reports from 1892 to 1993, 102 years of record.
- 1,464 records set at Johnstown still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Johnstown set a daily record precipitation of 38.9 mm (1.5 in) on 9 June 1993.
About the Station
- Location: Pennsylvania, United States, 40.33 latitude, -78.92 longitude.
- Elevation: 370 m (1,214 ft).
- Period of record: 1892 to 1993, 102 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 | 26.7 C (80.1 F) | -27.8 C (-18.0 F) | n/a | n/a |
| Feb | 25.0 C (77.0 F) | -27.2 C (-17.0 F) | n/a | n/a |
| Mar | 30.0 C (86.0 F) | -18.9 C (-2.0 F) | n/a | n/a |
| Apr | 35.0 C (95.0 F) | -12.8 C (9.0 F) | n/a | n/a |
| May | 37.2 C (99.0 F) | -3.3 C (26.1 F) | n/a | n/a |
| Jun | 38.9 C (102.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Jul | 40.0 C (104.0 F) | 3.9 C (39.0 F) | n/a | n/a |
| Aug | 39.4 C (102.9 F) | 1.7 C (35.1 F) | n/a | n/a |
| Sep | 40.0 C (104.0 F) | -3.9 C (25.0 F) | n/a | n/a |
| Oct | 34.4 C (93.9 F) | -7.2 C (19.0 F) | n/a | n/a |
| Nov | 28.3 C (82.9 F) | -17.2 C (1.0 F) | n/a | n/a |
| Dec | 24.4 C (75.9 F) | -26.1 C (-15.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1894 | 23 |
| 1895 | 10 |
| 1896 | 14 |
| 1897 | 7 |
| 1898 | 10 |
| 1899 | 20 |
| 1900 | 20 |
| 1901 | 17 |
| 1902 | 10 |
| 1903 | 10 |
| 1904 | 11 |
| 1905 | 9 |
| 1906 | 11 |
| 1907 | 16 |
| 1908 | 11 |
| 1909 | 8 |
| 1910 | 6 |
| 1911 | 23 |
| 1912 | 9 |
| 1913 | 11 |
| 1914 | 26 |
| 1915 | 12 |
| 1916 | 11 |
| 1917 | 21 |
| 1918 | 29 |
| 1919 | 12 |
| 1920 | 9 |
| 1921 | 9 |
| 1922 | 13 |
| 1923 | 21 |
| 1924 | 11 |
| 1925 | 33 |
| 1926 | 18 |
| 1927 | 15 |
| 1928 | 8 |
| 1929 | 20 |
| 1930 | 32 |
| 1931 | 10 |
| 1932 | 22 |
| 1933 | 22 |
| 1934 | 12 |
| 1935 | 13 |
| 1936 | 17 |
| 1937 | 7 |
| 1938 | 9 |
| 1939 | 12 |
| 1940 | 28 |
| 1941 | 16 |
| 1942 | 16 |
| 1943 | 27 |
| 1944 | 15 |
| 1945 | 15 |
| 1946 | 12 |
| 1947 | 14 |
| 1948 | 11 |
| 1949 | 21 |
| 1950 | 21 |
| 1951 | 15 |
| 1952 | 19 |
| 1953 | 10 |
| 1954 | 14 |
| 1955 | 15 |
| 1956 | 23 |
| 1957 | 22 |
| 1958 | 11 |
| 1959 | 11 |
| 1960 | 15 |
| 1961 | 9 |
| 1962 | 13 |
| 1963 | 25 |
| 1964 | 12 |
| 1965 | 13 |
| 1966 | 14 |
| 1967 | 12 |
| 1968 | 15 |
| 1969 | 10 |
| 1970 | 14 |
| 1971 | 5 |
| 1972 | 19 |
| 1973 | 6 |
| 1974 | 15 |
| 1975 | 7 |
| 1976 | 18 |
| 1977 | 28 |
| 1978 | 15 |
| 1979 | 14 |
| 1980 | 11 |
| 1981 | 7 |
| 1982 | 14 |
| 1983 | 17 |
| 1984 | 12 |
| 1985 | 10 |
| 1986 | 14 |
| 1987 | 7 |
| 1988 | 16 |
| 1989 | 15 |
| 1990 | 16 |
| 1991 | 17 |
| 1992 | 10 |
| 1993 | 3 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1935-07-25 | Record high minimum temperature | Record high minimum temperature 25.6 C (78.1 F) |
| 1936-07-09 | Record high maximum temperature | Record high maximum temperature 40.0 C (104.0 F) |
| 1949-06-26 | Record high minimum temperature | Record high minimum temperature 26.7 C (80.1 F) |
| 1977-07-20 | Record daily precipitation | Record daily precipitation 222.3 mm (8.8 in) |
| 1978-01-22 | Record daily snowfall | Record daily snowfall 47.5 cm (18.7 in) |
Wettest Day of Each Month
Jul: 222.3 mm (8.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 48.3 mm (1.9 in) | 3 January 1913 |
| Feb | 54.4 mm (2.1 in) | 11 February 1983 |
| Mar | 71.9 mm (2.8 in) | 21 March 1912 |
| Apr | 83.8 mm (3.3 in) | 9 April 1942 |
| May | 76.2 mm (3.0 in) | 19 May 1966 |
| Jun | 113.3 mm (4.5 in) | 16 June 1912 |
| Jul | 222.3 mm (8.8 in) | 20 July 1977 |
| Aug | 82.0 mm (3.2 in) | 2 August 1946 |
| Sep | 69.1 mm (2.7 in) | 11 September 1905 |
| Oct | 92.7 mm (3.6 in) | 16 October 1954 |
| Nov | 68.6 mm (2.7 in) | 22 November 1952 |
| Dec | 53.3 mm (2.1 in) | 2 December 1974 |
Period of Record Coverage
1894 to 1993| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1894 | 354 | 97% | Yes |
| 1895 | 121 | 33% | No |
| 1896 | 210 | 57% | No |
| 1897 | 333 | 91% | Yes |
| 1898 | 365 | 100% | Yes |
| 1899 | 363 | 99% | Yes |
| 1900 | 364 | 100% | Yes |
| 1901 | 356 | 98% | Yes |
| 1902 | 364 | 100% | Yes |
| 1903 | 363 | 99% | Yes |
| 1904 | 364 | 99% | Yes |
| 1905 | 212 | 58% | No |
| 1906 | 362 | 99% | Yes |
| 1907 | 360 | 99% | Yes |
| 1908 | 365 | 100% | Yes |
| 1909 | 242 | 66% | No |
| 1910 | 243 | 67% | No |
| 1911 | 364 | 100% | Yes |
| 1912 | 363 | 99% | Yes |
| 1913 | 365 | 100% | Yes |
| 1914 | 365 | 100% | Yes |
| 1915 | 365 | 100% | Yes |
| 1916 | 366 | 100% | Yes |
| 1917 | 365 | 100% | Yes |
| 1918 | 364 | 100% | Yes |
| 1919 | 365 | 100% | Yes |
| 1920 | 366 | 100% | Yes |
| 1921 | 365 | 100% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 363 | 99% | Yes |
| 1925 | 361 | 99% | Yes |
| 1926 | 364 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 333 | 91% | Yes |
| 1929 | 275 | 75% | No |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 365 | 100% | Yes |
| 1933 | 342 | 94% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 303 | 83% | No |
| 1937 | 364 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 364 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 358 | 98% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 364 | 99% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 363 | 99% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 361 | 99% | Yes |
| 1955 | 351 | 96% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 359 | 98% | Yes |
| 1960 | 361 | 99% | Yes |
| 1961 | 358 | 98% | Yes |
| 1962 | 358 | 98% | Yes |
| 1963 | 359 | 98% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 363 | 99% | Yes |
| 1966 | 362 | 99% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 360 | 99% | Yes |
| 1972 | 364 | 99% | Yes |
| 1973 | 349 | 96% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 363 | 99% | Yes |
| 1976 | 360 | 98% | Yes |
| 1977 | 328 | 90% | No |
| 1978 | 337 | 92% | Yes |
| 1979 | 353 | 97% | Yes |
| 1980 | 342 | 93% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 347 | 95% | Yes |
| 1983 | 346 | 95% | Yes |
| 1984 | 362 | 99% | Yes |
| 1985 | 357 | 98% | Yes |
| 1986 | 356 | 98% | Yes |
| 1987 | 352 | 96% | Yes |
| 1988 | 350 | 96% | Yes |
| 1989 | 352 | 96% | Yes |
| 1990 | 330 | 90% | Yes |
| 1991 | 310 | 85% | No |
| 1992 | 314 | 86% | No |
| 1993 | 192 | 53% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 9 June 1993 | Johnstown, US | daily rain | 38.9 mm (1.5 in) | 5.9 mm (0.23 in) | 4 years | 16 of 100 (Routine) |
| 27 April 1993 | Johnstown, US | daily low min | -2.8 C (27.0 F) | 0.6 C (1.1 F) | 67 years | 31 of 100 (Routine) |
| 22 April 1993 | Johnstown, US | daily snowfall | 2.5 cm (1.0 in) | 1.5 cm (0.6 in) | 40 years | 20 of 100 (Routine) |
| 15 March 1993 | Johnstown, US | daily snow depth | 48.3 cm (19.0 in) | 33.1 cm (13.0 in) | 87 years | 73 of 100 (Major) |
| 15 March 1993 | Johnstown, US | daily low min (Tie) | -12.2 C (10.0 F) | tie | 32 years | 4 of 100 (Routine) |
| 14 March 1993 | Johnstown, US | daily snow depth | 50.8 cm (20.0 in) | 38.1 cm (15.0 in) | 79 years | 73 of 100 (Major) |
| 14 March 1993 | Johnstown, US | daily low max | -6.7 C (19.9 F) | 5.0 C (9.0 F) | 60 years | 34 of 100 (Routine) |
| 14 March 1993 | Johnstown, US | daily snowfall | 20.3 cm (8.0 in) | 7.6 cm (3.0 in) | 2 years | 25 of 100 (Routine) |
| 13 March 1993 | Johnstown, US | daily snowfall | 30.5 cm (12.0 in) | 21.6 cm (8.5 in) | 72 years | 71 of 100 (Major) |
| 13 March 1993 | Johnstown, US | daily snow depth | 30.5 cm (12.0 in) | 10.2 cm (4.0 in) | 79 years | 44 of 100 (Notable) |
| 24 February 1993 | Johnstown, US | daily snowfall | 12.7 cm (5.0 in) | 2.5 cm (1.0 in) | 86 years | 39 of 100 (Notable) |
| 16 February 1993 | Johnstown, US | daily rain | 22.9 mm (0.9 in) | 2.6 mm (0.10 in) | 35 years | 20 of 100 (Routine) |
| 16 February 1993 | Johnstown, US | daily snowfall (Tie) | 20.3 cm (8.0 in) | tie | 35 years | 5 of 100 (Routine) |
| 4 January 1993 | Johnstown, US | daily high max | 19.4 C (66.9 F) | 1.1 C (2.0 F) | 43 years | 23 of 100 (Routine) |
| 11 December 1992 | Johnstown, US | daily snow depth | 38.1 cm (15.0 in) | 5.1 cm (2.0 in) | 82 years | 41 of 100 (Notable) |
| 10 December 1992 | Johnstown, US | daily snowfall | 22.9 cm (9.0 in) | 12.5 cm (4.9 in) | 60 years | 61 of 100 (Major) |
| 15 August 1992 | Johnstown, US | daily low max (Tie) | 20.6 C (69.1 F) | tie | 83 years | 8 of 100 (Routine) |
| 1 August 1992 | Johnstown, US | daily low min | 3.9 C (39.0 F) | 3.3 C (5.9 F) | 74 years | 39 of 100 (Notable) |
| 22 June 1992 | Johnstown, US | daily low min | 1.7 C (35.1 F) | 3.9 C (7.0 F) | 94 years | 46 of 100 (Notable) |
| 21 June 1992 | Johnstown, US | daily low max | 13.9 C (57.0 F) | 3.3 C (5.9 F) | 52 years | 31 of 100 (Routine) |
Climate Trend
80 complete years, 1894 to 1990| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1894 | 11.5 C | +0.63 C |
| 1898 | 11.4 C | +0.53 C |
| 1899 | 11.2 C | +0.34 C |
| 1900 | 11.5 C | +0.69 C |
| 1901 | 10.6 C | -0.25 C |
| 1902 | 11.0 C | +0.12 C |
| 1903 | 10.8 C | -0.03 C |
| 1904 | 9.8 C | -1.01 C |
| 1906 | 11.2 C | +0.41 C |
| 1907 | 9.9 C | -0.94 C |
| 1908 | 11.2 C | +0.36 C |
| 1911 | 11.8 C | +0.94 C |
| 1912 | 10.4 C | -0.46 C |
| 1913 | 11.7 C | +0.86 C |
| 1914 | 10.4 C | -0.43 C |
| 1915 | 10.6 C | -0.25 C |
| 1916 | 10.3 C | -0.49 C |
| 1917 | 9.1 C | -1.78 C |
| 1918 | 10.8 C | -0.03 C |
| 1919 | 11.3 C | +0.44 C |
| 1920 | 10.2 C | -0.66 C |
| 1921 | 12.4 C | +1.53 C |
| 1922 | 11.7 C | +0.82 C |
| 1923 | 11.0 C | +0.18 C |
| 1924 | 9.9 C | -0.97 C |
| 1925 | 11.0 C | +0.12 C |
| 1926 | 10.2 C | -0.66 C |
| 1927 | 11.1 C | +0.29 C |
| 1930 | 11.3 C | +0.50 C |
| 1931 | 12.2 C | +1.38 C |
| 1932 | 11.6 C | +0.74 C |
| 1934 | 11.2 C | +0.32 C |
| 1935 | 10.9 C | +0.09 C |
| 1937 | 11.1 C | +0.22 C |
| 1938 | 11.9 C | +1.08 C |
| 1939 | 12.0 C | +1.18 C |
| 1940 | 8.8 C | -2.02 C |
| 1941 | 10.1 C | -0.76 C |
| 1942 | 9.9 C | -0.90 C |
| 1943 | 9.5 C | -1.38 C |
| 1944 | 10.0 C | -0.86 C |
| 1945 | 10.7 C | -0.17 C |
| 1946 | 11.7 C | +0.87 C |
| 1947 | 11.0 C | +0.12 C |
| 1948 | 11.1 C | +0.25 C |
| 1949 | 12.4 C | +1.56 C |
| 1950 | 10.6 C | -0.22 C |
| 1951 | 11.1 C | +0.30 C |
| 1952 | 11.5 C | +0.69 C |
| 1953 | 12.1 C | +1.24 C |
| 1954 | 11.3 C | +0.51 C |
| 1956 | 10.5 C | -0.34 C |
| 1957 | 10.1 C | -0.73 C |
| 1958 | 9.7 C | -1.11 C |
| 1959 | 11.2 C | +0.41 C |
| 1960 | 10.1 C | -0.74 C |
| 1961 | 9.7 C | -1.18 C |
| 1962 | 9.9 C | -0.95 C |
| 1963 | 9.5 C | -1.30 C |
| 1964 | 10.7 C | -0.16 C |
| 1965 | 11.0 C | +0.19 C |
| 1966 | 10.1 C | -0.71 C |
| 1967 | 10.5 C | -0.30 C |
| 1968 | 10.6 C | -0.25 C |
| 1969 | 10.3 C | -0.51 C |
| 1970 | 10.8 C | -0.06 C |
| 1972 | 10.3 C | -0.57 C |
| 1974 | 10.7 C | -0.09 C |
| 1975 | 11.4 C | +0.55 C |
| 1976 | 10.1 C | -0.74 C |
| 1981 | 10.2 C | -0.66 C |
| 1982 | 10.7 C | -0.09 C |
| 1983 | 10.2 C | -0.59 C |
| 1984 | 11.3 C | +0.43 C |
| 1985 | 11.3 C | +0.49 C |
| 1986 | 11.6 C | +0.79 C |
| 1987 | 12.1 C | +1.24 C |
| 1988 | 11.4 C | +0.52 C |
| 1989 | 11.0 C | +0.17 C |
| 1990 | 12.2 C | +1.38 C |
The fitted trend in annual mean temperature here over 1894 to 1990 is -0.01 C (-0.07 to 0.06) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.01 F (-0.13 to 0.10) per decade. The slope is a straight line fitted to 80 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.01 C (-0.07 to 0.06) per decade | -0.01 F (-0.13 to 0.10) per decade | 1894 to 1990 | 80 | Not clearly different from zero |
| Mean daily maximum | 0.02 C (-0.06 to 0.09) per decade | 0.03 F (-0.11 to 0.17) per decade | 1894 to 1990 | 80 | Not clearly different from zero |
| Mean daily minimum | -0.03 C (-0.09 to 0.03) per decade | -0.1 F (-0.2 to 0.1) per decade | 1894 to 1990 | 80 | Not clearly different from zero |
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
1892 to 1993| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.0 C (104.0 F) | 1936 | 36.1 C (97.0 F) | 100 |
| Coldest night (TNn) | -27.8 C (-18.0 F) | 1912 | -19.4 C (-2.9 F) | 100 |
| Wettest day (Rx1day) | 222.3 mm (8.8 in) | 1977 | 51.1 mm (2.0 in) | 102 |
| Wettest five days (Rx5day) | 267.0 mm (10.5 in) | 1977 | 87.8 mm (3.5 in) | 102 |
| Longest dry spell (CDD) | 30 days | 1924 | 14 days | 102 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1892 | n/a |
| 1893 | n/a |
| 1894 | 37.2 C (99.0 F) |
| 1895 | 38.9 C (102.0 F) |
| 1896 | 35.0 C (95.0 F) |
| 1897 | 37.2 C (99.0 F) |
| 1898 | 37.8 C (100.0 F) |
| 1899 | 36.1 C (97.0 F) |
| 1900 | 36.7 C (98.1 F) |
| 1901 | 36.7 C (98.1 F) |
| 1902 | 36.1 C (97.0 F) |
| 1903 | 33.3 C (91.9 F) |
| 1904 | 35.0 C (95.0 F) |
| 1905 | 35.0 C (95.0 F) |
| 1906 | 35.0 C (95.0 F) |
| 1907 | 32.8 C (91.0 F) |
| 1908 | 36.7 C (98.1 F) |
| 1909 | 35.6 C (96.1 F) |
| 1910 | 34.4 C (93.9 F) |
| 1911 | 38.3 C (100.9 F) |
| 1912 | 35.6 C (96.1 F) |
| 1913 | 36.7 C (98.1 F) |
| 1914 | 36.1 C (97.0 F) |
| 1915 | 35.0 C (95.0 F) |
| 1916 | 36.1 C (97.0 F) |
| 1917 | 36.1 C (97.0 F) |
| 1918 | 39.4 C (102.9 F) |
| 1919 | 37.2 C (99.0 F) |
| 1920 | 33.3 C (91.9 F) |
| 1921 | 36.1 C (97.0 F) |
| 1922 | 36.7 C (98.1 F) |
| 1923 | 37.8 C (100.0 F) |
| 1924 | 36.7 C (98.1 F) |
| 1925 | 37.8 C (100.0 F) |
| 1926 | 38.3 C (100.9 F) |
| 1927 | 35.6 C (96.1 F) |
| 1928 | 35.6 C (96.1 F) |
| 1929 | 36.1 C (97.0 F) |
| 1930 | 38.9 C (102.0 F) |
| 1931 | 36.7 C (98.1 F) |
| 1932 | 36.7 C (98.1 F) |
| 1933 | 38.3 C (100.9 F) |
| 1934 | 37.2 C (99.0 F) |
| 1935 | 35.6 C (96.1 F) |
| 1936 | 40.0 C (104.0 F) |
| 1937 | 35.6 C (96.1 F) |
| 1938 | 34.4 C (93.9 F) |
| 1939 | 36.1 C (97.0 F) |
| 1940 | 33.9 C (93.0 F) |
| 1941 | 33.9 C (93.0 F) |
| 1942 | 33.9 C (93.0 F) |
| 1943 | 33.9 C (93.0 F) |
| 1944 | 35.0 C (95.0 F) |
| 1945 | 35.6 C (96.1 F) |
| 1946 | 35.0 C (95.0 F) |
| 1947 | 35.6 C (96.1 F) |
| 1948 | 38.3 C (100.9 F) |
| 1949 | 37.2 C (99.0 F) |
| 1950 | 35.6 C (96.1 F) |
| 1951 | 35.6 C (96.1 F) |
| 1952 | 37.2 C (99.0 F) |
| 1953 | 40.0 C (104.0 F) |
| 1954 | 36.1 C (97.0 F) |
| 1955 | 36.7 C (98.1 F) |
| 1956 | 35.6 C (96.1 F) |
| 1957 | 36.7 C (98.1 F) |
| 1958 | 34.4 C (93.9 F) |
| 1959 | 36.1 C (97.0 F) |
| 1960 | 32.8 C (91.0 F) |
| 1961 | 35.0 C (95.0 F) |
| 1962 | 35.6 C (96.1 F) |
| 1963 | 35.6 C (96.1 F) |
| 1964 | 36.1 C (97.0 F) |
| 1965 | 37.2 C (99.0 F) |
| 1966 | 37.8 C (100.0 F) |
| 1967 | 35.0 C (95.0 F) |
| 1968 | 35.6 C (96.1 F) |
| 1969 | 36.1 C (97.0 F) |
| 1970 | 34.4 C (93.9 F) |
| 1971 | 36.7 C (98.1 F) |
| 1972 | 36.1 C (97.0 F) |
| 1973 | 38.3 C (100.9 F) |
| 1974 | 35.6 C (96.1 F) |
| 1975 | 37.8 C (100.0 F) |
| 1976 | 35.0 C (95.0 F) |
| 1977 | 36.1 C (97.0 F) |
| 1978 | 35.0 C (95.0 F) |
| 1979 | 33.9 C (93.0 F) |
| 1980 | 36.7 C (98.1 F) |
| 1981 | 35.0 C (95.0 F) |
| 1982 | 35.0 C (95.0 F) |
| 1983 | 36.7 C (98.1 F) |
| 1984 | 35.0 C (95.0 F) |
| 1985 | 34.4 C (93.9 F) |
| 1986 | 35.6 C (96.1 F) |
| 1987 | 36.1 C (97.0 F) |
| 1988 | 39.4 C (102.9 F) |
| 1989 | 35.6 C (96.1 F) |
| 1990 | 34.4 C (93.9 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 33.9 C (93.0 F) |
| 1993 | 36.7 C (98.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1892 | n/a |
| 1893 | n/a |
| 1894 | -18.9 C (-2.0 F) |
| 1895 | -17.8 C (0.0 F) |
| 1896 | -15.0 C (5.0 F) |
| 1897 | -22.2 C (-8.0 F) |
| 1898 | -20.0 C (-4.0 F) |
| 1899 | -27.2 C (-17.0 F) |
| 1900 | -21.7 C (-7.1 F) |
| 1901 | -18.3 C (-0.9 F) |
| 1902 | -18.9 C (-2.0 F) |
| 1903 | -19.4 C (-2.9 F) |
| 1904 | -26.1 C (-15.0 F) |
| 1905 | -24.4 C (-11.9 F) |
| 1906 | -18.9 C (-2.0 F) |
| 1907 | -23.3 C (-9.9 F) |
| 1908 | -22.8 C (-9.0 F) |
| 1909 | -15.0 C (5.0 F) |
| 1910 | -15.6 C (3.9 F) |
| 1911 | -15.6 C (3.9 F) |
| 1912 | -27.8 C (-18.0 F) |
| 1913 | -15.0 C (5.0 F) |
| 1914 | -23.3 C (-9.9 F) |
| 1915 | -17.8 C (0.0 F) |
| 1916 | -20.0 C (-4.0 F) |
| 1917 | -23.9 C (-11.0 F) |
| 1918 | -23.3 C (-9.9 F) |
| 1919 | -18.9 C (-2.0 F) |
| 1920 | -17.8 C (0.0 F) |
| 1921 | -16.1 C (3.0 F) |
| 1922 | -17.8 C (0.0 F) |
| 1923 | -16.7 C (1.9 F) |
| 1924 | -20.6 C (-5.1 F) |
| 1925 | -21.7 C (-7.1 F) |
| 1926 | -18.9 C (-2.0 F) |
| 1927 | -17.8 C (0.0 F) |
| 1928 | -16.7 C (1.9 F) |
| 1929 | -16.1 C (3.0 F) |
| 1930 | -17.2 C (1.0 F) |
| 1931 | -13.3 C (8.1 F) |
| 1932 | -16.1 C (3.0 F) |
| 1933 | -17.8 C (0.0 F) |
| 1934 | -25.0 C (-13.0 F) |
| 1935 | -19.4 C (-2.9 F) |
| 1936 | -24.4 C (-11.9 F) |
| 1937 | -15.0 C (5.0 F) |
| 1938 | -16.1 C (3.0 F) |
| 1939 | -16.1 C (3.0 F) |
| 1940 | -21.1 C (-6.0 F) |
| 1941 | -18.9 C (-2.0 F) |
| 1942 | -23.3 C (-9.9 F) |
| 1943 | -23.3 C (-9.9 F) |
| 1944 | -21.1 C (-6.0 F) |
| 1945 | -22.2 C (-8.0 F) |
| 1946 | -21.7 C (-7.1 F) |
| 1947 | -21.1 C (-6.0 F) |
| 1948 | -22.2 C (-8.0 F) |
| 1949 | -15.0 C (5.0 F) |
| 1950 | -20.0 C (-4.0 F) |
| 1951 | -18.3 C (-0.9 F) |
| 1952 | -13.3 C (8.1 F) |
| 1953 | -11.7 C (10.9 F) |
| 1954 | -18.9 C (-2.0 F) |
| 1955 | -20.6 C (-5.1 F) |
| 1956 | -13.9 C (7.0 F) |
| 1957 | -21.7 C (-7.1 F) |
| 1958 | -22.2 C (-8.0 F) |
| 1959 | -17.8 C (0.0 F) |
| 1960 | -20.0 C (-4.0 F) |
| 1961 | -23.3 C (-9.9 F) |
| 1962 | -20.0 C (-4.0 F) |
| 1963 | -25.6 C (-14.1 F) |
| 1964 | -18.9 C (-2.0 F) |
| 1965 | -19.4 C (-2.9 F) |
| 1966 | -21.7 C (-7.1 F) |
| 1967 | -18.3 C (-0.9 F) |
| 1968 | -22.2 C (-8.0 F) |
| 1969 | -17.8 C (0.0 F) |
| 1970 | -19.4 C (-2.9 F) |
| 1971 | -20.0 C (-4.0 F) |
| 1972 | -21.7 C (-7.1 F) |
| 1973 | -19.4 C (-2.9 F) |
| 1974 | -12.8 C (9.0 F) |
| 1975 | -18.3 C (-0.9 F) |
| 1976 | -20.0 C (-4.0 F) |
| 1977 | -25.6 C (-14.1 F) |
| 1978 | -22.8 C (-9.0 F) |
| 1979 | -21.1 C (-6.0 F) |
| 1980 | -18.9 C (-2.0 F) |
| 1981 | -20.0 C (-4.0 F) |
| 1982 | -26.1 C (-15.0 F) |
| 1983 | -26.1 C (-15.0 F) |
| 1984 | -22.8 C (-9.0 F) |
| 1985 | -26.7 C (-16.1 F) |
| 1986 | -17.2 C (1.0 F) |
| 1987 | -16.7 C (1.9 F) |
| 1988 | -19.4 C (-2.9 F) |
| 1989 | -20.6 C (-5.1 F) |
| 1990 | -18.9 C (-2.0 F) |
| 1991 | -13.3 C (8.1 F) |
| 1992 | -17.8 C (0.0 F) |
| 1993 | -15.6 C (3.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1892 | 27.9 mm (1.1 in) |
| 1893 | 35.6 mm (1.4 in) |
| 1894 | 51.1 mm (2.0 in) |
| 1895 | 61.0 mm (2.4 in) |
| 1896 | 55.4 mm (2.2 in) |
| 1897 | 62.7 mm (2.5 in) |
| 1898 | 58.9 mm (2.3 in) |
| 1899 | 59.4 mm (2.3 in) |
| 1900 | 58.4 mm (2.3 in) |
| 1901 | 52.3 mm (2.1 in) |
| 1902 | 37.3 mm (1.5 in) |
| 1903 | 56.1 mm (2.2 in) |
| 1904 | 50.8 mm (2.0 in) |
| 1905 | 69.1 mm (2.7 in) |
| 1906 | 67.1 mm (2.6 in) |
| 1907 | 45.0 mm (1.8 in) |
| 1908 | 68.6 mm (2.7 in) |
| 1909 | 46.2 mm (1.8 in) |
| 1910 | 35.6 mm (1.4 in) |
| 1911 | 72.4 mm (2.9 in) |
| 1912 | 113.3 mm (4.5 in) |
| 1913 | 49.3 mm (1.9 in) |
| 1914 | 61.0 mm (2.4 in) |
| 1915 | 38.1 mm (1.5 in) |
| 1916 | 51.8 mm (2.0 in) |
| 1917 | 53.6 mm (2.1 in) |
| 1918 | 44.7 mm (1.8 in) |
| 1919 | 41.9 mm (1.6 in) |
| 1920 | 40.1 mm (1.6 in) |
| 1921 | 48.0 mm (1.9 in) |
| 1922 | 36.6 mm (1.4 in) |
| 1923 | 45.5 mm (1.8 in) |
| 1924 | 56.9 mm (2.2 in) |
| 1925 | 53.6 mm (2.1 in) |
| 1926 | 44.7 mm (1.8 in) |
| 1927 | 60.2 mm (2.4 in) |
| 1928 | 43.4 mm (1.7 in) |
| 1929 | 73.7 mm (2.9 in) |
| 1930 | 47.0 mm (1.9 in) |
| 1931 | 61.0 mm (2.4 in) |
| 1932 | 56.6 mm (2.2 in) |
| 1933 | 33.5 mm (1.3 in) |
| 1934 | 62.5 mm (2.5 in) |
| 1935 | 65.3 mm (2.6 in) |
| 1936 | 58.4 mm (2.3 in) |
| 1937 | 50.3 mm (2.0 in) |
| 1938 | 29.5 mm (1.2 in) |
| 1939 | 56.9 mm (2.2 in) |
| 1940 | 46.0 mm (1.8 in) |
| 1941 | 56.4 mm (2.2 in) |
| 1942 | 83.8 mm (3.3 in) |
| 1943 | 40.1 mm (1.6 in) |
| 1944 | 47.5 mm (1.9 in) |
| 1945 | 108.5 mm (4.3 in) |
| 1946 | 82.0 mm (3.2 in) |
| 1947 | 40.4 mm (1.6 in) |
| 1948 | 49.3 mm (1.9 in) |
| 1949 | 51.1 mm (2.0 in) |
| 1950 | 60.2 mm (2.4 in) |
| 1951 | 41.9 mm (1.6 in) |
| 1952 | 68.6 mm (2.7 in) |
| 1953 | 58.4 mm (2.3 in) |
| 1954 | 92.7 mm (3.6 in) |
| 1955 | 42.2 mm (1.7 in) |
| 1956 | 45.7 mm (1.8 in) |
| 1957 | 31.2 mm (1.2 in) |
| 1958 | 30.0 mm (1.2 in) |
| 1959 | 48.0 mm (1.9 in) |
| 1960 | 48.8 mm (1.9 in) |
| 1961 | 35.6 mm (1.4 in) |
| 1962 | 51.1 mm (2.0 in) |
| 1963 | 38.1 mm (1.5 in) |
| 1964 | 103.9 mm (4.1 in) |
| 1965 | 45.2 mm (1.8 in) |
| 1966 | 76.2 mm (3.0 in) |
| 1967 | 63.5 mm (2.5 in) |
| 1968 | 45.7 mm (1.8 in) |
| 1969 | 47.0 mm (1.9 in) |
| 1970 | 50.8 mm (2.0 in) |
| 1971 | 50.8 mm (2.0 in) |
| 1972 | 69.9 mm (2.8 in) |
| 1973 | 38.6 mm (1.5 in) |
| 1974 | 53.3 mm (2.1 in) |
| 1975 | 54.6 mm (2.1 in) |
| 1976 | 61.0 mm (2.4 in) |
| 1977 | 222.3 mm (8.8 in) |
| 1978 | 62.0 mm (2.4 in) |
| 1979 | 49.8 mm (2.0 in) |
| 1980 | 55.9 mm (2.2 in) |
| 1981 | 59.4 mm (2.3 in) |
| 1982 | 49.3 mm (1.9 in) |
| 1983 | 54.4 mm (2.1 in) |
| 1984 | 39.9 mm (1.6 in) |
| 1985 | 53.1 mm (2.1 in) |
| 1986 | 53.3 mm (2.1 in) |
| 1987 | 51.3 mm (2.0 in) |
| 1988 | 59.4 mm (2.3 in) |
| 1989 | 39.1 mm (1.5 in) |
| 1990 | 45.7 mm (1.8 in) |
| 1991 | 50.8 mm (2.0 in) |
| 1992 | 43.2 mm (1.7 in) |
| 1993 | 38.9 mm (1.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1892 | 56.3 mm (2.2 in) |
| 1893 | 76.3 mm (3.0 in) |
| 1894 | 101.6 mm (4.0 in) |
| 1895 | 74.7 mm (2.9 in) |
| 1896 | 70.1 mm (2.8 in) |
| 1897 | 62.7 mm (2.5 in) |
| 1898 | 92.0 mm (3.6 in) |
| 1899 | 86.6 mm (3.4 in) |
| 1900 | 81.2 mm (3.2 in) |
| 1901 | 81.9 mm (3.2 in) |
| 1902 | 96.0 mm (3.8 in) |
| 1903 | 95.8 mm (3.8 in) |
| 1904 | 123.7 mm (4.9 in) |
| 1905 | 88.3 mm (3.5 in) |
| 1906 | 119.6 mm (4.7 in) |
| 1907 | 93.3 mm (3.7 in) |
| 1908 | 96.3 mm (3.8 in) |
| 1909 | 63.2 mm (2.5 in) |
| 1910 | 59.9 mm (2.4 in) |
| 1911 | 85.1 mm (3.4 in) |
| 1912 | 128.0 mm (5.0 in) |
| 1913 | 82.6 mm (3.3 in) |
| 1914 | 103.7 mm (4.1 in) |
| 1915 | 81.9 mm (3.2 in) |
| 1916 | 87.3 mm (3.4 in) |
| 1917 | 72.6 mm (2.9 in) |
| 1918 | 72.1 mm (2.8 in) |
| 1919 | 95.8 mm (3.8 in) |
| 1920 | 104.9 mm (4.1 in) |
| 1921 | 98.8 mm (3.9 in) |
| 1922 | 72.1 mm (2.8 in) |
| 1923 | 91.5 mm (3.6 in) |
| 1924 | 89.5 mm (3.5 in) |
| 1925 | 86.9 mm (3.4 in) |
| 1926 | 117.8 mm (4.6 in) |
| 1927 | 94.0 mm (3.7 in) |
| 1928 | 65.2 mm (2.6 in) |
| 1929 | 113.8 mm (4.5 in) |
| 1930 | 67.9 mm (2.7 in) |
| 1931 | 84.2 mm (3.3 in) |
| 1932 | 61.2 mm (2.4 in) |
| 1933 | 77.4 mm (3.0 in) |
| 1934 | 86.6 mm (3.4 in) |
| 1935 | 116.6 mm (4.6 in) |
| 1936 | 100.8 mm (4.0 in) |
| 1937 | 110.0 mm (4.3 in) |
| 1938 | 73.2 mm (2.9 in) |
| 1939 | 82.1 mm (3.2 in) |
| 1940 | 82.3 mm (3.2 in) |
| 1941 | 96.3 mm (3.8 in) |
| 1942 | 106.4 mm (4.2 in) |
| 1943 | 76.0 mm (3.0 in) |
| 1944 | 91.1 mm (3.6 in) |
| 1945 | 109.8 mm (4.3 in) |
| 1946 | 95.5 mm (3.8 in) |
| 1947 | 92.2 mm (3.6 in) |
| 1948 | 115.9 mm (4.6 in) |
| 1949 | 70.4 mm (2.8 in) |
| 1950 | 83.6 mm (3.3 in) |
| 1951 | 83.8 mm (3.3 in) |
| 1952 | 95.5 mm (3.8 in) |
| 1953 | 68.8 mm (2.7 in) |
| 1954 | 96.3 mm (3.8 in) |
| 1955 | 89.2 mm (3.5 in) |
| 1956 | 60.9 mm (2.4 in) |
| 1957 | 73.6 mm (2.9 in) |
| 1958 | 81.8 mm (3.2 in) |
| 1959 | 60.2 mm (2.4 in) |
| 1960 | 101.2 mm (4.0 in) |
| 1961 | 66.1 mm (2.6 in) |
| 1962 | 104.9 mm (4.1 in) |
| 1963 | 65.1 mm (2.6 in) |
| 1964 | 106.0 mm (4.2 in) |
| 1965 | 71.4 mm (2.8 in) |
| 1966 | 78.2 mm (3.1 in) |
| 1967 | 150.4 mm (5.9 in) |
| 1968 | 62.4 mm (2.5 in) |
| 1969 | 73.8 mm (2.9 in) |
| 1970 | 107.7 mm (4.2 in) |
| 1971 | 132.2 mm (5.2 in) |
| 1972 | 120.9 mm (4.8 in) |
| 1973 | 59.9 mm (2.4 in) |
| 1974 | 121.6 mm (4.8 in) |
| 1975 | 123.0 mm (4.8 in) |
| 1976 | 91.5 mm (3.6 in) |
| 1977 | 267.0 mm (10.5 in) |
| 1978 | 78.5 mm (3.1 in) |
| 1979 | 75.7 mm (3.0 in) |
| 1980 | 105.4 mm (4.1 in) |
| 1981 | 133.4 mm (5.3 in) |
| 1982 | 60.2 mm (2.4 in) |
| 1983 | 78.8 mm (3.1 in) |
| 1984 | 92.9 mm (3.7 in) |
| 1985 | 99.0 mm (3.9 in) |
| 1986 | 75.4 mm (3.0 in) |
| 1987 | 88.4 mm (3.5 in) |
| 1988 | 199.1 mm (7.8 in) |
| 1989 | 91.3 mm (3.6 in) |
| 1990 | 115.8 mm (4.6 in) |
| 1991 | 61.5 mm (2.4 in) |
| 1992 | 68.3 mm (2.7 in) |
| 1993 | 65.8 mm (2.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1892 | 10 days |
| 1893 | 14 days |
| 1894 | 15 days |
| 1895 | 14 days |
| 1896 | 15 days |
| 1897 | 18 days |
| 1898 | 11 days |
| 1899 | 19 days |
| 1900 | 13 days |
| 1901 | 17 days |
| 1902 | 15 days |
| 1903 | 18 days |
| 1904 | 12 days |
| 1905 | 12 days |
| 1906 | 13 days |
| 1907 | 10 days |
| 1908 | 28 days |
| 1909 | 13 days |
| 1910 | 14 days |
| 1911 | 9 days |
| 1912 | 10 days |
| 1913 | 12 days |
| 1914 | 14 days |
| 1915 | 12 days |
| 1916 | 13 days |
| 1917 | 19 days |
| 1918 | 19 days |
| 1919 | 12 days |
| 1920 | 25 days |
| 1921 | 12 days |
| 1922 | 24 days |
| 1923 | 17 days |
| 1924 | 30 days |
| 1925 | 19 days |
| 1926 | 13 days |
| 1927 | 10 days |
| 1928 | 10 days |
| 1929 | 14 days |
| 1930 | 22 days |
| 1931 | 11 days |
| 1932 | 19 days |
| 1933 | 11 days |
| 1934 | 16 days |
| 1935 | 14 days |
| 1936 | 11 days |
| 1937 | 13 days |
| 1938 | 13 days |
| 1939 | 10 days |
| 1940 | 13 days |
| 1941 | 18 days |
| 1942 | 20 days |
| 1943 | 13 days |
| 1944 | 20 days |
| 1945 | 16 days |
| 1946 | 12 days |
| 1947 | 18 days |
| 1948 | 11 days |
| 1949 | 13 days |
| 1950 | 15 days |
| 1951 | 19 days |
| 1952 | 26 days |
| 1953 | 24 days |
| 1954 | 13 days |
| 1955 | 15 days |
| 1956 | 19 days |
| 1957 | 15 days |
| 1958 | 16 days |
| 1959 | 15 days |
| 1960 | 13 days |
| 1961 | 10 days |
| 1962 | 15 days |
| 1963 | 27 days |
| 1964 | 18 days |
| 1965 | 11 days |
| 1966 | 18 days |
| 1967 | 17 days |
| 1968 | 12 days |
| 1969 | 13 days |
| 1970 | 15 days |
| 1971 | 16 days |
| 1972 | 10 days |
| 1973 | 14 days |
| 1974 | 13 days |
| 1975 | 16 days |
| 1976 | 13 days |
| 1977 | 17 days |
| 1978 | 11 days |
| 1979 | 11 days |
| 1980 | 14 days |
| 1981 | 11 days |
| 1982 | 18 days |
| 1983 | 11 days |
| 1984 | 14 days |
| 1985 | 22 days |
| 1986 | 9 days |
| 1987 | 12 days |
| 1988 | 17 days |
| 1989 | 9 days |
| 1990 | 13 days |
| 1991 | 16 days |
| 1992 | 13 days |
| 1993 | 9 days |
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
80 years with a frostAcross 80 years with a frost, the median last spring frost at Johnstown falls on 29 April and the median first autumn frost on 13 October, which leaves a median of 171 days between them.
In 1954 to 1990 the median growing season was 172 days. The two periods have the same number of growing days.
Fitted over all years, the growing season changes by +0.1 days per decade at this station.
| Measure | Median, all years | Earliest period (1894 to 1931) | Recent period (1954 to 1990) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 29 April | 29 April | 30 April | 1 day later | +0.2 days per decade |
| First autumn frost | 13 October | 14 October | 15 October | 1 day later | +0.3 days per decade |
| Growing days | 171 days | 172 days | 172 days | no change | +0.1 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
96 years, 1893 to 1992A day with at least 50.8 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 103.8 mm (4.1 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 50.8 mm (2.0 in) | |
| 5 years | 63.7 mm (2.5 in) | |
| 10 years | 72.7 mm (2.9 in) | |
| 25 years | 84.7 mm (3.3 in) | |
| 50 years | 94.1 mm (3.7 in) | |
| 100 years | 103.8 mm (4.1 in) | Longer than the 96 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, 96 years of values from 1893 to 1992.
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: 113.3 mm (4.5 in) in 1912; 108.5 mm (4.3 in) in 1945; 103.9 mm (4.1 in) in 1964.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Johnstown, at 1934 and 1940. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1934 ran 0.3 C (0.6 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1940 ran 0.7 C (1.2 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1934 | +0.3 | +0.6 | likely | 5 |
| 1940 | -0.7 | -1.2 | possible | 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).