Lock Haven Weather Records (USC00365104)
Record envelope, standing records and threshold days for Lock Haven (USC00365104), Pennsylvania, United States, with 88 years of record.
Key Facts for Lock Haven
- Lock Haven (USC00365104) is a weather station in Pennsylvania, United States at 41.13 latitude and -77.42 longitude, 168 m (551 ft) above sea level.
- The station reports from 1890 to 1977, 88 years of record.
- 1,464 records set at Lock Haven still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Lock Haven set a monthly record daily snowfall of 2.5 cm (1.0 in) on 17 October 1977.
About the Station
- Location: Pennsylvania, United States, 41.13 latitude, -77.42 longitude.
- Elevation: 168 m (551 ft).
- Period of record: 1890 to 1977, 88 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 | 21.7 C (71.1 F) | -30.0 C (-22.0 F) | n/a | n/a |
| Feb | 23.9 C (75.0 F) | -29.4 C (-20.9 F) | n/a | n/a |
| Mar | 30.0 C (86.0 F) | -21.7 C (-7.1 F) | n/a | n/a |
| Apr | 36.1 C (97.0 F) | -15.0 C (5.0 F) | n/a | n/a |
| May | 38.9 C (102.0 F) | -3.9 C (25.0 F) | n/a | n/a |
| Jun | 40.0 C (104.0 F) | 1.1 C (34.0 F) | n/a | n/a |
| Jul | 40.6 C (105.1 F) | -0.6 C (30.9 F) | n/a | n/a |
| Aug | 40.6 C (105.1 F) | 0.0 C (32.0 F) | n/a | n/a |
| Sep | 39.4 C (102.9 F) | -3.3 C (26.1 F) | n/a | n/a |
| Oct | 33.9 C (93.0 F) | -7.8 C (18.0 F) | n/a | n/a |
| Nov | 28.9 C (84.0 F) | -15.0 C (5.0 F) | n/a | n/a |
| Dec | 18.9 C (66.0 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 | 49 |
| 1895 | 36 |
| 1896 | 32 |
| 1897 | 23 |
| 1898 | 15 |
| 1899 | 24 |
| 1900 | 19 |
| 1901 | 13 |
| 1902 | 9 |
| 1903 | 12 |
| 1904 | 21 |
| 1905 | 22 |
| 1906 | 19 |
| 1907 | 14 |
| 1908 | 13 |
| 1909 | 11 |
| 1910 | 14 |
| 1911 | 15 |
| 1912 | 13 |
| 1913 | 24 |
| 1914 | 30 |
| 1915 | 13 |
| 1916 | 16 |
| 1917 | 30 |
| 1918 | 29 |
| 1919 | 7 |
| 1920 | 16 |
| 1921 | 8 |
| 1923 | 7 |
| 1924 | 38 |
| 1925 | 6 |
| 1926 | 14 |
| 1927 | 14 |
| 1928 | 12 |
| 1929 | 19 |
| 1930 | 40 |
| 1931 | 30 |
| 1932 | 28 |
| 1933 | 22 |
| 1934 | 27 |
| 1935 | 14 |
| 1936 | 21 |
| 1937 | 9 |
| 1938 | 17 |
| 1939 | 8 |
| 1940 | 14 |
| 1941 | 15 |
| 1942 | 21 |
| 1943 | 26 |
| 1944 | 15 |
| 1945 | 23 |
| 1946 | 15 |
| 1947 | 24 |
| 1948 | 7 |
| 1949 | 14 |
| 1950 | 32 |
| 1951 | 20 |
| 1952 | 12 |
| 1953 | 15 |
| 1954 | 18 |
| 1955 | 15 |
| 1956 | 17 |
| 1957 | 14 |
| 1958 | 7 |
| 1959 | 11 |
| 1960 | 20 |
| 1961 | 16 |
| 1962 | 20 |
| 1963 | 17 |
| 1964 | 19 |
| 1965 | 11 |
| 1966 | 22 |
| 1967 | 18 |
| 1968 | 11 |
| 1969 | 9 |
| 1970 | 14 |
| 1971 | 1 |
| 1972 | 10 |
| 1973 | 14 |
| 1974 | 13 |
| 1975 | 9 |
| 1976 | 19 |
| 1977 | 13 |
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 1926-07-13 | Record daily precipitation | Record daily precipitation 111.8 mm (4.4 in) |
| 1941-08-16 | Record daily precipitation | Record daily precipitation 120.1 mm (4.7 in) |
| 1953-11-07 | Record daily snowfall | Record daily snowfall 63.5 cm (25.0 in) |
Wettest Day of Each Month
Aug: 120.1 mm (4.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 50.8 mm (2.0 in) | 3 January 1914 |
| Feb | 52.1 mm (2.1 in) | 6 February 1896 |
| Mar | 59.9 mm (2.4 in) | 14 March 1918 |
| Apr | 50.8 mm (2.0 in) | 10 April 1918 |
| May | 71.1 mm (2.8 in) | 28 May 1946 |
| Jun | 76.2 mm (3.0 in) | 2 June 1916 |
| Jul | 111.8 mm (4.4 in) | 13 July 1926 |
| Aug | 120.1 mm (4.7 in) | 16 August 1941 |
| Sep | 104.1 mm (4.1 in) | 26 September 1975 |
| Oct | 87.4 mm (3.4 in) | 14 October 1896 |
| Nov | 64.5 mm (2.5 in) | 26 November 1950 |
| Dec | 55.4 mm (2.2 in) | 30 December 1942 |
Period of Record Coverage
1894 to 1977| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1894 | 343 | 94% | Yes |
| 1895 | 354 | 97% | Yes |
| 1896 | 355 | 97% | Yes |
| 1897 | 365 | 100% | Yes |
| 1898 | 365 | 100% | Yes |
| 1899 | 365 | 100% | Yes |
| 1900 | 304 | 83% | No |
| 1901 | 347 | 95% | Yes |
| 1902 | 362 | 99% | Yes |
| 1903 | 361 | 99% | Yes |
| 1904 | 365 | 100% | Yes |
| 1905 | 362 | 99% | Yes |
| 1906 | 362 | 99% | Yes |
| 1907 | 361 | 99% | Yes |
| 1908 | 364 | 99% | Yes |
| 1909 | 363 | 99% | Yes |
| 1910 | 351 | 96% | Yes |
| 1911 | 355 | 97% | Yes |
| 1912 | 366 | 100% | Yes |
| 1913 | 364 | 100% | Yes |
| 1914 | 363 | 99% | Yes |
| 1915 | 302 | 83% | No |
| 1916 | 365 | 100% | Yes |
| 1917 | 364 | 100% | Yes |
| 1918 | 364 | 100% | Yes |
| 1919 | 365 | 100% | Yes |
| 1920 | 365 | 100% | Yes |
| 1921 | 269 | 74% | No |
| 1922 | 41 | 11% | No |
| 1923 | 282 | 77% | No |
| 1924 | 196 | 54% | No |
| 1925 | 90 | 25% | No |
| 1926 | 214 | 59% | No |
| 1927 | 364 | 100% | Yes |
| 1928 | 363 | 99% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 362 | 99% | Yes |
| 1931 | 362 | 99% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 364 | 100% | Yes |
| 1935 | 364 | 100% | Yes |
| 1936 | 305 | 83% | No |
| 1937 | 365 | 100% | Yes |
| 1938 | 363 | 99% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 362 | 99% | Yes |
| 1941 | 364 | 100% | Yes |
| 1942 | 364 | 100% | Yes |
| 1943 | 364 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 358 | 98% | Yes |
| 1948 | 279 | 76% | No |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 345 | 94% | Yes |
| 1957 | 352 | 96% | Yes |
| 1958 | 339 | 93% | Yes |
| 1959 | 354 | 97% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 361 | 99% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 354 | 97% | Yes |
| 1964 | 362 | 99% | Yes |
| 1965 | 360 | 99% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 360 | 98% | Yes |
| 1969 | 359 | 98% | Yes |
| 1970 | 270 | 74% | No |
| 1971 | 70 | 19% | No |
| 1972 | 180 | 49% | No |
| 1973 | 293 | 80% | No |
| 1974 | 322 | 88% | No |
| 1975 | 294 | 81% | No |
| 1976 | 274 | 75% | No |
| 1977 | 235 | 64% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 17 October 1977 | Lock Haven, US | monthly snowfall | 2.5 cm (1.0 in) | 2.5 cm (1.0 in) | 75 years | 20 of 100 (Routine) |
| 30 August 1977 | Lock Haven, US | daily high min | 21.1 C (70.0 F) | 1.1 C (2.0 F) | 48 years | 24 of 100 (Routine) |
| 26 August 1977 | Lock Haven, US | daily low min (Tie) | 5.6 C (42.1 F) | tie | 35 years | 4 of 100 (Routine) |
| 20 July 1977 | Lock Haven, US | daily rain | 44.7 mm (1.8 in) | 6.6 mm (0.26 in) | 20 years | 19 of 100 (Routine) |
| 12 July 1977 | Lock Haven, US | daily rain | 24.9 mm (1.0 in) | 3.6 mm (0.14 in) | 40 years | 20 of 100 (Routine) |
| 26 June 1977 | Lock Haven, US | daily rain | 41.1 mm (1.6 in) | 13.4 mm (0.5 in) | 8 years | 22 of 100 (Routine) |
| 10 June 1977 | Lock Haven, US | daily low max | 14.4 C (57.9 F) | 3.9 C (7.0 F) | 67 years | 36 of 100 (Notable) |
| 7 June 1977 | Lock Haven, US | daily low max | 13.3 C (55.9 F) | 5.6 C (10.1 F) | 72 years | 41 of 100 (Notable) |
| 30 April 1977 | Lock Haven, US | daily low min (Tie) | -1.7 C (28.9 F) | tie | 46 years | 5 of 100 (Routine) |
| 24 April 1977 | Lock Haven, US | monthly high min (Tie) | 15.6 C (60.1 F) | tie | 71 years | 9 of 100 (Routine) |
| 23 April 1977 | Lock Haven, US | monthly high min (Tie) | 15.6 C (60.1 F) | tie | 71 years | 9 of 100 (Routine) |
| 14 April 1977 | Lock Haven, US | daily high max (Tie) | 29.4 C (84.9 F) | tie | 80 years | 8 of 100 (Routine) |
| 9 April 1977 | Lock Haven, US | daily low min (Tie) | -6.7 C (19.9 F) | tie | 4 years | 2 of 100 (Routine) |
| 3 April 1977 | Lock Haven, US | daily rain | 42.4 mm (1.7 in) | 10.9 mm (0.4 in) | 76 years | 43 of 100 (Notable) |
| 31 March 1977 | Lock Haven, US | monthly high max | 30.0 C (86.0 F) | 0.6 C (1.1 F) | 72 years | 39 of 100 (Notable) |
| 30 March 1977 | Lock Haven, US | daily high max | 28.3 C (82.9 F) | 1.6 C (2.9 F) | 8 years | 12 of 100 (Routine) |
| 12 March 1977 | Lock Haven, US | daily high max | 22.8 C (73.0 F) | 2.8 C (5.0 F) | 79 years | 35 of 100 (Notable) |
| 26 February 1977 | Lock Haven, US | daily high min | 5.6 C (42.1 F) | 2.8 C (5.0 F) | 48 years | 26 of 100 (Routine) |
| 25 February 1977 | Lock Haven, US | daily rain | 16.5 mm (0.6 in) | 3.5 mm (0.14 in) | 47 years | 20 of 100 (Routine) |
| 31 January 1977 | Lock Haven, US | daily low max | -8.9 C (16.0 F) | 0.6 C (1.1 F) | 11 years | 12 of 100 (Routine) |
Climate Trend
64 complete years, 1896 to 1974| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1896 | 11.1 C | +0.72 C |
| 1897 | 10.9 C | +0.46 C |
| 1898 | 11.6 C | +1.24 C |
| 1899 | 10.9 C | +0.50 C |
| 1901 | 10.8 C | +0.39 C |
| 1902 | 10.7 C | +0.33 C |
| 1903 | 10.4 C | +0.04 C |
| 1904 | 9.0 C | -1.40 C |
| 1905 | 10.2 C | -0.16 C |
| 1906 | 11.1 C | +0.70 C |
| 1907 | 9.5 C | -0.90 C |
| 1908 | 10.6 C | +0.16 C |
| 1909 | 10.5 C | +0.06 C |
| 1910 | 10.4 C | +0.01 C |
| 1911 | 11.2 C | +0.79 C |
| 1912 | 10.0 C | -0.40 C |
| 1913 | 11.6 C | +1.15 C |
| 1914 | 10.2 C | -0.24 C |
| 1916 | 10.2 C | -0.19 C |
| 1917 | 8.6 C | -1.80 C |
| 1918 | 10.2 C | -0.21 C |
| 1919 | 10.6 C | +0.21 C |
| 1920 | 9.2 C | -1.16 C |
| 1927 | 11.4 C | +0.98 C |
| 1928 | 11.2 C | +0.83 C |
| 1929 | 11.1 C | +0.65 C |
| 1930 | 11.8 C | +1.38 C |
| 1931 | 12.6 C | +2.20 C |
| 1932 | 12.1 C | +1.70 C |
| 1933 | 11.7 C | +1.29 C |
| 1934 | 11.0 C | +0.55 C |
| 1935 | 10.7 C | +0.27 C |
| 1937 | 11.0 C | +0.57 C |
| 1938 | 11.4 C | +1.00 C |
| 1939 | 11.3 C | +0.87 C |
| 1940 | 9.6 C | -0.85 C |
| 1941 | 10.3 C | -0.11 C |
| 1942 | 9.9 C | -0.47 C |
| 1943 | 9.8 C | -0.64 C |
| 1944 | 10.6 C | +0.22 C |
| 1945 | 10.5 C | +0.08 C |
| 1946 | 11.2 C | +0.84 C |
| 1947 | 11.0 C | +0.61 C |
| 1949 | 11.0 C | +0.55 C |
| 1950 | 9.4 C | -0.99 C |
| 1951 | 10.4 C | -0.03 C |
| 1952 | 11.0 C | +0.62 C |
| 1953 | 11.4 C | +0.95 C |
| 1954 | 10.7 C | +0.30 C |
| 1955 | 10.7 C | +0.26 C |
| 1957 | 11.0 C | +0.62 C |
| 1958 | 9.7 C | -0.66 C |
| 1959 | 11.0 C | +0.55 C |
| 1960 | 9.1 C | -1.27 C |
| 1961 | 9.6 C | -0.81 C |
| 1962 | 8.9 C | -1.52 C |
| 1963 | 8.4 C | -1.98 C |
| 1964 | 9.3 C | -1.10 C |
| 1965 | 9.3 C | -1.08 C |
| 1966 | 8.9 C | -1.52 C |
| 1967 | 8.6 C | -1.80 C |
| 1968 | 9.0 C | -1.42 C |
| 1969 | 9.2 C | -1.23 C |
| 1974 | 9.5 C | -0.91 C |
The annual mean temperature here has fallen by 0.2 C (0.1 to 0.2) per decade over 1896 to 1974. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 64 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 (-0.2 to -0.1) per decade | -0.3 F (-0.4 to -0.1) per decade | 1896 to 1974 | 64 | Fall |
| Mean daily maximum | -0.12 C (-0.23 to -0.02) per decade | -0.22 F (-0.41 to -0.03) per decade | 1896 to 1974 | 64 | Fall |
| Mean daily minimum | -0.2 C (-0.3 to -0.1) per decade | -0.3 F (-0.5 to -0.1) per decade | 1896 to 1974 | 64 | Fall |
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
1890 to 1977| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.6 C (105.1 F) | 1911 | 36.7 C (98.1 F) | 84 |
| Coldest night (TNn) | -30.0 C (-22.0 F) | 1912 | -21.1 C (-6.0 F) | 84 |
| Wettest day (Rx1day) | 120.1 mm (4.7 in) | 1941 | 51.5 mm (2.0 in) | 88 |
| Wettest five days (Rx5day) | 168.4 mm (6.6 in) | 1975 | 79.9 mm (3.1 in) | 88 |
| Longest dry spell (CDD) | 31 days | 1963 | 15 days | 88 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1890 | n/a |
| 1891 | n/a |
| 1892 | n/a |
| 1893 | n/a |
| 1894 | 38.9 C (102.0 F) |
| 1895 | 39.4 C (102.9 F) |
| 1896 | 36.1 C (97.0 F) |
| 1897 | 36.7 C (98.1 F) |
| 1898 | 38.9 C (102.0 F) |
| 1899 | 37.8 C (100.0 F) |
| 1900 | 38.9 C (102.0 F) |
| 1901 | 38.9 C (102.0 F) |
| 1902 | 33.9 C (93.0 F) |
| 1903 | 35.6 C (96.1 F) |
| 1904 | 37.2 C (99.0 F) |
| 1905 | 36.7 C (98.1 F) |
| 1906 | 36.1 C (97.0 F) |
| 1907 | 33.9 C (93.0 F) |
| 1908 | 36.7 C (98.1 F) |
| 1909 | 37.2 C (99.0 F) |
| 1910 | 37.2 C (99.0 F) |
| 1911 | 40.6 C (105.1 F) |
| 1912 | 37.8 C (100.0 F) |
| 1913 | 36.7 C (98.1 F) |
| 1914 | 36.7 C (98.1 F) |
| 1915 | 36.1 C (97.0 F) |
| 1916 | 38.9 C (102.0 F) |
| 1917 | 37.8 C (100.0 F) |
| 1918 | 40.0 C (104.0 F) |
| 1919 | 37.8 C (100.0 F) |
| 1920 | 35.6 C (96.1 F) |
| 1921 | 37.8 C (100.0 F) |
| 1922 | 23.3 C (73.9 F) |
| 1923 | 36.7 C (98.1 F) |
| 1924 | 32.2 C (90.0 F) |
| 1925 | 25.6 C (78.1 F) |
| 1926 | 36.7 C (98.1 F) |
| 1927 | 37.2 C (99.0 F) |
| 1928 | 36.7 C (98.1 F) |
| 1929 | 36.7 C (98.1 F) |
| 1930 | 40.6 C (105.1 F) |
| 1931 | 40.6 C (105.1 F) |
| 1932 | 39.4 C (102.9 F) |
| 1933 | 40.0 C (104.0 F) |
| 1934 | 38.9 C (102.0 F) |
| 1935 | 36.1 C (97.0 F) |
| 1936 | 40.6 C (105.1 F) |
| 1937 | 36.7 C (98.1 F) |
| 1938 | 36.1 C (97.0 F) |
| 1939 | 35.0 C (95.0 F) |
| 1940 | 35.6 C (96.1 F) |
| 1941 | 37.8 C (100.0 F) |
| 1942 | 35.0 C (95.0 F) |
| 1943 | 37.2 C (99.0 F) |
| 1944 | 38.9 C (102.0 F) |
| 1945 | 35.6 C (96.1 F) |
| 1946 | 35.0 C (95.0 F) |
| 1947 | 35.0 C (95.0 F) |
| 1948 | 35.6 C (96.1 F) |
| 1949 | 38.9 C (102.0 F) |
| 1950 | 34.4 C (93.9 F) |
| 1951 | 35.6 C (96.1 F) |
| 1952 | 38.9 C (102.0 F) |
| 1953 | 39.4 C (102.9 F) |
| 1954 | 37.2 C (99.0 F) |
| 1955 | 38.9 C (102.0 F) |
| 1956 | 36.7 C (98.1 F) |
| 1957 | 36.7 C (98.1 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 36.1 C (97.0 F) |
| 1960 | 34.4 C (93.9 F) |
| 1961 | 33.3 C (91.9 F) |
| 1962 | 35.6 C (96.1 F) |
| 1963 | 35.0 C (95.0 F) |
| 1964 | 35.6 C (96.1 F) |
| 1965 | 34.4 C (93.9 F) |
| 1966 | 38.9 C (102.0 F) |
| 1967 | 33.9 C (93.0 F) |
| 1968 | 34.4 C (93.9 F) |
| 1969 | 35.0 C (95.0 F) |
| 1970 | 33.9 C (93.0 F) |
| 1971 | 32.2 C (90.0 F) |
| 1972 | 33.9 C (93.0 F) |
| 1973 | 37.2 C (99.0 F) |
| 1974 | 33.3 C (91.9 F) |
| 1975 | 36.7 C (98.1 F) |
| 1976 | 34.4 C (93.9 F) |
| 1977 | 35.6 C (96.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1890 | n/a |
| 1891 | n/a |
| 1892 | n/a |
| 1893 | n/a |
| 1894 | -21.1 C (-6.0 F) |
| 1895 | -26.1 C (-15.0 F) |
| 1896 | -21.7 C (-7.1 F) |
| 1897 | -18.9 C (-2.0 F) |
| 1898 | -18.9 C (-2.0 F) |
| 1899 | -29.4 C (-20.9 F) |
| 1900 | -20.6 C (-5.1 F) |
| 1901 | -18.9 C (-2.0 F) |
| 1902 | -17.8 C (0.0 F) |
| 1903 | -20.6 C (-5.1 F) |
| 1904 | -28.9 C (-20.0 F) |
| 1905 | -22.8 C (-9.0 F) |
| 1906 | -22.2 C (-8.0 F) |
| 1907 | -24.4 C (-11.9 F) |
| 1908 | -24.4 C (-11.9 F) |
| 1909 | -22.8 C (-9.0 F) |
| 1910 | -20.0 C (-4.0 F) |
| 1911 | -15.0 C (5.0 F) |
| 1912 | -30.0 C (-22.0 F) |
| 1913 | -15.0 C (5.0 F) |
| 1914 | -25.6 C (-14.1 F) |
| 1915 | -20.6 C (-5.1 F) |
| 1916 | -21.7 C (-7.1 F) |
| 1917 | -26.1 C (-15.0 F) |
| 1918 | -25.6 C (-14.1 F) |
| 1919 | -21.1 C (-6.0 F) |
| 1920 | -21.1 C (-6.0 F) |
| 1921 | -21.7 C (-7.1 F) |
| 1922 | -5.6 C (21.9 F) |
| 1923 | -18.3 C (-0.9 F) |
| 1924 | -22.2 C (-8.0 F) |
| 1925 | -28.3 C (-18.9 F) |
| 1926 | -21.7 C (-7.1 F) |
| 1927 | -20.6 C (-5.1 F) |
| 1928 | -20.0 C (-4.0 F) |
| 1929 | -17.2 C (1.0 F) |
| 1930 | -18.9 C (-2.0 F) |
| 1931 | -18.9 C (-2.0 F) |
| 1932 | -17.2 C (1.0 F) |
| 1933 | -18.9 C (-2.0 F) |
| 1934 | -26.7 C (-16.1 F) |
| 1935 | -22.8 C (-9.0 F) |
| 1936 | -24.4 C (-11.9 F) |
| 1937 | -16.7 C (1.9 F) |
| 1938 | -17.2 C (1.0 F) |
| 1939 | -16.1 C (3.0 F) |
| 1940 | -17.8 C (0.0 F) |
| 1941 | -17.2 C (1.0 F) |
| 1942 | -26.1 C (-15.0 F) |
| 1943 | -22.2 C (-8.0 F) |
| 1944 | -22.2 C (-8.0 F) |
| 1945 | -23.3 C (-9.9 F) |
| 1946 | -20.6 C (-5.1 F) |
| 1947 | -17.8 C (0.0 F) |
| 1948 | -24.4 C (-11.9 F) |
| 1949 | -17.2 C (1.0 F) |
| 1950 | -25.0 C (-13.0 F) |
| 1951 | -23.9 C (-11.0 F) |
| 1952 | -16.7 C (1.9 F) |
| 1953 | -15.0 C (5.0 F) |
| 1954 | -19.4 C (-2.9 F) |
| 1955 | -23.3 C (-9.9 F) |
| 1956 | -15.0 C (5.0 F) |
| 1957 | -22.8 C (-9.0 F) |
| 1958 | -20.0 C (-4.0 F) |
| 1959 | -18.9 C (-2.0 F) |
| 1960 | -23.9 C (-11.0 F) |
| 1961 | -28.3 C (-18.9 F) |
| 1962 | -21.7 C (-7.1 F) |
| 1963 | -25.6 C (-14.1 F) |
| 1964 | -23.3 C (-9.9 F) |
| 1965 | -22.2 C (-8.0 F) |
| 1966 | -21.1 C (-6.0 F) |
| 1967 | -25.0 C (-13.0 F) |
| 1968 | -26.1 C (-15.0 F) |
| 1969 | -21.1 C (-6.0 F) |
| 1970 | -22.8 C (-9.0 F) |
| 1971 | 1.7 C (35.1 F) |
| 1972 | -19.4 C (-2.9 F) |
| 1973 | -20.0 C (-4.0 F) |
| 1974 | -15.6 C (3.9 F) |
| 1975 | -18.9 C (-2.0 F) |
| 1976 | -20.0 C (-4.0 F) |
| 1977 | -23.3 C (-9.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1890 | 13.5 mm (0.5 in) |
| 1891 | 45.7 mm (1.8 in) |
| 1892 | 56.4 mm (2.2 in) |
| 1893 | 67.3 mm (2.6 in) |
| 1894 | 51.6 mm (2.0 in) |
| 1895 | 64.8 mm (2.6 in) |
| 1896 | 87.4 mm (3.4 in) |
| 1897 | 46.5 mm (1.8 in) |
| 1898 | 44.5 mm (1.8 in) |
| 1899 | 91.4 mm (3.6 in) |
| 1900 | 51.1 mm (2.0 in) |
| 1901 | 52.6 mm (2.1 in) |
| 1902 | 49.8 mm (2.0 in) |
| 1903 | 45.5 mm (1.8 in) |
| 1904 | 47.0 mm (1.9 in) |
| 1905 | 64.8 mm (2.6 in) |
| 1906 | 50.3 mm (2.0 in) |
| 1907 | 50.8 mm (2.0 in) |
| 1908 | 35.6 mm (1.4 in) |
| 1909 | 40.6 mm (1.6 in) |
| 1910 | 38.1 mm (1.5 in) |
| 1911 | 58.4 mm (2.3 in) |
| 1912 | 42.2 mm (1.7 in) |
| 1913 | 50.8 mm (2.0 in) |
| 1914 | 50.8 mm (2.0 in) |
| 1915 | 51.3 mm (2.0 in) |
| 1916 | 76.2 mm (3.0 in) |
| 1917 | 64.0 mm (2.5 in) |
| 1918 | 59.9 mm (2.4 in) |
| 1919 | 50.3 mm (2.0 in) |
| 1920 | 40.1 mm (1.6 in) |
| 1921 | 41.9 mm (1.6 in) |
| 1922 | 15.0 mm (0.6 in) |
| 1923 | 58.4 mm (2.3 in) |
| 1924 | 51.6 mm (2.0 in) |
| 1925 | 40.1 mm (1.6 in) |
| 1926 | 111.8 mm (4.4 in) |
| 1927 | 43.4 mm (1.7 in) |
| 1928 | 44.5 mm (1.8 in) |
| 1929 | 71.9 mm (2.8 in) |
| 1930 | 36.8 mm (1.4 in) |
| 1931 | 49.3 mm (1.9 in) |
| 1932 | 62.5 mm (2.5 in) |
| 1933 | 111.0 mm (4.4 in) |
| 1934 | 66.5 mm (2.6 in) |
| 1935 | 53.8 mm (2.1 in) |
| 1936 | 49.3 mm (1.9 in) |
| 1937 | 56.9 mm (2.2 in) |
| 1938 | 37.6 mm (1.5 in) |
| 1939 | 75.2 mm (3.0 in) |
| 1940 | 48.0 mm (1.9 in) |
| 1941 | 120.1 mm (4.7 in) |
| 1942 | 55.4 mm (2.2 in) |
| 1943 | 54.6 mm (2.1 in) |
| 1944 | 42.2 mm (1.7 in) |
| 1945 | 54.1 mm (2.1 in) |
| 1946 | 94.5 mm (3.7 in) |
| 1947 | 37.6 mm (1.5 in) |
| 1948 | 45.7 mm (1.8 in) |
| 1949 | 45.0 mm (1.8 in) |
| 1950 | 64.5 mm (2.5 in) |
| 1951 | 46.0 mm (1.8 in) |
| 1952 | 54.1 mm (2.1 in) |
| 1953 | 61.0 mm (2.4 in) |
| 1954 | 51.8 mm (2.0 in) |
| 1955 | 59.9 mm (2.4 in) |
| 1956 | 42.7 mm (1.7 in) |
| 1957 | 39.9 mm (1.6 in) |
| 1958 | 109.2 mm (4.3 in) |
| 1959 | 59.7 mm (2.4 in) |
| 1960 | 69.3 mm (2.7 in) |
| 1961 | 50.8 mm (2.0 in) |
| 1962 | 62.0 mm (2.4 in) |
| 1963 | 64.5 mm (2.5 in) |
| 1964 | 51.6 mm (2.0 in) |
| 1965 | 52.6 mm (2.1 in) |
| 1966 | 61.2 mm (2.4 in) |
| 1967 | 42.7 mm (1.7 in) |
| 1968 | 48.3 mm (1.9 in) |
| 1969 | 63.8 mm (2.5 in) |
| 1970 | 37.6 mm (1.5 in) |
| 1971 | 27.2 mm (1.1 in) |
| 1972 | 36.3 mm (1.4 in) |
| 1973 | 55.4 mm (2.2 in) |
| 1974 | 69.3 mm (2.7 in) |
| 1975 | 104.1 mm (4.1 in) |
| 1976 | 32.0 mm (1.3 in) |
| 1977 | 44.7 mm (1.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1890 | 23.4 mm (0.9 in) |
| 1891 | 69.1 mm (2.7 in) |
| 1892 | 87.9 mm (3.5 in) |
| 1893 | 80.0 mm (3.1 in) |
| 1894 | 112.1 mm (4.4 in) |
| 1895 | 70.1 mm (2.8 in) |
| 1896 | 98.9 mm (3.9 in) |
| 1897 | 78.1 mm (3.1 in) |
| 1898 | 100.6 mm (4.0 in) |
| 1899 | 117.9 mm (4.6 in) |
| 1900 | 92.8 mm (3.7 in) |
| 1901 | 93.8 mm (3.7 in) |
| 1902 | 105.1 mm (4.1 in) |
| 1903 | 64.4 mm (2.5 in) |
| 1904 | 71.3 mm (2.8 in) |
| 1905 | 101.9 mm (4.0 in) |
| 1906 | 77.0 mm (3.0 in) |
| 1907 | 98.3 mm (3.9 in) |
| 1908 | 55.1 mm (2.2 in) |
| 1909 | 70.7 mm (2.8 in) |
| 1910 | 68.9 mm (2.7 in) |
| 1911 | 102.9 mm (4.1 in) |
| 1912 | 67.4 mm (2.7 in) |
| 1913 | 79.3 mm (3.1 in) |
| 1914 | 97.8 mm (3.9 in) |
| 1915 | 56.4 mm (2.2 in) |
| 1916 | 105.7 mm (4.2 in) |
| 1917 | 64.0 mm (2.5 in) |
| 1918 | 90.2 mm (3.6 in) |
| 1919 | 128.0 mm (5.0 in) |
| 1920 | 67.5 mm (2.7 in) |
| 1921 | 75.2 mm (3.0 in) |
| 1922 | 34.6 mm (1.4 in) |
| 1923 | 47.0 mm (1.9 in) |
| 1924 | 51.6 mm (2.0 in) |
| 1925 | 43.9 mm (1.7 in) |
| 1926 | 116.4 mm (4.6 in) |
| 1927 | 71.8 mm (2.8 in) |
| 1928 | 84.5 mm (3.3 in) |
| 1929 | 99.6 mm (3.9 in) |
| 1930 | 88.1 mm (3.5 in) |
| 1931 | 92.4 mm (3.6 in) |
| 1932 | 106.7 mm (4.2 in) |
| 1933 | 125.7 mm (4.9 in) |
| 1934 | 93.6 mm (3.7 in) |
| 1935 | 62.2 mm (2.4 in) |
| 1936 | 61.5 mm (2.4 in) |
| 1937 | 70.8 mm (2.8 in) |
| 1938 | 70.6 mm (2.8 in) |
| 1939 | 86.6 mm (3.4 in) |
| 1940 | 77.4 mm (3.0 in) |
| 1941 | 137.9 mm (5.4 in) |
| 1942 | 104.4 mm (4.1 in) |
| 1943 | 97.6 mm (3.8 in) |
| 1944 | 82.6 mm (3.3 in) |
| 1945 | 80.3 mm (3.2 in) |
| 1946 | 126.2 mm (5.0 in) |
| 1947 | 73.1 mm (2.9 in) |
| 1948 | 56.4 mm (2.2 in) |
| 1949 | 63.9 mm (2.5 in) |
| 1950 | 97.2 mm (3.8 in) |
| 1951 | 102.3 mm (4.0 in) |
| 1952 | 103.7 mm (4.1 in) |
| 1953 | 78.8 mm (3.1 in) |
| 1954 | 81.8 mm (3.2 in) |
| 1955 | 139.1 mm (5.5 in) |
| 1956 | 64.8 mm (2.6 in) |
| 1957 | 79.7 mm (3.1 in) |
| 1958 | 115.8 mm (4.6 in) |
| 1959 | 82.4 mm (3.2 in) |
| 1960 | 99.2 mm (3.9 in) |
| 1961 | 73.6 mm (2.9 in) |
| 1962 | 76.0 mm (3.0 in) |
| 1963 | 67.3 mm (2.6 in) |
| 1964 | 87.2 mm (3.4 in) |
| 1965 | 56.4 mm (2.2 in) |
| 1966 | 84.9 mm (3.3 in) |
| 1967 | 62.7 mm (2.5 in) |
| 1968 | 73.4 mm (2.9 in) |
| 1969 | 92.5 mm (3.6 in) |
| 1970 | 75.7 mm (3.0 in) |
| 1971 | 50.1 mm (2.0 in) |
| 1972 | 68.6 mm (2.7 in) |
| 1973 | 70.6 mm (2.8 in) |
| 1974 | 89.7 mm (3.5 in) |
| 1975 | 168.4 mm (6.6 in) |
| 1976 | 71.1 mm (2.8 in) |
| 1977 | 69.3 mm (2.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1890 | 11 days |
| 1891 | 10 days |
| 1892 | 6 days |
| 1893 | 15 days |
| 1894 | 17 days |
| 1895 | 14 days |
| 1896 | 13 days |
| 1897 | 15 days |
| 1898 | 14 days |
| 1899 | 16 days |
| 1900 | 24 days |
| 1901 | 17 days |
| 1902 | 16 days |
| 1903 | 17 days |
| 1904 | 14 days |
| 1905 | 18 days |
| 1906 | 12 days |
| 1907 | 13 days |
| 1908 | 14 days |
| 1909 | 23 days |
| 1910 | 14 days |
| 1911 | 13 days |
| 1912 | 19 days |
| 1913 | 18 days |
| 1914 | 14 days |
| 1915 | 13 days |
| 1916 | 13 days |
| 1917 | 22 days |
| 1918 | 19 days |
| 1919 | 19 days |
| 1920 | 13 days |
| 1921 | 14 days |
| 1922 | 8 days |
| 1923 | 10 days |
| 1924 | 22 days |
| 1925 | 13 days |
| 1926 | 13 days |
| 1927 | 14 days |
| 1928 | 17 days |
| 1929 | 18 days |
| 1930 | 21 days |
| 1931 | 14 days |
| 1932 | 18 days |
| 1933 | 12 days |
| 1934 | 28 days |
| 1935 | 19 days |
| 1936 | 18 days |
| 1937 | 10 days |
| 1938 | 13 days |
| 1939 | 17 days |
| 1940 | 17 days |
| 1941 | 24 days |
| 1942 | 19 days |
| 1943 | 24 days |
| 1944 | 21 days |
| 1945 | 15 days |
| 1946 | 14 days |
| 1947 | 26 days |
| 1948 | 11 days |
| 1949 | 19 days |
| 1950 | 15 days |
| 1951 | 12 days |
| 1952 | 14 days |
| 1953 | 18 days |
| 1954 | 12 days |
| 1955 | 15 days |
| 1956 | 15 days |
| 1957 | 16 days |
| 1958 | 16 days |
| 1959 | 15 days |
| 1960 | 18 days |
| 1961 | 15 days |
| 1962 | 15 days |
| 1963 | 31 days |
| 1964 | 22 days |
| 1965 | 14 days |
| 1966 | 21 days |
| 1967 | 19 days |
| 1968 | 26 days |
| 1969 | 17 days |
| 1970 | 11 days |
| 1971 | 11 days |
| 1972 | 14 days |
| 1973 | 15 days |
| 1974 | 11 days |
| 1975 | 14 days |
| 1976 | 19 days |
| 1977 | 13 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
64 years with a frostAcross 64 years with a frost, the median last spring frost at Lock Haven falls on 3 May and the median first autumn frost on 7 October, which leaves a median of 159 days between them.
In 1939 to 1974 the median growing season was 152 days. That is 13 days fewer than in 1896 to 1933.
Fitted over all years, the growing season changes by -3.4 days per decade at this station.
| Measure | Median, all years | Earliest period (1896 to 1933) | Recent period (1939 to 1974) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 3 May | 28 April | 7 May | 9 days later | +2.1 days per decade |
| First autumn frost | 7 October | 10 October | 5 October | 5 days earlier | -1.3 days per decade |
| Growing days | 159 days | 165 days | 152 days | 13 days fewer | -3.4 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
72 years, 1893 to 1976A day with at least 53.2 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 126.7 mm (5.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 53.2 mm (2.1 in) | |
| 5 years | 68.1 mm (2.7 in) | |
| 10 years | 79.6 mm (3.1 in) | |
| 25 years | 96.4 mm (3.8 in) | |
| 50 years | 110.7 mm (4.4 in) | |
| 100 years | 126.7 mm (5.0 in) | Longer than the 72 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, 72 years of values from 1893 to 1976.
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: 120.1 mm (4.7 in) in 1941; 111.0 mm (4.4 in) in 1933; 109.2 mm (4.3 in) in 1958.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Lock Haven, at 1941. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1941 ran 0.4 C (0.7 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1941 | -0.4 | -0.7 | 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).