London State Fish Hatchery Weather Records (USC00334681)
Record envelope, standing records and threshold days for London State Fish Hatchery (USC00334681), Ohio, United States, with 109 years of record.
Key Facts for London State Fish Hatchery
- London State Fish Hatchery (USC00334681) is a weather station in Ohio, United States at 39.90 latitude and -83.51 longitude, 341 m (1,120 ft) above sea level.
- The station reports from 1918 to 2026, 109 years of record.
- 1,464 records set at London State Fish Hatchery still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- London State Fish Hatchery set a daily record high minimum temperature of 21.1 C (70.0 F) on 18 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Ohio, United States, 39.90 latitude, -83.51 longitude.
- Elevation: 341 m (1,120 ft).
- Period of record: 1918 to 2026, 109 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
9 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 22.2 C (72.0 F) | -31.1 C (-24.0 F) | 17.8 C (64.0 F) | -22.8 C (-9.0 F) |
| Feb | 23.3 C (73.9 F) | -28.3 C (-18.9 F) | 19.4 C (66.9 F) | -21.7 C (-7.1 F) |
| Mar | 29.4 C (84.9 F) | -25.6 C (-14.1 F) | 29.4 C (84.9 F) | -6.7 C (19.9 F) |
| Apr | 31.7 C (89.1 F) | -11.1 C (12.0 F) | 28.3 C (82.9 F) | -1.7 C (28.9 F) |
| May | 33.9 C (93.0 F) | -5.0 C (23.0 F) | 31.1 C (88.0 F) | 0.0 C (32.0 F) |
| Jun | 38.9 C (102.0 F) | 1.7 C (35.1 F) | 32.2 C (90.0 F) | 10.0 C (50.0 F) |
| Jul | 42.8 C (109.0 F) | 5.6 C (42.1 F) | 34.4 C (93.9 F) | 10.6 C (51.1 F) |
| Aug | 38.9 C (102.0 F) | 2.8 C (37.0 F) | 30.6 C (87.1 F) | 11.7 C (53.1 F) |
| Sep | 38.9 C (102.0 F) | -2.2 C (28.0 F) | 35.0 C (95.0 F) | 4.4 C (39.9 F) |
| Oct | 33.3 C (91.9 F) | -9.4 C (15.1 F) | 30.6 C (87.1 F) | 1.7 C (35.1 F) |
| Nov | 26.7 C (80.1 F) | -18.3 C (-0.9 F) | n/a | n/a |
| Dec | 23.3 C (73.9 F) | -27.8 C (-18.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1918 | 19 |
| 1919 | 9 |
| 1920 | 17 |
| 1921 | 10 |
| 1922 | 9 |
| 1923 | 15 |
| 1924 | 18 |
| 1925 | 33 |
| 1926 | 6 |
| 1927 | 15 |
| 1928 | 7 |
| 1929 | 25 |
| 1930 | 24 |
| 1931 | 21 |
| 1932 | 13 |
| 1933 | 24 |
| 1934 | 35 |
| 1935 | 14 |
| 1936 | 44 |
| 1937 | 13 |
| 1938 | 8 |
| 1939 | 17 |
| 1940 | 25 |
| 1941 | 12 |
| 1942 | 18 |
| 1943 | 16 |
| 1944 | 17 |
| 1945 | 14 |
| 1946 | 9 |
| 1947 | 18 |
| 1948 | 13 |
| 1949 | 8 |
| 1950 | 25 |
| 1951 | 18 |
| 1952 | 11 |
| 1953 | 13 |
| 1954 | 18 |
| 1955 | 8 |
| 1956 | 3 |
| 1957 | 9 |
| 1958 | 16 |
| 1959 | 13 |
| 1960 | 13 |
| 1961 | 10 |
| 1962 | 21 |
| 1963 | 25 |
| 1964 | 19 |
| 1965 | 14 |
| 1966 | 13 |
| 1967 | 19 |
| 1968 | 9 |
| 1969 | 5 |
| 1970 | 15 |
| 1971 | 10 |
| 1972 | 13 |
| 1973 | 14 |
| 1974 | 19 |
| 1975 | 8 |
| 1976 | 19 |
| 1977 | 33 |
| 1978 | 7 |
| 1979 | 11 |
| 1980 | 14 |
| 1981 | 11 |
| 1982 | 23 |
| 1983 | 13 |
| 1984 | 14 |
| 1985 | 15 |
| 1986 | 18 |
| 1987 | 7 |
| 1988 | 20 |
| 1989 | 20 |
| 1990 | 11 |
| 1991 | 20 |
| 1992 | 7 |
| 1993 | 7 |
| 1994 | 11 |
| 1995 | 11 |
| 1996 | 14 |
| 1997 | 12 |
| 1998 | 10 |
| 1999 | 8 |
| 2000 | 13 |
| 2001 | 3 |
| 2002 | 14 |
| 2003 | 8 |
| 2004 | 1 |
| 2011 | 9 |
| 2012 | 12 |
| 2013 | 9 |
| 2014 | 23 |
| 2015 | 21 |
| 2016 | 6 |
| 2017 | 12 |
| 2018 | 19 |
| 2019 | 14 |
| 2020 | 8 |
| 2021 | 6 |
| 2022 | 5 |
| 2023 | 6 |
| 2024 | 13 |
| 2025 | 7 |
| 2026 | 12 |
All-Time Record Progression
15 new records| Date | Kind | Detail |
|---|---|---|
| 1969-08-09 | Record daily precipitation | Record daily precipitation 103.4 mm (4.1 in) |
| 1977-01-17 | Record low minimum temperature | Record low minimum temperature -28.9 C (-20.0 F) |
| 1978-01-17 | Record snow depth | Record snow depth 35.6 cm (14.0 in) |
| 1978-01-18 | Record snow depth | Record snow depth 38.1 cm (15.0 in) |
| 1978-01-20 | Record snow depth | Record snow depth 45.7 cm (18.0 in) |
| 1978-01-25 | Record daily snowfall | Record daily snowfall 30.5 cm (12.0 in) |
| 1978-01-27 | Record snow depth | Record snow depth 48.3 cm (19.0 in) |
| 1979-09-14 | Record daily precipitation | Record daily precipitation 120.9 mm (4.8 in) |
| 1982-01-17 | Record low maximum temperature | Record low maximum temperature -20.0 C (-4.0 F) |
| 1982-01-17 | Record low minimum temperature | Record low minimum temperature -30.6 C (-23.1 F) |
| 1985-02-10 | Record snow depth | Record snow depth 50.8 cm (20.0 in) |
| 1985-02-11 | Record snow depth | Record snow depth 53.3 cm (21.0 in) |
| 1994-01-19 | Record low maximum temperature | Record low maximum temperature -23.3 C (-9.9 F) |
| 1994-01-19 | Record low minimum temperature | Record low minimum temperature -31.1 C (-24.0 F) |
| 1996-01-12 | Record snow depth | Record snow depth 61.0 cm (24.0 in) |
Wettest Day of Each Month
Sep: 120.9 mm (4.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 88.1 mm (3.5 in) | 21 January 1959 |
| Feb | 55.4 mm (2.2 in) | 23 February 1975 |
| Mar | 90.4 mm (3.6 in) | 9 March 1964 |
| Apr | 62.0 mm (2.4 in) | 30 April 2017 |
| May | 62.5 mm (2.5 in) | 25 May 1947 |
| Jun | 99.6 mm (3.9 in) | 27 June 1932 |
| Jul | 98.0 mm (3.9 in) | 11 July 2017 |
| Aug | 108.0 mm (4.3 in) | 6 August 1995 |
| Sep | 120.9 mm (4.8 in) | 14 September 1979 |
| Oct | 108.0 mm (4.3 in) | 8 October 2025 |
| Nov | 87.1 mm (3.4 in) | 6 November 2017 |
| Dec | 68.8 mm (2.7 in) | 22 December 2013 |
Period of Record Coverage
1918 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1918 | 258 | 71% | No |
| 1919 | 363 | 99% | Yes |
| 1920 | 364 | 99% | Yes |
| 1921 | 362 | 99% | Yes |
| 1922 | 364 | 100% | Yes |
| 1923 | 348 | 95% | Yes |
| 1924 | 364 | 99% | Yes |
| 1925 | 331 | 91% | Yes |
| 1926 | 360 | 99% | Yes |
| 1927 | 347 | 95% | Yes |
| 1928 | 324 | 89% | No |
| 1929 | 283 | 78% | No |
| 1930 | 353 | 97% | Yes |
| 1931 | 356 | 98% | Yes |
| 1932 | 365 | 100% | Yes |
| 1933 | 360 | 99% | Yes |
| 1934 | 330 | 90% | Yes |
| 1935 | 355 | 97% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 364 | 100% | Yes |
| 1938 | 363 | 99% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 365 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 363 | 99% | Yes |
| 1944 | 365 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 363 | 99% | 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 | 364 | 100% | Yes |
| 1958 | 359 | 98% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 361 | 99% | Yes |
| 1961 | 362 | 99% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 361 | 99% | Yes |
| 1968 | 363 | 99% | Yes |
| 1969 | 362 | 99% | Yes |
| 1970 | 361 | 99% | Yes |
| 1971 | 360 | 99% | Yes |
| 1972 | 360 | 98% | Yes |
| 1973 | 358 | 98% | Yes |
| 1974 | 353 | 97% | Yes |
| 1975 | 352 | 96% | Yes |
| 1976 | 360 | 98% | Yes |
| 1977 | 360 | 99% | Yes |
| 1978 | 362 | 99% | Yes |
| 1979 | 363 | 99% | Yes |
| 1980 | 363 | 99% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 355 | 97% | Yes |
| 1983 | 357 | 98% | Yes |
| 1984 | 363 | 99% | Yes |
| 1985 | 354 | 97% | Yes |
| 1986 | 353 | 97% | Yes |
| 1987 | 352 | 96% | Yes |
| 1988 | 352 | 96% | Yes |
| 1989 | 351 | 96% | Yes |
| 1990 | 328 | 90% | No |
| 1991 | 340 | 93% | Yes |
| 1992 | 360 | 98% | Yes |
| 1993 | 362 | 99% | Yes |
| 1994 | 344 | 94% | Yes |
| 1995 | 360 | 99% | Yes |
| 1996 | 364 | 99% | Yes |
| 1997 | 358 | 98% | Yes |
| 1998 | 362 | 99% | Yes |
| 1999 | 355 | 97% | Yes |
| 2000 | 211 | 58% | No |
| 2001 | 117 | 32% | No |
| 2002 | 276 | 76% | No |
| 2003 | 266 | 73% | No |
| 2004 | 46 | 13% | No |
| 2011 | 357 | 98% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 349 | 96% | Yes |
| 2016 | 327 | 89% | No |
| 2017 | 361 | 99% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 269 | 74% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 18 September 2026 | London State Fish Hatchery, US | daily high min (Provisional) | 21.1 C (70.0 F) | 0.5 C (0.9 F) | 84 years | 36 of 100 (Notable) |
| 3 September 2026 | London State Fish Hatchery, US | daily high min (Provisional) | 21.7 C (71.1 F) | 0.6 C (1.1 F) | 72 years | 32 of 100 (Routine) |
| 2 September 2026 | London State Fish Hatchery, US | daily high min (Provisional) | 21.1 C (70.0 F) | 1.1 C (2.0 F) | 72 years | 33 of 100 (Routine) |
| 1 September 2026 | London State Fish Hatchery, US | daily high min (Tie, Provisional) | 21.7 C (71.1 F) | tie | 84 years | 8 of 100 (Routine) |
| 12 August 2026 | London State Fish Hatchery, US | daily rain (Tie) | 58.9 mm (2.3 in) | tie | 8 years | 3 of 100 (Routine) |
| 23 July 2026 | London State Fish Hatchery, US | daily low max | 21.1 C (70.0 F) | 1.1 C (2.0 F) | 7 years | 15 of 100 (Routine) |
| 4 July 2026 | London State Fish Hatchery, US | daily high max (Tie) | 34.4 C (93.9 F) | tie | 107 years | 10 of 100 (Routine) |
| 3 July 2026 | London State Fish Hatchery, US | daily high min (Tie) | 21.7 C (71.1 F) | tie | 56 years | 6 of 100 (Routine) |
| 11 June 2026 | London State Fish Hatchery, US | daily high min (Tie) | 22.2 C (72.0 F) | tie | 104 years | 10 of 100 (Routine) |
| 28 May 2026 | London State Fish Hatchery, US | daily rain | 45.0 mm (1.8 in) | 19.6 mm (0.8 in) | 87 years | 56 of 100 (Notable) |
| 23 May 2026 | London State Fish Hatchery, US | daily rain | 53.1 mm (2.1 in) | 9.9 mm (0.39 in) | 57 years | 37 of 100 (Notable) |
| 28 April 2026 | London State Fish Hatchery, US | daily rain | 33.8 mm (1.3 in) | 15.8 mm (0.6 in) | 67 years | 46 of 100 (Notable) |
| 16 April 2026 | London State Fish Hatchery, US | daily high min | 16.1 C (61.0 F) | 0.5 C (0.9 F) | 24 years | 17 of 100 (Routine) |
| 15 April 2026 | London State Fish Hatchery, US | monthly high min (Tie) | 17.2 C (63.0 F) | tie | 97 years | 12 of 100 (Routine) |
| 15 April 2026 | London State Fish Hatchery, US | daily high max | 28.3 C (82.9 F) | 1.1 C (2.0 F) | 1 year | 11 of 100 (Routine) |
| 14 April 2026 | London State Fish Hatchery, US | daily high min | 15.0 C (59.0 F) | 1.1 C (2.0 F) | 12 years | 15 of 100 (Routine) |
| 4 April 2026 | London State Fish Hatchery, US | daily high min | 16.1 C (61.0 F) | 2.2 C (4.0 F) | 40 years | 26 of 100 (Routine) |
| 3 April 2026 | London State Fish Hatchery, US | daily high max (Tie) | 26.1 C (79.0 F) | tie | 85 years | 8 of 100 (Routine) |
| 1 April 2026 | London State Fish Hatchery, US | daily high min | 14.4 C (57.9 F) | 1.6 C (2.9 F) | 48 years | 27 of 100 (Routine) |
| 27 March 2026 | London State Fish Hatchery, US | daily rain | 50.0 mm (2.0 in) | 8.1 mm (0.32 in) | 77 years | 41 of 100 (Notable) |
Climate Trend
87 complete years, 1919 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1919 | 11.2 C | +0.50 C |
| 1920 | 10.1 C | -0.64 C |
| 1921 | 12.5 C | +1.72 C |
| 1922 | 11.6 C | +0.83 C |
| 1923 | 10.8 C | +0.06 C |
| 1924 | 9.7 C | -1.05 C |
| 1926 | 9.5 C | -1.25 C |
| 1927 | 10.7 C | -0.08 C |
| 1930 | 10.7 C | -0.05 C |
| 1931 | 12.1 C | +1.34 C |
| 1932 | 11.0 C | +0.31 C |
| 1933 | 11.4 C | +0.66 C |
| 1935 | 10.7 C | -0.05 C |
| 1936 | 11.2 C | +0.42 C |
| 1937 | 10.5 C | -0.25 C |
| 1938 | 11.7 C | +0.96 C |
| 1939 | 11.6 C | +0.88 C |
| 1940 | 10.2 C | -0.58 C |
| 1941 | 11.4 C | +0.70 C |
| 1942 | 10.8 C | +0.06 C |
| 1943 | 10.0 C | -0.70 C |
| 1944 | 11.1 C | +0.40 C |
| 1945 | 10.0 C | -0.77 C |
| 1946 | 11.3 C | +0.60 C |
| 1947 | 10.0 C | -0.74 C |
| 1948 | 10.7 C | 0.00 C |
| 1949 | 11.8 C | +1.06 C |
| 1950 | 10.0 C | -0.70 C |
| 1951 | 10.6 C | -0.12 C |
| 1952 | 11.5 C | +0.80 C |
| 1953 | 11.9 C | +1.18 C |
| 1954 | 11.8 C | +1.04 C |
| 1955 | 11.2 C | +0.42 C |
| 1956 | 10.8 C | +0.08 C |
| 1957 | 10.4 C | -0.33 C |
| 1958 | 9.5 C | -1.21 C |
| 1959 | 11.3 C | +0.57 C |
| 1960 | 10.1 C | -0.67 C |
| 1961 | 10.5 C | -0.23 C |
| 1962 | 10.2 C | -0.53 C |
| 1963 | 9.8 C | -0.95 C |
| 1964 | 11.2 C | +0.51 C |
| 1965 | 11.1 C | +0.32 C |
| 1966 | 10.1 C | -0.62 C |
| 1967 | 10.4 C | -0.35 C |
| 1968 | 10.5 C | -0.24 C |
| 1969 | 10.2 C | -0.54 C |
| 1970 | 11.1 C | +0.37 C |
| 1971 | 10.9 C | +0.15 C |
| 1972 | 10.5 C | -0.24 C |
| 1973 | 12.0 C | +1.26 C |
| 1974 | 10.9 C | +0.15 C |
| 1975 | 11.4 C | +0.65 C |
| 1976 | 10.4 C | -0.38 C |
| 1978 | 9.7 C | -1.01 C |
| 1979 | 10.1 C | -0.59 C |
| 1980 | 10.4 C | -0.29 C |
| 1981 | 10.4 C | -0.32 C |
| 1982 | 10.7 C | -0.01 C |
| 1983 | 11.1 C | +0.41 C |
| 1984 | 10.7 C | -0.07 C |
| 1985 | 11.0 C | +0.30 C |
| 1986 | 11.9 C | +1.16 C |
| 1987 | 12.1 C | +1.37 C |
| 1988 | 11.0 C | +0.25 C |
| 1989 | 9.6 C | -1.09 C |
| 1992 | 9.9 C | -0.82 C |
| 1993 | 10.1 C | -0.62 C |
| 1995 | 9.6 C | -1.13 C |
| 1996 | 9.1 C | -1.59 C |
| 1997 | 9.5 C | -1.24 C |
| 1998 | 11.6 C | +0.85 C |
| 1999 | 10.6 C | -0.10 C |
| 2011 | 10.5 C | -0.19 C |
| 2012 | 11.2 C | +0.43 C |
| 2013 | 9.4 C | -1.29 C |
| 2014 | 8.4 C | -2.36 C |
| 2015 | 9.8 C | -0.95 C |
| 2017 | 11.0 C | +0.31 C |
| 2018 | 10.5 C | -0.28 C |
| 2019 | 10.7 C | -0.06 C |
| 2020 | 11.0 C | +0.29 C |
| 2021 | 11.2 C | +0.46 C |
| 2022 | 10.5 C | -0.19 C |
| 2023 | 11.9 C | +1.18 C |
| 2024 | 12.8 C | +2.11 C |
| 2025 | 11.3 C | +0.53 C |
The fitted trend in annual mean temperature here over 1919 to 2025 is -0.03 C (-0.08 to 0.03) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.2 to 0.1) per decade. The slope is a straight line fitted to 87 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.03 C (-0.08 to 0.03) per decade | -0.1 F (-0.2 to 0.1) per decade | 1919 to 2025 | 87 | Not clearly different from zero |
| Mean daily maximum | -0.04 C (-0.10 to 0.03) per decade | -0.06 F (-0.17 to 0.05) per decade | 1919 to 2025 | 87 | Not clearly different from zero |
| Mean daily minimum | -0.02 C (-0.08 to 0.04) per decade | -0.04 F (-0.15 to 0.07) per decade | 1919 to 2025 | 87 | 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
1918 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 42.8 C (109.0 F) | 1936 | 35.0 C (95.0 F) | 103 |
| Coldest night (TNn) | -31.1 C (-24.0 F) | 1994 | -21.7 C (-7.1 F) | 103 |
| Wettest day (Rx1day) | 120.9 mm (4.8 in) | 1979 | 56.1 mm (2.2 in) | 103 |
| Wettest five days (Rx5day) | 174.5 mm (6.9 in) | 1958 | 88.6 mm (3.5 in) | 103 |
| Longest dry spell (CDD) | 44 days | 1963 | 17 days | 103 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1918 | 37.8 C (100.0 F) |
| 1919 | 34.4 C (93.9 F) |
| 1920 | 33.3 C (91.9 F) |
| 1921 | 34.4 C (93.9 F) |
| 1922 | 33.9 C (93.0 F) |
| 1923 | 35.6 C (96.1 F) |
| 1924 | 35.6 C (96.1 F) |
| 1925 | 38.3 C (100.9 F) |
| 1926 | 36.7 C (98.1 F) |
| 1927 | 33.3 C (91.9 F) |
| 1928 | 32.8 C (91.0 F) |
| 1929 | 33.3 C (91.9 F) |
| 1930 | 39.4 C (102.9 F) |
| 1931 | 37.8 C (100.0 F) |
| 1932 | 37.8 C (100.0 F) |
| 1933 | 38.3 C (100.9 F) |
| 1934 | 41.7 C (107.1 F) |
| 1935 | 33.9 C (93.0 F) |
| 1936 | 42.8 C (109.0 F) |
| 1937 | 33.3 C (91.9 F) |
| 1938 | 33.3 C (91.9 F) |
| 1939 | 38.3 C (100.9 F) |
| 1940 | 36.7 C (98.1 F) |
| 1941 | 37.2 C (99.0 F) |
| 1942 | 35.6 C (96.1 F) |
| 1943 | 35.0 C (95.0 F) |
| 1944 | 37.8 C (100.0 F) |
| 1945 | 35.6 C (96.1 F) |
| 1946 | 34.4 C (93.9 F) |
| 1947 | 33.9 C (93.0 F) |
| 1948 | 37.8 C (100.0 F) |
| 1949 | 33.9 C (93.0 F) |
| 1950 | 34.4 C (93.9 F) |
| 1951 | 38.3 C (100.9 F) |
| 1952 | 36.1 C (97.0 F) |
| 1953 | 38.9 C (102.0 F) |
| 1954 | 38.3 C (100.9 F) |
| 1955 | 35.6 C (96.1 F) |
| 1956 | 36.1 C (97.0 F) |
| 1957 | 35.0 C (95.0 F) |
| 1958 | 32.8 C (91.0 F) |
| 1959 | 33.9 C (93.0 F) |
| 1960 | 33.9 C (93.0 F) |
| 1961 | 33.9 C (93.0 F) |
| 1962 | 36.1 C (97.0 F) |
| 1963 | 35.0 C (95.0 F) |
| 1964 | 35.6 C (96.1 F) |
| 1965 | 35.6 C (96.1 F) |
| 1966 | 35.6 C (96.1 F) |
| 1967 | 33.3 C (91.9 F) |
| 1968 | 33.9 C (93.0 F) |
| 1969 | 33.3 C (91.9 F) |
| 1970 | 35.0 C (95.0 F) |
| 1971 | 34.4 C (93.9 F) |
| 1972 | 35.6 C (96.1 F) |
| 1973 | 34.4 C (93.9 F) |
| 1974 | 32.2 C (90.0 F) |
| 1975 | 33.9 C (93.0 F) |
| 1976 | 34.4 C (93.9 F) |
| 1977 | 36.7 C (98.1 F) |
| 1978 | 35.6 C (96.1 F) |
| 1979 | 32.2 C (90.0 F) |
| 1980 | 36.1 C (97.0 F) |
| 1981 | 35.0 C (95.0 F) |
| 1982 | 33.3 C (91.9 F) |
| 1983 | 38.3 C (100.9 F) |
| 1984 | 33.9 C (93.0 F) |
| 1985 | 33.9 C (93.0 F) |
| 1986 | 33.3 C (91.9 F) |
| 1987 | 35.0 C (95.0 F) |
| 1988 | 38.9 C (102.0 F) |
| 1989 | 34.4 C (93.9 F) |
| 1990 | 33.9 C (93.0 F) |
| 1991 | 36.1 C (97.0 F) |
| 1992 | 32.2 C (90.0 F) |
| 1993 | 35.0 C (95.0 F) |
| 1994 | 36.1 C (97.0 F) |
| 1995 | 35.6 C (96.1 F) |
| 1996 | 34.4 C (93.9 F) |
| 1997 | 35.0 C (95.0 F) |
| 1998 | 35.0 C (95.0 F) |
| 1999 | 35.0 C (95.0 F) |
| 2000 | 31.7 C (89.1 F) |
| 2001 | 31.1 C (88.0 F) |
| 2002 | 34.4 C (93.9 F) |
| 2003 | 32.2 C (90.0 F) |
| 2004 | 15.6 C (60.1 F) |
| 2011 | 34.4 C (93.9 F) |
| 2012 | 36.1 C (97.0 F) |
| 2013 | 33.3 C (91.9 F) |
| 2014 | 31.1 C (88.0 F) |
| 2015 | 32.2 C (90.0 F) |
| 2016 | 33.3 C (91.9 F) |
| 2017 | 32.2 C (90.0 F) |
| 2018 | 32.8 C (91.0 F) |
| 2019 | 33.9 C (93.0 F) |
| 2020 | 33.9 C (93.0 F) |
| 2021 | 33.3 C (91.9 F) |
| 2022 | 35.0 C (95.0 F) |
| 2023 | 32.2 C (90.0 F) |
| 2024 | 36.1 C (97.0 F) |
| 2025 | 35.0 C (95.0 F) |
| 2026 | 35.0 C (95.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1918 | -11.1 C (12.0 F) |
| 1919 | -17.8 C (0.0 F) |
| 1920 | -20.0 C (-4.0 F) |
| 1921 | -11.7 C (10.9 F) |
| 1922 | -20.6 C (-5.1 F) |
| 1923 | -21.1 C (-6.0 F) |
| 1924 | -24.4 C (-11.9 F) |
| 1925 | -22.8 C (-9.0 F) |
| 1926 | -24.4 C (-11.9 F) |
| 1927 | -18.9 C (-2.0 F) |
| 1928 | -21.1 C (-6.0 F) |
| 1929 | -21.7 C (-7.1 F) |
| 1930 | -26.1 C (-15.0 F) |
| 1931 | -13.3 C (8.1 F) |
| 1932 | -26.1 C (-15.0 F) |
| 1933 | -22.8 C (-9.0 F) |
| 1934 | -23.9 C (-11.0 F) |
| 1935 | -20.6 C (-5.1 F) |
| 1936 | -27.8 C (-18.0 F) |
| 1937 | -16.7 C (1.9 F) |
| 1938 | -18.9 C (-2.0 F) |
| 1939 | -19.4 C (-2.9 F) |
| 1940 | -26.7 C (-16.1 F) |
| 1941 | -16.7 C (1.9 F) |
| 1942 | -26.1 C (-15.0 F) |
| 1943 | -21.1 C (-6.0 F) |
| 1944 | -21.7 C (-7.1 F) |
| 1945 | -21.1 C (-6.0 F) |
| 1946 | -18.9 C (-2.0 F) |
| 1947 | -21.1 C (-6.0 F) |
| 1948 | -26.1 C (-15.0 F) |
| 1949 | -18.3 C (-0.9 F) |
| 1950 | -20.0 C (-4.0 F) |
| 1951 | -27.2 C (-17.0 F) |
| 1952 | -15.6 C (3.9 F) |
| 1953 | -21.1 C (-6.0 F) |
| 1954 | -16.1 C (3.0 F) |
| 1955 | -23.3 C (-9.9 F) |
| 1956 | -15.6 C (3.9 F) |
| 1957 | -24.4 C (-11.9 F) |
| 1958 | -26.7 C (-16.1 F) |
| 1959 | -22.8 C (-9.0 F) |
| 1960 | -22.2 C (-8.0 F) |
| 1961 | -26.7 C (-16.1 F) |
| 1962 | -23.3 C (-9.9 F) |
| 1963 | -27.2 C (-17.0 F) |
| 1964 | -22.2 C (-8.0 F) |
| 1965 | -25.0 C (-13.0 F) |
| 1966 | -22.2 C (-8.0 F) |
| 1967 | -20.6 C (-5.1 F) |
| 1968 | -23.3 C (-9.9 F) |
| 1969 | -21.1 C (-6.0 F) |
| 1970 | -22.8 C (-9.0 F) |
| 1971 | -20.6 C (-5.1 F) |
| 1972 | -25.0 C (-13.0 F) |
| 1973 | -18.9 C (-2.0 F) |
| 1974 | -17.8 C (0.0 F) |
| 1975 | -20.6 C (-5.1 F) |
| 1976 | -22.2 C (-8.0 F) |
| 1977 | -28.9 C (-20.0 F) |
| 1978 | -25.0 C (-13.0 F) |
| 1979 | -23.9 C (-11.0 F) |
| 1980 | -22.2 C (-8.0 F) |
| 1981 | -21.1 C (-6.0 F) |
| 1982 | -30.6 C (-23.1 F) |
| 1983 | -25.0 C (-13.0 F) |
| 1984 | -29.4 C (-20.9 F) |
| 1985 | -28.3 C (-18.9 F) |
| 1986 | -19.4 C (-2.9 F) |
| 1987 | -18.9 C (-2.0 F) |
| 1988 | -20.0 C (-4.0 F) |
| 1989 | -27.8 C (-18.0 F) |
| 1990 | -15.0 C (5.0 F) |
| 1991 | -17.2 C (1.0 F) |
| 1992 | -21.1 C (-6.0 F) |
| 1993 | -22.8 C (-9.0 F) |
| 1994 | -31.1 C (-24.0 F) |
| 1995 | -22.2 C (-8.0 F) |
| 1996 | -21.7 C (-7.1 F) |
| 1997 | -20.0 C (-4.0 F) |
| 1998 | -13.9 C (7.0 F) |
| 1999 | -23.3 C (-9.9 F) |
| 2000 | -26.1 C (-15.0 F) |
| 2001 | -12.8 C (9.0 F) |
| 2002 | -15.6 C (3.9 F) |
| 2003 | -27.2 C (-17.0 F) |
| 2004 | -22.2 C (-8.0 F) |
| 2011 | -22.8 C (-9.0 F) |
| 2012 | -16.1 C (3.0 F) |
| 2013 | -18.3 C (-0.9 F) |
| 2014 | -25.6 C (-14.1 F) |
| 2015 | -24.4 C (-11.9 F) |
| 2016 | -18.9 C (-2.0 F) |
| 2017 | -19.4 C (-2.9 F) |
| 2018 | -24.4 C (-11.9 F) |
| 2019 | -22.8 C (-9.0 F) |
| 2020 | -13.3 C (8.1 F) |
| 2021 | -19.4 C (-2.9 F) |
| 2022 | -17.8 C (0.0 F) |
| 2023 | -11.1 C (12.0 F) |
| 2024 | -15.6 C (3.9 F) |
| 2025 | -23.9 C (-11.0 F) |
| 2026 | -22.8 C (-9.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1918 | 38.1 mm (1.5 in) |
| 1919 | 25.4 mm (1.0 in) |
| 1920 | 54.9 mm (2.2 in) |
| 1921 | 56.1 mm (2.2 in) |
| 1922 | 45.7 mm (1.8 in) |
| 1923 | 82.6 mm (3.3 in) |
| 1924 | 71.1 mm (2.8 in) |
| 1925 | 76.2 mm (3.0 in) |
| 1926 | 40.6 mm (1.6 in) |
| 1927 | 50.8 mm (2.0 in) |
| 1928 | 48.3 mm (1.9 in) |
| 1929 | 48.3 mm (1.9 in) |
| 1930 | 34.3 mm (1.4 in) |
| 1931 | 73.7 mm (2.9 in) |
| 1932 | 99.6 mm (3.9 in) |
| 1933 | 40.6 mm (1.6 in) |
| 1934 | 40.6 mm (1.6 in) |
| 1935 | 61.0 mm (2.4 in) |
| 1936 | 48.3 mm (1.9 in) |
| 1937 | 56.9 mm (2.2 in) |
| 1938 | 57.2 mm (2.3 in) |
| 1939 | 72.4 mm (2.9 in) |
| 1940 | 55.9 mm (2.2 in) |
| 1941 | 45.7 mm (1.8 in) |
| 1942 | 42.9 mm (1.7 in) |
| 1943 | 66.3 mm (2.6 in) |
| 1944 | 69.3 mm (2.7 in) |
| 1945 | 67.3 mm (2.6 in) |
| 1946 | 65.5 mm (2.6 in) |
| 1947 | 83.6 mm (3.3 in) |
| 1948 | 49.5 mm (1.9 in) |
| 1949 | 39.4 mm (1.6 in) |
| 1950 | 43.2 mm (1.7 in) |
| 1951 | 35.8 mm (1.4 in) |
| 1952 | 72.9 mm (2.9 in) |
| 1953 | 76.7 mm (3.0 in) |
| 1954 | 44.7 mm (1.8 in) |
| 1955 | 77.5 mm (3.1 in) |
| 1956 | 32.0 mm (1.3 in) |
| 1957 | 63.5 mm (2.5 in) |
| 1958 | 65.5 mm (2.6 in) |
| 1959 | 88.1 mm (3.5 in) |
| 1960 | 40.9 mm (1.6 in) |
| 1961 | 69.1 mm (2.7 in) |
| 1962 | 45.2 mm (1.8 in) |
| 1963 | 72.4 mm (2.9 in) |
| 1964 | 90.4 mm (3.6 in) |
| 1965 | 67.3 mm (2.6 in) |
| 1966 | 62.0 mm (2.4 in) |
| 1967 | 55.9 mm (2.2 in) |
| 1968 | 51.1 mm (2.0 in) |
| 1969 | 103.4 mm (4.1 in) |
| 1970 | 62.0 mm (2.4 in) |
| 1971 | 80.8 mm (3.2 in) |
| 1972 | 39.4 mm (1.6 in) |
| 1973 | 63.5 mm (2.5 in) |
| 1974 | 32.3 mm (1.3 in) |
| 1975 | 55.4 mm (2.2 in) |
| 1976 | 35.1 mm (1.4 in) |
| 1977 | 33.0 mm (1.3 in) |
| 1978 | 49.0 mm (1.9 in) |
| 1979 | 120.9 mm (4.8 in) |
| 1980 | 68.6 mm (2.7 in) |
| 1981 | 51.6 mm (2.0 in) |
| 1982 | 47.0 mm (1.9 in) |
| 1983 | 58.4 mm (2.3 in) |
| 1984 | 47.2 mm (1.9 in) |
| 1985 | 50.8 mm (2.0 in) |
| 1986 | 42.7 mm (1.7 in) |
| 1987 | 50.8 mm (2.0 in) |
| 1988 | 92.5 mm (3.6 in) |
| 1989 | 77.7 mm (3.1 in) |
| 1990 | 57.2 mm (2.3 in) |
| 1991 | 43.4 mm (1.7 in) |
| 1992 | 67.3 mm (2.6 in) |
| 1993 | 65.0 mm (2.6 in) |
| 1994 | 30.5 mm (1.2 in) |
| 1995 | 108.0 mm (4.3 in) |
| 1996 | 59.4 mm (2.3 in) |
| 1997 | 50.8 mm (2.0 in) |
| 1998 | 79.8 mm (3.1 in) |
| 1999 | 70.4 mm (2.8 in) |
| 2000 | 60.2 mm (2.4 in) |
| 2001 | 48.3 mm (1.9 in) |
| 2002 | 75.7 mm (3.0 in) |
| 2003 | 43.2 mm (1.7 in) |
| 2004 | 49.8 mm (2.0 in) |
| 2011 | 63.2 mm (2.5 in) |
| 2012 | 43.7 mm (1.7 in) |
| 2013 | 68.8 mm (2.7 in) |
| 2014 | 44.2 mm (1.7 in) |
| 2015 | 61.2 mm (2.4 in) |
| 2016 | 56.4 mm (2.2 in) |
| 2017 | 98.0 mm (3.9 in) |
| 2018 | 48.5 mm (1.9 in) |
| 2019 | 54.6 mm (2.1 in) |
| 2020 | 49.5 mm (1.9 in) |
| 2021 | 72.4 mm (2.9 in) |
| 2022 | 41.4 mm (1.6 in) |
| 2023 | 48.5 mm (1.9 in) |
| 2024 | 33.3 mm (1.3 in) |
| 2025 | 108.0 mm (4.3 in) |
| 2026 | 58.9 mm (2.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1918 | 95.5 mm (3.8 in) |
| 1919 | 67.6 mm (2.7 in) |
| 1920 | 104.1 mm (4.1 in) |
| 1921 | 81.0 mm (3.2 in) |
| 1922 | 83.9 mm (3.3 in) |
| 1923 | 91.0 mm (3.6 in) |
| 1924 | 110.2 mm (4.3 in) |
| 1925 | 101.6 mm (4.0 in) |
| 1926 | 89.9 mm (3.5 in) |
| 1927 | 80.5 mm (3.2 in) |
| 1928 | 72.5 mm (2.9 in) |
| 1929 | 104.1 mm (4.1 in) |
| 1930 | 49.1 mm (1.9 in) |
| 1931 | 129.5 mm (5.1 in) |
| 1932 | 102.9 mm (4.1 in) |
| 1933 | 94.7 mm (3.7 in) |
| 1934 | 42.0 mm (1.7 in) |
| 1935 | 115.9 mm (4.6 in) |
| 1936 | 73.4 mm (2.9 in) |
| 1937 | 108.0 mm (4.3 in) |
| 1938 | 112.4 mm (4.4 in) |
| 1939 | 134.7 mm (5.3 in) |
| 1940 | 127.1 mm (5.0 in) |
| 1941 | 100.9 mm (4.0 in) |
| 1942 | 72.6 mm (2.9 in) |
| 1943 | 116.6 mm (4.6 in) |
| 1944 | 90.9 mm (3.6 in) |
| 1945 | 108.8 mm (4.3 in) |
| 1946 | 93.2 mm (3.7 in) |
| 1947 | 103.2 mm (4.1 in) |
| 1948 | 81.2 mm (3.2 in) |
| 1949 | 74.7 mm (2.9 in) |
| 1950 | 82.3 mm (3.2 in) |
| 1951 | 69.4 mm (2.7 in) |
| 1952 | 99.4 mm (3.9 in) |
| 1953 | 106.4 mm (4.2 in) |
| 1954 | 56.6 mm (2.2 in) |
| 1955 | 98.6 mm (3.9 in) |
| 1956 | 60.2 mm (2.4 in) |
| 1957 | 109.2 mm (4.3 in) |
| 1958 | 174.5 mm (6.9 in) |
| 1959 | 105.1 mm (4.1 in) |
| 1960 | 49.6 mm (2.0 in) |
| 1961 | 78.3 mm (3.1 in) |
| 1962 | 79.2 mm (3.1 in) |
| 1963 | 112.0 mm (4.4 in) |
| 1964 | 146.0 mm (5.7 in) |
| 1965 | 161.0 mm (6.3 in) |
| 1966 | 88.2 mm (3.5 in) |
| 1967 | 97.1 mm (3.8 in) |
| 1968 | 138.7 mm (5.5 in) |
| 1969 | 111.6 mm (4.4 in) |
| 1970 | 81.0 mm (3.2 in) |
| 1971 | 97.3 mm (3.8 in) |
| 1972 | 66.1 mm (2.6 in) |
| 1973 | 95.8 mm (3.8 in) |
| 1974 | 76.4 mm (3.0 in) |
| 1975 | 79.0 mm (3.1 in) |
| 1976 | 97.8 mm (3.9 in) |
| 1977 | 71.0 mm (2.8 in) |
| 1978 | 63.0 mm (2.5 in) |
| 1979 | 123.2 mm (4.9 in) |
| 1980 | 103.2 mm (4.1 in) |
| 1981 | 68.9 mm (2.7 in) |
| 1982 | 71.6 mm (2.8 in) |
| 1983 | 106.3 mm (4.2 in) |
| 1984 | 60.9 mm (2.4 in) |
| 1985 | 112.7 mm (4.4 in) |
| 1986 | 80.6 mm (3.2 in) |
| 1987 | 93.7 mm (3.7 in) |
| 1988 | 108.8 mm (4.3 in) |
| 1989 | 77.7 mm (3.1 in) |
| 1990 | 86.9 mm (3.4 in) |
| 1991 | 53.3 mm (2.1 in) |
| 1992 | 82.1 mm (3.2 in) |
| 1993 | 78.5 mm (3.1 in) |
| 1994 | 58.2 mm (2.3 in) |
| 1995 | 126.0 mm (5.0 in) |
| 1996 | 81.2 mm (3.2 in) |
| 1997 | 117.9 mm (4.6 in) |
| 1998 | 91.8 mm (3.6 in) |
| 1999 | 92.0 mm (3.6 in) |
| 2000 | 69.1 mm (2.7 in) |
| 2001 | 51.3 mm (2.0 in) |
| 2002 | 98.8 mm (3.9 in) |
| 2003 | 72.4 mm (2.9 in) |
| 2004 | 86.1 mm (3.4 in) |
| 2011 | 74.9 mm (2.9 in) |
| 2012 | 69.2 mm (2.7 in) |
| 2013 | 73.6 mm (2.9 in) |
| 2014 | 83.4 mm (3.3 in) |
| 2015 | 87.4 mm (3.4 in) |
| 2016 | 88.6 mm (3.5 in) |
| 2017 | 160.5 mm (6.3 in) |
| 2018 | 73.9 mm (2.9 in) |
| 2019 | 61.7 mm (2.4 in) |
| 2020 | 63.0 mm (2.5 in) |
| 2021 | 84.7 mm (3.3 in) |
| 2022 | 82.3 mm (3.2 in) |
| 2023 | 98.5 mm (3.9 in) |
| 2024 | 72.3 mm (2.8 in) |
| 2025 | 122.5 mm (4.8 in) |
| 2026 | 126.5 mm (5.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1918 | 19 days |
| 1919 | 21 days |
| 1920 | 26 days |
| 1921 | 20 days |
| 1922 | 16 days |
| 1923 | 24 days |
| 1924 | 24 days |
| 1925 | 22 days |
| 1926 | 15 days |
| 1927 | 19 days |
| 1928 | 13 days |
| 1929 | 16 days |
| 1930 | 19 days |
| 1931 | 17 days |
| 1932 | 22 days |
| 1933 | 18 days |
| 1934 | 20 days |
| 1935 | 12 days |
| 1936 | 27 days |
| 1937 | 16 days |
| 1938 | 27 days |
| 1939 | 24 days |
| 1940 | 16 days |
| 1941 | 21 days |
| 1942 | 17 days |
| 1943 | 19 days |
| 1944 | 29 days |
| 1945 | 16 days |
| 1946 | 31 days |
| 1947 | 18 days |
| 1948 | 19 days |
| 1949 | 13 days |
| 1950 | 16 days |
| 1951 | 17 days |
| 1952 | 23 days |
| 1953 | 25 days |
| 1954 | 14 days |
| 1955 | 18 days |
| 1956 | 15 days |
| 1957 | 23 days |
| 1958 | 23 days |
| 1959 | 13 days |
| 1960 | 11 days |
| 1961 | 13 days |
| 1962 | 17 days |
| 1963 | 44 days |
| 1964 | 19 days |
| 1965 | 18 days |
| 1966 | 17 days |
| 1967 | 25 days |
| 1968 | 20 days |
| 1969 | 14 days |
| 1970 | 15 days |
| 1971 | 13 days |
| 1972 | 15 days |
| 1973 | 17 days |
| 1974 | 14 days |
| 1975 | 15 days |
| 1976 | 25 days |
| 1977 | 15 days |
| 1978 | 17 days |
| 1979 | 18 days |
| 1980 | 22 days |
| 1981 | 17 days |
| 1982 | 17 days |
| 1983 | 22 days |
| 1984 | 17 days |
| 1985 | 22 days |
| 1986 | 16 days |
| 1987 | 29 days |
| 1988 | 20 days |
| 1989 | 15 days |
| 1990 | 13 days |
| 1991 | 13 days |
| 1992 | 19 days |
| 1993 | 21 days |
| 1994 | 21 days |
| 1995 | 28 days |
| 1996 | 14 days |
| 1997 | 17 days |
| 1998 | 14 days |
| 1999 | 33 days |
| 2000 | 27 days |
| 2001 | 31 days |
| 2002 | 12 days |
| 2003 | 11 days |
| 2004 | 12 days |
| 2011 | 13 days |
| 2012 | 17 days |
| 2013 | 11 days |
| 2014 | 16 days |
| 2015 | 12 days |
| 2016 | 15 days |
| 2017 | 17 days |
| 2018 | 18 days |
| 2019 | 23 days |
| 2020 | 14 days |
| 2021 | 11 days |
| 2022 | 21 days |
| 2023 | 21 days |
| 2024 | 17 days |
| 2025 | 16 days |
| 2026 | 14 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
87 years with a frostAcross 87 years with a frost, the median last spring frost at London State Fish Hatchery falls on 28 April and the median first autumn frost on 13 October, which leaves a median of 167 days between them.
In 1981 to 2025 the median growing season was 175 days. That is 5 days more than in 1919 to 1952.
Fitted over all years, the growing season changes by +1.4 days per decade at this station.
| Measure | Median, all years | Earliest period (1919 to 1952) | Recent period (1981 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 28 April | 28 April | 25 April | 3 days earlier | -1.1 days per decade |
| First autumn frost | 13 October | 14 October | 17 October | 3 days later | +0.3 days per decade |
| Growing days | 167 days | 170 days | 175 days | 5 days more | +1.4 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
90 years, 1919 to 2025A day with at least 57.5 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 118.9 mm (4.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 57.5 mm (2.3 in) | |
| 5 years | 75.3 mm (3.0 in) | |
| 10 years | 86.5 mm (3.4 in) | |
| 25 years | 100.0 mm (3.9 in) | |
| 50 years | 109.7 mm (4.3 in) | |
| 100 years | 118.9 mm (4.7 in) | Longer than the 90 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, 90 years of values from 1919 to 2025.
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: 120.9 mm (4.8 in) in 1979; 108.0 mm (4.3 in) in 1995; 108.0 mm (4.3 in) in 2025.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of London State Fish Hatchery, at 1926. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1926 ran 0.3 C (0.6 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1926 | -0.3 | -0.6 | 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.
Climate Twins
1999 to 2025 against 1961 to 1990Over 1999 to 2025, London State Fish Hatchery had a mean temperature of 10.7 C (51.3 F) and 1,072.9 mm (42.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Mc Connellsville Lk 7 (United States, 144 km away), Landisville 2 NW (United States, 604 km away) and Milford (United States, 104 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Mc Connellsville Lk 7 | United States | 144 km (89 mi) | 10.9 C (51.5 F) | 1,070.1 mm (42.1 in) | 0.61 |
| Landisville 2 NW | United States | 604 km (375 mi) | 10.9 C (51.6 F) | 1,034.5 mm (40.7 in) | 0.65 |
| Milford | United States | 104 km (65 mi) | 10.9 C (51.6 F) | 1,158.2 mm (45.6 in) | 0.68 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).