Dayton 1 WSW Weather Records (USC00452030)
Record envelope, standing records and threshold days for Dayton 1 WSW (USC00452030), Washington, United States, with 134 years of record.
Key Facts for Dayton 1 WSW
- Dayton 1 WSW (USC00452030) is a weather station in Washington, United States at 46.32 latitude and -118.00 longitude, 475 m (1,557 ft) above sea level.
- The station reports from 1893 to 2026, 134 years of record.
- 1,464 records set at Dayton 1 WSW still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Dayton 1 WSW set a daily record high maximum temperature of 40.0 C (104.0 F) on 22 August 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Washington, United States, 46.32 latitude, -118.00 longitude.
- Elevation: 475 m (1,557 ft).
- Period of record: 1893 to 2026, 134 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
1 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 21.1 C (70.0 F) | -30.0 C (-22.0 F) | 15.6 C (60.1 F) | -8.9 C (16.0 F) |
| Feb | 23.3 C (73.9 F) | -30.0 C (-22.0 F) | 16.7 C (62.1 F) | -3.9 C (25.0 F) |
| Mar | 28.9 C (84.0 F) | -16.7 C (1.9 F) | 16.1 C (61.0 F) | -2.2 C (28.0 F) |
| Apr | 33.9 C (93.0 F) | -11.1 C (12.0 F) | 21.7 C (71.1 F) | -0.6 C (30.9 F) |
| May | 38.3 C (100.9 F) | -7.8 C (18.0 F) | 28.3 C (82.9 F) | 3.3 C (37.9 F) |
| Jun | 43.9 C (111.0 F) | -5.6 C (21.9 F) | 32.8 C (91.0 F) | 5.6 C (42.1 F) |
| Jul | 42.8 C (109.0 F) | -1.1 C (30.0 F) | 36.7 C (98.1 F) | 8.9 C (48.0 F) |
| Aug | 45.6 C (114.1 F) | -2.2 C (28.0 F) | 40.0 C (104.0 F) | 7.8 C (46.0 F) |
| Sep | 40.6 C (105.1 F) | -7.8 C (18.0 F) | 29.4 C (84.9 F) | 2.2 C (36.0 F) |
| Oct | 33.3 C (91.9 F) | -13.9 C (7.0 F) | 27.2 C (81.0 F) | 6.1 C (43.0 F) |
| Nov | 26.7 C (80.1 F) | -23.3 C (-9.9 F) | n/a | n/a |
| Dec | 20.6 C (69.1 F) | -31.7 C (-25.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1893 | 4 |
| 1894 | 7 |
| 1895 | 3 |
| 1896 | 9 |
| 1897 | 6 |
| 1898 | 16 |
| 1899 | 13 |
| 1900 | 26 |
| 1901 | 10 |
| 1902 | 10 |
| 1903 | 6 |
| 1904 | 10 |
| 1905 | 14 |
| 1906 | 19 |
| 1907 | 3 |
| 1908 | 5 |
| 1909 | 14 |
| 1910 | 20 |
| 1911 | 11 |
| 1912 | 11 |
| 1913 | 12 |
| 1914 | 4 |
| 1915 | 9 |
| 1916 | 13 |
| 1917 | 19 |
| 1918 | 19 |
| 1919 | 27 |
| 1920 | 2 |
| 1921 | 8 |
| 1922 | 17 |
| 1923 | 5 |
| 1924 | 21 |
| 1925 | 5 |
| 1926 | 10 |
| 1927 | 7 |
| 1928 | 9 |
| 1929 | 10 |
| 1930 | 17 |
| 1931 | 7 |
| 1932 | 9 |
| 1933 | 12 |
| 1934 | 14 |
| 1935 | 17 |
| 1936 | 26 |
| 1937 | 9 |
| 1938 | 5 |
| 1939 | 11 |
| 1940 | 9 |
| 1941 | 8 |
| 1942 | 5 |
| 1943 | 5 |
| 1944 | 9 |
| 1945 | 5 |
| 1946 | 7 |
| 1947 | 5 |
| 1948 | 3 |
| 1949 | 7 |
| 1950 | 16 |
| 1951 | 9 |
| 1952 | 12 |
| 1953 | 15 |
| 1954 | 9 |
| 1955 | 14 |
| 1956 | 4 |
| 1957 | 9 |
| 1958 | 14 |
| 1959 | 12 |
| 1960 | 12 |
| 1961 | 15 |
| 1962 | 9 |
| 1963 | 10 |
| 1964 | 7 |
| 1965 | 14 |
| 1966 | 7 |
| 1967 | 10 |
| 1968 | 15 |
| 1969 | 4 |
| 1970 | 8 |
| 1971 | 12 |
| 1972 | 16 |
| 1973 | 4 |
| 1974 | 5 |
| 1975 | 12 |
| 1976 | 4 |
| 1977 | 11 |
| 1978 | 3 |
| 1979 | 11 |
| 1980 | 5 |
| 1981 | 9 |
| 1982 | 7 |
| 1983 | 12 |
| 1984 | 2 |
| 1985 | 20 |
| 1986 | 11 |
| 1987 | 11 |
| 1988 | 3 |
| 1989 | 12 |
| 1990 | 15 |
| 1991 | 6 |
| 1992 | 7 |
| 1993 | 8 |
| 1994 | 7 |
| 1995 | 7 |
| 1996 | 4 |
| 1997 | 5 |
| 1998 | 10 |
| 1999 | 12 |
| 2000 | 2 |
| 2001 | 8 |
| 2002 | 7 |
| 2003 | 9 |
| 2004 | 8 |
| 2005 | 4 |
| 2007 | 120 |
| 2008 | 105 |
| 2009 | 9 |
| 2010 | 5 |
| 2011 | 4 |
| 2012 | 5 |
| 2013 | 4 |
| 2014 | 8 |
| 2015 | 14 |
| 2016 | 3 |
| 2018 | 7 |
| 2019 | 17 |
| 2020 | 8 |
| 2021 | 9 |
| 2022 | 6 |
| 2023 | 7 |
| 2024 | 7 |
| 2025 | 7 |
| 2026 | 1 |
All-Time Record Progression
9 new records| Date | Kind | Detail |
|---|---|---|
| 1930-01-18 | Record low minimum temperature | Record low minimum temperature -30.0 C (-22.0 F) |
| 1941-07-17 | Record high maximum temperature | Record high maximum temperature 42.2 C (108.0 F) |
| 1960-07-19 | Record high maximum temperature | Record high maximum temperature 42.8 C (109.0 F) |
| 1961-08-05 | Record high maximum temperature | Record high maximum temperature 45.6 C (114.1 F) |
| 1964-12-17 | Record low maximum temperature | Record low maximum temperature -18.9 C (-2.0 F) |
| 1968-12-30 | Record low maximum temperature | Record low maximum temperature -19.4 C (-2.9 F) |
| 1968-12-30 | Record low minimum temperature | Record low minimum temperature -31.7 C (-25.1 F) |
| 1994-11-01 | Record daily precipitation | Record daily precipitation 55.4 mm (2.2 in) |
| 1996-12-25 | Record daily snowfall | Record daily snowfall 44.5 cm (17.5 in) |
Wettest Day of Each Month
Nov: 55.4 mm (2.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 37.1 mm (1.5 in) | 10 January 1989 |
| Feb | 43.2 mm (1.7 in) | 8 February 1899 |
| Mar | 52.8 mm (2.1 in) | 31 March 1931 |
| Apr | 33.0 mm (1.3 in) | 28 April 1990 |
| May | 53.8 mm (2.1 in) | 29 May 1906 |
| Jun | 41.1 mm (1.6 in) | 26 June 1916 |
| Jul | 36.1 mm (1.4 in) | 27 July 1941 |
| Aug | 46.2 mm (1.8 in) | 12 August 1922 |
| Sep | 35.6 mm (1.4 in) | 16 September 1893 |
| Oct | 37.6 mm (1.5 in) | 9 October 1955 |
| Nov | 55.4 mm (2.2 in) | 1 November 1994 |
| Dec | 52.3 mm (2.1 in) | 19 December 1917 |
Period of Record Coverage
1893 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1893 | 238 | 65% | No |
| 1894 | 212 | 58% | No |
| 1895 | 152 | 42% | No |
| 1896 | 61 | 17% | No |
| 1897 | 328 | 90% | No |
| 1898 | 303 | 83% | No |
| 1899 | 347 | 95% | Yes |
| 1900 | 363 | 99% | Yes |
| 1901 | 236 | 65% | No |
| 1902 | 150 | 41% | No |
| 1903 | 306 | 84% | No |
| 1904 | 332 | 91% | Yes |
| 1905 | 361 | 99% | Yes |
| 1906 | 243 | 67% | No |
| 1907 | 240 | 66% | No |
| 1908 | 336 | 92% | Yes |
| 1909 | 365 | 100% | Yes |
| 1910 | 332 | 91% | Yes |
| 1911 | 364 | 100% | Yes |
| 1912 | 366 | 100% | Yes |
| 1913 | 365 | 100% | Yes |
| 1914 | 365 | 100% | Yes |
| 1915 | 364 | 100% | Yes |
| 1916 | 365 | 100% | Yes |
| 1917 | 359 | 98% | Yes |
| 1918 | 363 | 99% | Yes |
| 1919 | 364 | 100% | Yes |
| 1920 | 365 | 100% | Yes |
| 1921 | 363 | 99% | Yes |
| 1922 | 362 | 99% | Yes |
| 1923 | 354 | 97% | Yes |
| 1924 | 354 | 97% | Yes |
| 1925 | 360 | 99% | Yes |
| 1926 | 360 | 99% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 363 | 99% | Yes |
| 1929 | 360 | 99% | Yes |
| 1930 | 362 | 99% | Yes |
| 1931 | 363 | 99% | Yes |
| 1932 | 364 | 99% | Yes |
| 1933 | 364 | 100% | Yes |
| 1934 | 363 | 99% | Yes |
| 1935 | 359 | 98% | Yes |
| 1936 | 364 | 99% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 363 | 99% | Yes |
| 1939 | 361 | 99% | Yes |
| 1940 | 363 | 99% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 358 | 98% | Yes |
| 1943 | 363 | 99% | Yes |
| 1944 | 362 | 99% | Yes |
| 1945 | 362 | 99% | Yes |
| 1946 | 363 | 99% | Yes |
| 1947 | 361 | 99% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 364 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 362 | 99% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 363 | 99% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 363 | 99% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 363 | 99% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 363 | 99% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 355 | 97% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 335 | 92% | Yes |
| 1973 | 331 | 91% | Yes |
| 1974 | 334 | 92% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 360 | 99% | Yes |
| 1980 | 364 | 99% | Yes |
| 1981 | 362 | 99% | Yes |
| 1982 | 363 | 99% | Yes |
| 1983 | 364 | 100% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 363 | 99% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 364 | 100% | Yes |
| 1996 | 362 | 99% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 363 | 99% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 362 | 99% | Yes |
| 2001 | 364 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 364 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 181 | 50% | No |
| 2007 | 273 | 75% | No |
| 2008 | 217 | 59% | No |
| 2009 | 361 | 99% | Yes |
| 2010 | 358 | 98% | Yes |
| 2011 | 351 | 96% | Yes |
| 2012 | 361 | 99% | Yes |
| 2013 | 363 | 99% | Yes |
| 2014 | 331 | 91% | Yes |
| 2015 | 274 | 75% | No |
| 2016 | 366 | 100% | Yes |
| 2017 | 361 | 99% | Yes |
| 2018 | 349 | 96% | 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 | 341 | 93% | Yes |
| 2026 | 217 | 59% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 22 August 2026 | Dayton 1 WSW, US | daily high max (Provisional) | 40.0 C (104.0 F) | 1.1 C (2.0 F) | 64 years | 31 of 100 (Routine) |
| 3 May 2026 | Dayton 1 WSW, US | monthly high min | 19.4 C (66.9 F) | 1.1 C (2.0 F) | 97 years | 52 of 100 (Notable) |
| 16 April 2026 | Dayton 1 WSW, US | daily snowfall | 1.3 cm (0.5 in) | 1.3 cm (0.5 in) | 132 years | 20 of 100 (Routine) |
| 24 February 2026 | Dayton 1 WSW, US | daily rain | 22.9 mm (0.9 in) | 2.6 mm (0.10 in) | 0 years | 15 of 100 (Routine) |
| 25 December 2025 | Dayton 1 WSW, US | daily high max (Tie) | 16.7 C (62.1 F) | tie | 54 years | 6 of 100 (Routine) |
| 17 December 2025 | Dayton 1 WSW, US | daily high max | 16.1 C (61.0 F) | 1.7 C (3.1 F) | 108 years | 42 of 100 (Notable) |
| 16 December 2025 | Dayton 1 WSW, US | daily high min | 9.4 C (48.9 F) | 1.6 C (2.9 F) | 108 years | 42 of 100 (Notable) |
| 14 December 2025 | Dayton 1 WSW, US | daily high max | 17.8 C (64.0 F) | 0.6 C (1.1 F) | 56 years | 26 of 100 (Routine) |
| 26 August 2025 | Dayton 1 WSW, US | daily high min (Tie) | 20.0 C (68.0 F) | tie | 14 years | 3 of 100 (Routine) |
| 25 August 2025 | Dayton 1 WSW, US | daily high min | 19.4 C (66.9 F) | 1.1 C (2.0 F) | 59 years | 30 of 100 (Routine) |
| 13 August 2025 | Dayton 1 WSW, US | daily high min (Tie) | 19.4 C (66.9 F) | tie | 24 years | 4 of 100 (Routine) |
| 27 March 2025 | Dayton 1 WSW, US | daily high max | 26.7 C (80.1 F) | 3.9 C (7.0 F) | 72 years | 39 of 100 (Notable) |
| 27 March 2025 | Dayton 1 WSW, US | daily high min | 10.6 C (51.1 F) | 1.7 C (3.1 F) | 51 years | 29 of 100 (Routine) |
| 26 March 2025 | Dayton 1 WSW, US | daily high max | 26.1 C (79.0 F) | 2.2 C (4.0 F) | 64 years | 33 of 100 (Routine) |
| 22 March 2025 | Dayton 1 WSW, US | daily rain | 24.4 mm (1.0 in) | 2.6 mm (0.10 in) | 8 years | 17 of 100 (Routine) |
| 24 February 2025 | Dayton 1 WSW, US | daily rain | 20.3 mm (0.8 in) | 2.5 mm (0.10 in) | 31 years | 20 of 100 (Routine) |
| 12 February 2025 | Dayton 1 WSW, US | daily low max (Tie) | -7.2 C (19.0 F) | tie | 120 years | 10 of 100 (Routine) |
| 21 October 2024 | Dayton 1 WSW, US | daily high max | 26.7 C (80.1 F) | 0.6 C (1.1 F) | 120 years | 41 of 100 (Notable) |
| 6 May 2024 | Dayton 1 WSW, US | daily low max | 8.3 C (46.9 F) | 1.1 C (2.0 F) | 63 years | 30 of 100 (Routine) |
| 5 April 2024 | Dayton 1 WSW, US | daily low max (Tie) | 6.7 C (44.1 F) | tie | 95 years | 9 of 100 (Routine) |
Climate Trend
105 complete years, 1905 to 2024| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1905 | 10.3 C | -0.22 C |
| 1908 | 10.9 C | +0.32 C |
| 1909 | 9.8 C | -0.73 C |
| 1911 | 9.9 C | -0.67 C |
| 1912 | 10.1 C | -0.51 C |
| 1913 | 9.7 C | -0.84 C |
| 1914 | 10.7 C | +0.17 C |
| 1916 | 9.2 C | -1.38 C |
| 1917 | 11.4 C | +0.82 C |
| 1918 | 11.6 C | +1.06 C |
| 1919 | 10.3 C | -0.31 C |
| 1920 | 10.5 C | -0.07 C |
| 1921 | 11.0 C | +0.47 C |
| 1922 | 10.1 C | -0.46 C |
| 1923 | 10.1 C | -0.43 C |
| 1924 | 10.0 C | -0.57 C |
| 1925 | 11.7 C | +1.10 C |
| 1926 | 11.6 C | +1.01 C |
| 1927 | 9.9 C | -0.62 C |
| 1928 | 10.5 C | -0.06 C |
| 1930 | 9.6 C | -0.94 C |
| 1931 | 10.4 C | -0.19 C |
| 1932 | 10.1 C | -0.42 C |
| 1933 | 10.5 C | -0.08 C |
| 1934 | 12.5 C | +1.90 C |
| 1935 | 10.3 C | -0.22 C |
| 1936 | 10.6 C | +0.07 C |
| 1937 | 10.4 C | -0.15 C |
| 1938 | 11.1 C | +0.50 C |
| 1939 | 11.6 C | +1.06 C |
| 1940 | 11.5 C | +0.96 C |
| 1941 | 11.2 C | +0.63 C |
| 1942 | 10.4 C | -0.15 C |
| 1943 | 10.0 C | -0.57 C |
| 1944 | 10.7 C | +0.10 C |
| 1945 | 10.7 C | +0.14 C |
| 1946 | 10.7 C | +0.16 C |
| 1947 | 11.2 C | +0.63 C |
| 1948 | 9.5 C | -1.05 C |
| 1949 | 9.8 C | -0.80 C |
| 1950 | 9.6 C | -0.92 C |
| 1951 | 9.7 C | -0.91 C |
| 1952 | 10.4 C | -0.17 C |
| 1953 | 11.1 C | +0.56 C |
| 1954 | 9.7 C | -0.90 C |
| 1955 | 8.9 C | -1.67 C |
| 1956 | 9.9 C | -0.64 C |
| 1957 | 9.7 C | -0.85 C |
| 1958 | 12.3 C | +1.71 C |
| 1959 | 10.1 C | -0.49 C |
| 1960 | 10.0 C | -0.59 C |
| 1961 | 11.3 C | +0.70 C |
| 1962 | 10.2 C | -0.41 C |
| 1963 | 10.7 C | +0.14 C |
| 1964 | 9.9 C | -0.64 C |
| 1965 | 11.0 C | +0.40 C |
| 1966 | 11.3 C | +0.74 C |
| 1967 | 11.7 C | +1.12 C |
| 1968 | 10.9 C | +0.37 C |
| 1969 | 10.2 C | -0.32 C |
| 1970 | 10.7 C | +0.11 C |
| 1971 | 10.2 C | -0.33 C |
| 1975 | 10.2 C | -0.40 C |
| 1976 | 10.6 C | 0.00 C |
| 1977 | 10.4 C | -0.16 C |
| 1978 | 10.0 C | -0.55 C |
| 1979 | 10.5 C | -0.07 C |
| 1980 | 10.4 C | -0.20 C |
| 1981 | 11.0 C | +0.46 C |
| 1982 | 10.3 C | -0.27 C |
| 1983 | 10.8 C | +0.28 C |
| 1984 | 9.9 C | -0.67 C |
| 1985 | 8.4 C | -2.14 C |
| 1986 | 10.9 C | +0.34 C |
| 1987 | 11.4 C | +0.80 C |
| 1988 | 11.1 C | +0.50 C |
| 1989 | 10.4 C | -0.14 C |
| 1990 | 11.1 C | +0.56 C |
| 1991 | 10.7 C | +0.14 C |
| 1992 | 11.7 C | +1.14 C |
| 1993 | 9.5 C | -1.04 C |
| 1994 | 11.5 C | +0.96 C |
| 1995 | 10.9 C | +0.36 C |
| 1996 | 10.3 C | -0.23 C |
| 1997 | 11.1 C | +0.54 C |
| 1998 | 12.0 C | +1.48 C |
| 1999 | 11.5 C | +0.90 C |
| 2000 | 10.4 C | -0.12 C |
| 2001 | 11.1 C | +0.51 C |
| 2002 | 11.0 C | +0.40 C |
| 2003 | 11.8 C | +1.26 C |
| 2004 | 11.4 C | +0.86 C |
| 2009 | 9.8 C | -0.76 C |
| 2010 | 10.6 C | 0.00 C |
| 2011 | 9.6 C | -0.97 C |
| 2012 | 10.8 C | +0.23 C |
| 2013 | 10.2 C | -0.35 C |
| 2016 | 11.2 C | +0.67 C |
| 2017 | 10.1 C | -0.51 C |
| 2019 | 9.4 C | -1.20 C |
| 2020 | 10.9 C | +0.35 C |
| 2021 | 11.4 C | +0.84 C |
| 2022 | 9.9 C | -0.65 C |
| 2023 | 10.9 C | +0.32 C |
| 2024 | 10.9 C | +0.36 C |
The fitted trend in annual mean temperature here over 1905 to 2024 is 0.02 C (-0.02 to 0.07) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.04 F (-0.03 to 0.12) per decade. The slope is a straight line fitted to 105 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.02 C (-0.02 to 0.07) per decade | 0.04 F (-0.03 to 0.12) per decade | 1905 to 2024 | 105 | Not clearly different from zero |
| Mean daily maximum | 0.02 C (-0.03 to 0.07) per decade | 0.04 F (-0.05 to 0.12) per decade | 1905 to 2024 | 105 | Not clearly different from zero |
| Mean daily minimum | 0.03 C (-0.02 to 0.07) per decade | 0.05 F (-0.03 to 0.13) per decade | 1905 to 2024 | 105 | 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
1893 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 45.6 C (114.1 F) | 1961 | 39.4 C (102.9 F) | 133 |
| Coldest night (TNn) | -31.7 C (-25.1 F) | 1968 | -18.3 C (-0.9 F) | 133 |
| Wettest day (Rx1day) | 55.4 mm (2.2 in) | 1994 | 26.7 mm (1.1 in) | 133 |
| Wettest five days (Rx5day) | 96.8 mm (3.8 in) | 1906 | 47.1 mm (1.9 in) | 133 |
| Longest dry spell (CDD) | 87 days | 2012 | 38 days | 133 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1893 | 36.1 C (97.0 F) |
| 1894 | 38.3 C (100.9 F) |
| 1895 | 37.2 C (99.0 F) |
| 1896 | 18.3 C (64.9 F) |
| 1897 | 38.3 C (100.9 F) |
| 1898 | 33.9 C (93.0 F) |
| 1899 | 36.1 C (97.0 F) |
| 1900 | 39.4 C (102.9 F) |
| 1901 | 40.6 C (105.1 F) |
| 1902 | 32.2 C (90.0 F) |
| 1903 | 36.1 C (97.0 F) |
| 1904 | 38.9 C (102.0 F) |
| 1905 | 39.4 C (102.9 F) |
| 1906 | 37.2 C (99.0 F) |
| 1907 | 33.9 C (93.0 F) |
| 1908 | 37.2 C (99.0 F) |
| 1909 | 35.6 C (96.1 F) |
| 1910 | 35.6 C (96.1 F) |
| 1911 | 37.8 C (100.0 F) |
| 1912 | 35.0 C (95.0 F) |
| 1913 | 36.1 C (97.0 F) |
| 1914 | 36.7 C (98.1 F) |
| 1915 | 41.7 C (107.1 F) |
| 1916 | 38.9 C (102.0 F) |
| 1917 | 40.6 C (105.1 F) |
| 1918 | 40.6 C (105.1 F) |
| 1919 | 40.6 C (105.1 F) |
| 1920 | 40.6 C (105.1 F) |
| 1921 | 37.8 C (100.0 F) |
| 1922 | 41.7 C (107.1 F) |
| 1923 | 38.3 C (100.9 F) |
| 1924 | 38.3 C (100.9 F) |
| 1925 | 37.2 C (99.0 F) |
| 1926 | 40.0 C (104.0 F) |
| 1927 | 38.3 C (100.9 F) |
| 1928 | 41.7 C (107.1 F) |
| 1929 | 39.4 C (102.9 F) |
| 1930 | 39.4 C (102.9 F) |
| 1931 | 41.1 C (106.0 F) |
| 1932 | 37.8 C (100.0 F) |
| 1933 | 39.4 C (102.9 F) |
| 1934 | 40.0 C (104.0 F) |
| 1935 | 41.1 C (106.0 F) |
| 1936 | 39.4 C (102.9 F) |
| 1937 | 39.4 C (102.9 F) |
| 1938 | 38.9 C (102.0 F) |
| 1939 | 40.6 C (105.1 F) |
| 1940 | 41.1 C (106.0 F) |
| 1941 | 42.2 C (108.0 F) |
| 1942 | 39.4 C (102.9 F) |
| 1943 | 37.2 C (99.0 F) |
| 1944 | 38.3 C (100.9 F) |
| 1945 | 37.2 C (99.0 F) |
| 1946 | 39.4 C (102.9 F) |
| 1947 | 37.8 C (100.0 F) |
| 1948 | 37.2 C (99.0 F) |
| 1949 | 37.8 C (100.0 F) |
| 1950 | 37.8 C (100.0 F) |
| 1951 | 40.0 C (104.0 F) |
| 1952 | 40.0 C (104.0 F) |
| 1953 | 40.6 C (105.1 F) |
| 1954 | 37.8 C (100.0 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 37.8 C (100.0 F) |
| 1957 | 33.9 C (93.0 F) |
| 1958 | 41.1 C (106.0 F) |
| 1959 | 40.0 C (104.0 F) |
| 1960 | 42.8 C (109.0 F) |
| 1961 | 45.6 C (114.1 F) |
| 1962 | 39.4 C (102.9 F) |
| 1963 | 38.3 C (100.9 F) |
| 1964 | 39.4 C (102.9 F) |
| 1965 | 40.6 C (105.1 F) |
| 1966 | 36.7 C (98.1 F) |
| 1967 | 40.6 C (105.1 F) |
| 1968 | 41.7 C (107.1 F) |
| 1969 | 36.7 C (98.1 F) |
| 1970 | 41.1 C (106.0 F) |
| 1971 | 40.6 C (105.1 F) |
| 1972 | 41.1 C (106.0 F) |
| 1973 | 40.6 C (105.1 F) |
| 1974 | 39.4 C (102.9 F) |
| 1975 | 42.8 C (109.0 F) |
| 1976 | 38.3 C (100.9 F) |
| 1977 | 41.7 C (107.1 F) |
| 1978 | 40.0 C (104.0 F) |
| 1979 | 41.1 C (106.0 F) |
| 1980 | 39.4 C (102.9 F) |
| 1981 | 41.1 C (106.0 F) |
| 1982 | 40.6 C (105.1 F) |
| 1983 | 40.0 C (104.0 F) |
| 1984 | 42.2 C (108.0 F) |
| 1985 | 40.6 C (105.1 F) |
| 1986 | 40.0 C (104.0 F) |
| 1987 | 38.9 C (102.0 F) |
| 1988 | 40.0 C (104.0 F) |
| 1989 | 38.3 C (100.9 F) |
| 1990 | 42.2 C (108.0 F) |
| 1991 | 37.8 C (100.0 F) |
| 1992 | 40.6 C (105.1 F) |
| 1993 | 35.6 C (96.1 F) |
| 1994 | 41.1 C (106.0 F) |
| 1995 | 37.2 C (99.0 F) |
| 1996 | 40.6 C (105.1 F) |
| 1997 | 38.3 C (100.9 F) |
| 1998 | 43.3 C (109.9 F) |
| 1999 | 40.0 C (104.0 F) |
| 2000 | 38.3 C (100.9 F) |
| 2001 | 40.0 C (104.0 F) |
| 2002 | 41.7 C (107.1 F) |
| 2003 | 40.0 C (104.0 F) |
| 2004 | 40.0 C (104.0 F) |
| 2005 | 33.9 C (93.0 F) |
| 2007 | 40.6 C (105.1 F) |
| 2008 | 33.3 C (91.9 F) |
| 2009 | 40.0 C (104.0 F) |
| 2010 | 37.2 C (99.0 F) |
| 2011 | 37.2 C (99.0 F) |
| 2012 | 38.9 C (102.0 F) |
| 2013 | 39.4 C (102.9 F) |
| 2014 | 38.9 C (102.0 F) |
| 2015 | 42.8 C (109.0 F) |
| 2016 | 37.2 C (99.0 F) |
| 2017 | 37.8 C (100.0 F) |
| 2018 | 42.2 C (108.0 F) |
| 2019 | 37.2 C (99.0 F) |
| 2020 | 40.0 C (104.0 F) |
| 2021 | 43.9 C (111.0 F) |
| 2022 | 40.6 C (105.1 F) |
| 2023 | 38.3 C (100.9 F) |
| 2024 | 39.4 C (102.9 F) |
| 2025 | 37.8 C (100.0 F) |
| 2026 | 40.0 C (104.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1893 | -6.1 C (21.0 F) |
| 1894 | -16.7 C (1.9 F) |
| 1895 | -8.9 C (16.0 F) |
| 1896 | -22.8 C (-9.0 F) |
| 1897 | -17.2 C (1.0 F) |
| 1898 | -21.7 C (-7.1 F) |
| 1899 | -24.4 C (-11.9 F) |
| 1900 | -19.4 C (-2.9 F) |
| 1901 | -13.3 C (8.1 F) |
| 1902 | -21.1 C (-6.0 F) |
| 1903 | -7.2 C (19.0 F) |
| 1904 | -9.4 C (15.1 F) |
| 1905 | -24.4 C (-11.9 F) |
| 1906 | -16.7 C (1.9 F) |
| 1907 | -6.7 C (19.9 F) |
| 1908 | -15.6 C (3.9 F) |
| 1909 | -28.9 C (-20.0 F) |
| 1910 | -18.9 C (-2.0 F) |
| 1911 | -15.0 C (5.0 F) |
| 1912 | -20.0 C (-4.0 F) |
| 1913 | -18.9 C (-2.0 F) |
| 1914 | -16.1 C (3.0 F) |
| 1915 | -12.2 C (10.0 F) |
| 1916 | -25.0 C (-13.0 F) |
| 1917 | -15.0 C (5.0 F) |
| 1918 | -17.2 C (1.0 F) |
| 1919 | -28.3 C (-18.9 F) |
| 1920 | -16.1 C (3.0 F) |
| 1921 | -17.2 C (1.0 F) |
| 1922 | -26.7 C (-16.1 F) |
| 1923 | -19.4 C (-2.9 F) |
| 1924 | -25.6 C (-14.1 F) |
| 1925 | -10.6 C (12.9 F) |
| 1926 | -21.1 C (-6.0 F) |
| 1927 | -28.3 C (-18.9 F) |
| 1928 | -16.7 C (1.9 F) |
| 1929 | -26.7 C (-16.1 F) |
| 1930 | -30.0 C (-22.0 F) |
| 1931 | -16.1 C (3.0 F) |
| 1932 | -22.8 C (-9.0 F) |
| 1933 | -22.2 C (-8.0 F) |
| 1934 | -5.0 C (23.0 F) |
| 1935 | -26.1 C (-15.0 F) |
| 1936 | -25.6 C (-14.1 F) |
| 1937 | -26.7 C (-16.1 F) |
| 1938 | -15.0 C (5.0 F) |
| 1939 | -18.9 C (-2.0 F) |
| 1940 | -12.8 C (9.0 F) |
| 1941 | -17.8 C (0.0 F) |
| 1942 | -23.3 C (-9.9 F) |
| 1943 | -22.2 C (-8.0 F) |
| 1944 | -13.3 C (8.1 F) |
| 1945 | -17.2 C (1.0 F) |
| 1946 | -13.9 C (7.0 F) |
| 1947 | -18.9 C (-2.0 F) |
| 1948 | -17.8 C (0.0 F) |
| 1949 | -23.3 C (-9.9 F) |
| 1950 | -30.0 C (-22.0 F) |
| 1951 | -21.1 C (-6.0 F) |
| 1952 | -20.6 C (-5.1 F) |
| 1953 | -7.2 C (19.0 F) |
| 1954 | -25.6 C (-14.1 F) |
| 1955 | -23.3 C (-9.9 F) |
| 1956 | -24.4 C (-11.9 F) |
| 1957 | -29.4 C (-20.9 F) |
| 1958 | -10.6 C (12.9 F) |
| 1959 | -18.9 C (-2.0 F) |
| 1960 | -21.1 C (-6.0 F) |
| 1961 | -21.7 C (-7.1 F) |
| 1962 | -17.8 C (0.0 F) |
| 1963 | -21.1 C (-6.0 F) |
| 1964 | -23.9 C (-11.0 F) |
| 1965 | -11.1 C (12.0 F) |
| 1966 | -8.9 C (16.0 F) |
| 1967 | -14.4 C (6.1 F) |
| 1968 | -31.7 C (-25.1 F) |
| 1969 | -22.8 C (-9.0 F) |
| 1970 | -13.3 C (8.1 F) |
| 1971 | -12.2 C (10.0 F) |
| 1972 | -23.9 C (-11.0 F) |
| 1973 | -21.7 C (-7.1 F) |
| 1974 | -26.7 C (-16.1 F) |
| 1975 | -12.2 C (10.0 F) |
| 1976 | -12.2 C (10.0 F) |
| 1977 | -18.9 C (-2.0 F) |
| 1978 | -26.1 C (-15.0 F) |
| 1979 | -25.6 C (-14.1 F) |
| 1980 | -18.3 C (-0.9 F) |
| 1981 | -10.0 C (14.0 F) |
| 1982 | -19.4 C (-2.9 F) |
| 1983 | -27.2 C (-17.0 F) |
| 1984 | -20.0 C (-4.0 F) |
| 1985 | -23.3 C (-9.9 F) |
| 1986 | -9.4 C (15.1 F) |
| 1987 | -17.2 C (1.0 F) |
| 1988 | -12.2 C (10.0 F) |
| 1989 | -26.1 C (-15.0 F) |
| 1990 | -29.4 C (-20.9 F) |
| 1991 | -10.0 C (14.0 F) |
| 1992 | -11.1 C (12.0 F) |
| 1993 | -21.1 C (-6.0 F) |
| 1994 | -15.6 C (3.9 F) |
| 1995 | -16.1 C (3.0 F) |
| 1996 | -27.2 C (-17.0 F) |
| 1997 | -12.8 C (9.0 F) |
| 1998 | -17.2 C (1.0 F) |
| 1999 | -7.8 C (18.0 F) |
| 2000 | -10.0 C (14.0 F) |
| 2001 | -7.2 C (19.0 F) |
| 2002 | -11.1 C (12.0 F) |
| 2003 | -13.9 C (7.0 F) |
| 2004 | -24.4 C (-11.9 F) |
| 2005 | -11.1 C (12.0 F) |
| 2007 | -13.9 C (7.0 F) |
| 2008 | -21.7 C (-7.1 F) |
| 2009 | -17.8 C (0.0 F) |
| 2010 | -22.2 C (-8.0 F) |
| 2011 | -16.7 C (1.9 F) |
| 2012 | -9.4 C (15.1 F) |
| 2013 | -19.4 C (-2.9 F) |
| 2014 | -18.9 C (-2.0 F) |
| 2015 | -12.2 C (10.0 F) |
| 2016 | -20.0 C (-4.0 F) |
| 2017 | -21.1 C (-6.0 F) |
| 2018 | -10.6 C (12.9 F) |
| 2019 | -15.6 C (3.9 F) |
| 2020 | -10.6 C (12.9 F) |
| 2021 | -15.6 C (3.9 F) |
| 2022 | -21.7 C (-7.1 F) |
| 2023 | -12.2 C (10.0 F) |
| 2024 | -24.4 C (-11.9 F) |
| 2025 | -17.8 C (0.0 F) |
| 2026 | -8.9 C (16.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1893 | 50.5 mm (2.0 in) |
| 1894 | 48.3 mm (1.9 in) |
| 1895 | 29.0 mm (1.1 in) |
| 1896 | 20.8 mm (0.8 in) |
| 1897 | 21.6 mm (0.9 in) |
| 1898 | 23.1 mm (0.9 in) |
| 1899 | 43.2 mm (1.7 in) |
| 1900 | 21.3 mm (0.8 in) |
| 1901 | 38.1 mm (1.5 in) |
| 1902 | 18.0 mm (0.7 in) |
| 1903 | 38.4 mm (1.5 in) |
| 1904 | 34.8 mm (1.4 in) |
| 1905 | 26.7 mm (1.1 in) |
| 1906 | 53.8 mm (2.1 in) |
| 1907 | 18.5 mm (0.7 in) |
| 1908 | 25.4 mm (1.0 in) |
| 1909 | 31.0 mm (1.2 in) |
| 1910 | 28.2 mm (1.1 in) |
| 1911 | 19.6 mm (0.8 in) |
| 1912 | 39.1 mm (1.5 in) |
| 1913 | 25.9 mm (1.0 in) |
| 1914 | 17.5 mm (0.7 in) |
| 1915 | 31.2 mm (1.2 in) |
| 1916 | 41.1 mm (1.6 in) |
| 1917 | 52.3 mm (2.1 in) |
| 1918 | 16.8 mm (0.7 in) |
| 1919 | 32.8 mm (1.3 in) |
| 1920 | 30.5 mm (1.2 in) |
| 1921 | 31.8 mm (1.3 in) |
| 1922 | 46.2 mm (1.8 in) |
| 1923 | 28.4 mm (1.1 in) |
| 1924 | 16.0 mm (0.6 in) |
| 1925 | 29.5 mm (1.2 in) |
| 1926 | 24.6 mm (1.0 in) |
| 1927 | 23.9 mm (0.9 in) |
| 1928 | 29.2 mm (1.1 in) |
| 1929 | 18.3 mm (0.7 in) |
| 1930 | 21.1 mm (0.8 in) |
| 1931 | 52.8 mm (2.1 in) |
| 1932 | 36.6 mm (1.4 in) |
| 1933 | 34.5 mm (1.4 in) |
| 1934 | 17.5 mm (0.7 in) |
| 1935 | 29.0 mm (1.1 in) |
| 1936 | 22.1 mm (0.9 in) |
| 1937 | 23.1 mm (0.9 in) |
| 1938 | 27.7 mm (1.1 in) |
| 1939 | 19.8 mm (0.8 in) |
| 1940 | 22.6 mm (0.9 in) |
| 1941 | 36.1 mm (1.4 in) |
| 1942 | 38.4 mm (1.5 in) |
| 1943 | 20.8 mm (0.8 in) |
| 1944 | 16.5 mm (0.6 in) |
| 1945 | 24.4 mm (1.0 in) |
| 1946 | 28.4 mm (1.1 in) |
| 1947 | 22.4 mm (0.9 in) |
| 1948 | 33.8 mm (1.3 in) |
| 1949 | 15.2 mm (0.6 in) |
| 1950 | 29.0 mm (1.1 in) |
| 1951 | 37.8 mm (1.5 in) |
| 1952 | 25.7 mm (1.0 in) |
| 1953 | 24.9 mm (1.0 in) |
| 1954 | 21.6 mm (0.9 in) |
| 1955 | 37.6 mm (1.5 in) |
| 1956 | 30.0 mm (1.2 in) |
| 1957 | 19.6 mm (0.8 in) |
| 1958 | 38.1 mm (1.5 in) |
| 1959 | 25.4 mm (1.0 in) |
| 1960 | 23.4 mm (0.9 in) |
| 1961 | 35.8 mm (1.4 in) |
| 1962 | 25.7 mm (1.0 in) |
| 1963 | 17.8 mm (0.7 in) |
| 1964 | 29.2 mm (1.1 in) |
| 1965 | 32.8 mm (1.3 in) |
| 1966 | 19.1 mm (0.8 in) |
| 1967 | 19.6 mm (0.8 in) |
| 1968 | 29.0 mm (1.1 in) |
| 1969 | 29.5 mm (1.2 in) |
| 1970 | 23.6 mm (0.9 in) |
| 1971 | 35.1 mm (1.4 in) |
| 1972 | 21.6 mm (0.9 in) |
| 1973 | 29.7 mm (1.2 in) |
| 1974 | 18.5 mm (0.7 in) |
| 1975 | 24.4 mm (1.0 in) |
| 1976 | 24.4 mm (1.0 in) |
| 1977 | 31.0 mm (1.2 in) |
| 1978 | 34.0 mm (1.3 in) |
| 1979 | 26.9 mm (1.1 in) |
| 1980 | 29.7 mm (1.2 in) |
| 1981 | 31.8 mm (1.3 in) |
| 1982 | 27.4 mm (1.1 in) |
| 1983 | 19.8 mm (0.8 in) |
| 1984 | 26.7 mm (1.1 in) |
| 1985 | 27.7 mm (1.1 in) |
| 1986 | 20.8 mm (0.8 in) |
| 1987 | 19.6 mm (0.8 in) |
| 1988 | 21.6 mm (0.9 in) |
| 1989 | 37.1 mm (1.5 in) |
| 1990 | 33.0 mm (1.3 in) |
| 1991 | 43.4 mm (1.7 in) |
| 1992 | 27.9 mm (1.1 in) |
| 1993 | 27.9 mm (1.1 in) |
| 1994 | 55.4 mm (2.2 in) |
| 1995 | 22.6 mm (0.9 in) |
| 1996 | 35.1 mm (1.4 in) |
| 1997 | 24.4 mm (1.0 in) |
| 1998 | 15.0 mm (0.6 in) |
| 1999 | 15.7 mm (0.6 in) |
| 2000 | 48.8 mm (1.9 in) |
| 2001 | 19.6 mm (0.8 in) |
| 2002 | 20.8 mm (0.8 in) |
| 2003 | 33.8 mm (1.3 in) |
| 2004 | 26.4 mm (1.0 in) |
| 2005 | 27.2 mm (1.1 in) |
| 2007 | 30.5 mm (1.2 in) |
| 2008 | 18.5 mm (0.7 in) |
| 2009 | 49.5 mm (1.9 in) |
| 2010 | 25.4 mm (1.0 in) |
| 2011 | 23.1 mm (0.9 in) |
| 2012 | 24.1 mm (0.9 in) |
| 2013 | 18.8 mm (0.7 in) |
| 2014 | 29.0 mm (1.1 in) |
| 2015 | 40.6 mm (1.6 in) |
| 2016 | 21.8 mm (0.9 in) |
| 2017 | 31.0 mm (1.2 in) |
| 2018 | 21.3 mm (0.8 in) |
| 2019 | 20.3 mm (0.8 in) |
| 2020 | 35.6 mm (1.4 in) |
| 2021 | 18.3 mm (0.7 in) |
| 2022 | 31.0 mm (1.2 in) |
| 2023 | 22.9 mm (0.9 in) |
| 2024 | 20.3 mm (0.8 in) |
| 2025 | 24.4 mm (1.0 in) |
| 2026 | 22.9 mm (0.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1893 | 77.0 mm (3.0 in) |
| 1894 | 63.1 mm (2.5 in) |
| 1895 | 29.0 mm (1.1 in) |
| 1896 | 48.5 mm (1.9 in) |
| 1897 | 35.0 mm (1.4 in) |
| 1898 | 48.3 mm (1.9 in) |
| 1899 | 73.7 mm (2.9 in) |
| 1900 | 39.6 mm (1.6 in) |
| 1901 | 45.0 mm (1.8 in) |
| 1902 | 40.3 mm (1.6 in) |
| 1903 | 35.6 mm (1.4 in) |
| 1904 | 50.8 mm (2.0 in) |
| 1905 | 60.4 mm (2.4 in) |
| 1906 | 96.8 mm (3.8 in) |
| 1907 | 42.2 mm (1.7 in) |
| 1908 | 54.9 mm (2.2 in) |
| 1909 | 43.7 mm (1.7 in) |
| 1910 | 56.9 mm (2.2 in) |
| 1911 | 37.8 mm (1.5 in) |
| 1912 | 47.0 mm (1.9 in) |
| 1913 | 54.7 mm (2.2 in) |
| 1914 | 48.1 mm (1.9 in) |
| 1915 | 49.4 mm (1.9 in) |
| 1916 | 61.1 mm (2.4 in) |
| 1917 | 82.6 mm (3.3 in) |
| 1918 | 36.7 mm (1.4 in) |
| 1919 | 57.3 mm (2.3 in) |
| 1920 | 55.9 mm (2.2 in) |
| 1921 | 69.4 mm (2.7 in) |
| 1922 | 62.2 mm (2.4 in) |
| 1923 | 37.1 mm (1.5 in) |
| 1924 | 38.9 mm (1.5 in) |
| 1925 | 40.9 mm (1.6 in) |
| 1926 | 46.3 mm (1.8 in) |
| 1927 | 55.0 mm (2.2 in) |
| 1928 | 54.9 mm (2.2 in) |
| 1929 | 76.4 mm (3.0 in) |
| 1930 | 39.8 mm (1.6 in) |
| 1931 | 94.6 mm (3.7 in) |
| 1932 | 63.7 mm (2.5 in) |
| 1933 | 58.1 mm (2.3 in) |
| 1934 | 41.7 mm (1.6 in) |
| 1935 | 33.1 mm (1.3 in) |
| 1936 | 47.8 mm (1.9 in) |
| 1937 | 45.5 mm (1.8 in) |
| 1938 | 43.9 mm (1.7 in) |
| 1939 | 43.2 mm (1.7 in) |
| 1940 | 48.8 mm (1.9 in) |
| 1941 | 64.5 mm (2.5 in) |
| 1942 | 68.8 mm (2.7 in) |
| 1943 | 45.4 mm (1.8 in) |
| 1944 | 27.0 mm (1.1 in) |
| 1945 | 36.6 mm (1.4 in) |
| 1946 | 42.4 mm (1.7 in) |
| 1947 | 63.3 mm (2.5 in) |
| 1948 | 65.3 mm (2.6 in) |
| 1949 | 37.0 mm (1.5 in) |
| 1950 | 75.4 mm (3.0 in) |
| 1951 | 72.4 mm (2.9 in) |
| 1952 | 32.8 mm (1.3 in) |
| 1953 | 53.9 mm (2.1 in) |
| 1954 | 41.0 mm (1.6 in) |
| 1955 | 69.9 mm (2.8 in) |
| 1956 | 47.0 mm (1.9 in) |
| 1957 | 41.4 mm (1.6 in) |
| 1958 | 68.6 mm (2.7 in) |
| 1959 | 39.3 mm (1.5 in) |
| 1960 | 37.5 mm (1.5 in) |
| 1961 | 53.0 mm (2.1 in) |
| 1962 | 64.2 mm (2.5 in) |
| 1963 | 45.7 mm (1.8 in) |
| 1964 | 75.7 mm (3.0 in) |
| 1965 | 34.9 mm (1.4 in) |
| 1966 | 48.8 mm (1.9 in) |
| 1967 | 40.9 mm (1.6 in) |
| 1968 | 42.5 mm (1.7 in) |
| 1969 | 57.0 mm (2.2 in) |
| 1970 | 57.4 mm (2.3 in) |
| 1971 | 53.7 mm (2.1 in) |
| 1972 | 46.3 mm (1.8 in) |
| 1973 | 43.7 mm (1.7 in) |
| 1974 | 28.9 mm (1.1 in) |
| 1975 | 50.8 mm (2.0 in) |
| 1976 | 38.7 mm (1.5 in) |
| 1977 | 54.3 mm (2.1 in) |
| 1978 | 48.3 mm (1.9 in) |
| 1979 | 47.5 mm (1.9 in) |
| 1980 | 65.4 mm (2.6 in) |
| 1981 | 42.5 mm (1.7 in) |
| 1982 | 45.5 mm (1.8 in) |
| 1983 | 42.2 mm (1.7 in) |
| 1984 | 50.0 mm (2.0 in) |
| 1985 | 44.8 mm (1.8 in) |
| 1986 | 43.0 mm (1.7 in) |
| 1987 | 26.7 mm (1.1 in) |
| 1988 | 41.9 mm (1.6 in) |
| 1989 | 61.5 mm (2.4 in) |
| 1990 | 58.5 mm (2.3 in) |
| 1991 | 56.6 mm (2.2 in) |
| 1992 | 47.2 mm (1.9 in) |
| 1993 | 37.3 mm (1.5 in) |
| 1994 | 89.9 mm (3.5 in) |
| 1995 | 49.0 mm (1.9 in) |
| 1996 | 73.4 mm (2.9 in) |
| 1997 | 47.1 mm (1.9 in) |
| 1998 | 37.6 mm (1.5 in) |
| 1999 | 27.7 mm (1.1 in) |
| 2000 | 68.9 mm (2.7 in) |
| 2001 | 31.5 mm (1.2 in) |
| 2002 | 25.7 mm (1.0 in) |
| 2003 | 66.8 mm (2.6 in) |
| 2004 | 36.4 mm (1.4 in) |
| 2005 | 46.5 mm (1.8 in) |
| 2007 | 39.4 mm (1.6 in) |
| 2008 | 38.9 mm (1.5 in) |
| 2009 | 70.1 mm (2.8 in) |
| 2010 | 49.1 mm (1.9 in) |
| 2011 | 42.8 mm (1.7 in) |
| 2012 | 46.0 mm (1.8 in) |
| 2013 | 28.8 mm (1.1 in) |
| 2014 | 42.7 mm (1.7 in) |
| 2015 | 48.1 mm (1.9 in) |
| 2016 | 41.9 mm (1.6 in) |
| 2017 | 57.5 mm (2.3 in) |
| 2018 | 53.9 mm (2.1 in) |
| 2019 | 54.6 mm (2.1 in) |
| 2020 | 71.2 mm (2.8 in) |
| 2021 | 38.5 mm (1.5 in) |
| 2022 | 70.7 mm (2.8 in) |
| 2023 | 38.6 mm (1.5 in) |
| 2024 | 35.0 mm (1.4 in) |
| 2025 | 37.8 mm (1.5 in) |
| 2026 | 31.8 mm (1.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1893 | 22 days |
| 1894 | 32 days |
| 1895 | 28 days |
| 1896 | 12 days |
| 1897 | 25 days |
| 1898 | 20 days |
| 1899 | 39 days |
| 1900 | 25 days |
| 1901 | 30 days |
| 1902 | 27 days |
| 1903 | 24 days |
| 1904 | 43 days |
| 1905 | 49 days |
| 1906 | 44 days |
| 1907 | 42 days |
| 1908 | 28 days |
| 1909 | 28 days |
| 1910 | 77 days |
| 1911 | 34 days |
| 1912 | 23 days |
| 1913 | 39 days |
| 1914 | 57 days |
| 1915 | 31 days |
| 1916 | 50 days |
| 1917 | 78 days |
| 1918 | 22 days |
| 1919 | 36 days |
| 1920 | 20 days |
| 1921 | 24 days |
| 1922 | 44 days |
| 1923 | 35 days |
| 1924 | 36 days |
| 1925 | 28 days |
| 1926 | 46 days |
| 1927 | 36 days |
| 1928 | 40 days |
| 1929 | 60 days |
| 1930 | 35 days |
| 1931 | 40 days |
| 1932 | 50 days |
| 1933 | 25 days |
| 1934 | 37 days |
| 1935 | 39 days |
| 1936 | 63 days |
| 1937 | 29 days |
| 1938 | 36 days |
| 1939 | 42 days |
| 1940 | 39 days |
| 1941 | 20 days |
| 1942 | 59 days |
| 1943 | 47 days |
| 1944 | 46 days |
| 1945 | 51 days |
| 1946 | 47 days |
| 1947 | 40 days |
| 1948 | 37 days |
| 1949 | 41 days |
| 1950 | 31 days |
| 1951 | 54 days |
| 1952 | 62 days |
| 1953 | 45 days |
| 1954 | 35 days |
| 1955 | 48 days |
| 1956 | 33 days |
| 1957 | 31 days |
| 1958 | 57 days |
| 1959 | 52 days |
| 1960 | 41 days |
| 1961 | 64 days |
| 1962 | 55 days |
| 1963 | 34 days |
| 1964 | 23 days |
| 1965 | 32 days |
| 1966 | 46 days |
| 1967 | 75 days |
| 1968 | 25 days |
| 1969 | 85 days |
| 1970 | 35 days |
| 1971 | 23 days |
| 1972 | 25 days |
| 1973 | 34 days |
| 1974 | 60 days |
| 1975 | 33 days |
| 1976 | 39 days |
| 1977 | 36 days |
| 1978 | 40 days |
| 1979 | 42 days |
| 1980 | 38 days |
| 1981 | 54 days |
| 1982 | 23 days |
| 1983 | 26 days |
| 1984 | 32 days |
| 1985 | 52 days |
| 1986 | 36 days |
| 1987 | 35 days |
| 1988 | 65 days |
| 1989 | 49 days |
| 1990 | 37 days |
| 1991 | 75 days |
| 1992 | 28 days |
| 1993 | 50 days |
| 1994 | 58 days |
| 1995 | 23 days |
| 1996 | 37 days |
| 1997 | 35 days |
| 1998 | 22 days |
| 1999 | 38 days |
| 2000 | 57 days |
| 2001 | 80 days |
| 2002 | 28 days |
| 2003 | 51 days |
| 2004 | 38 days |
| 2005 | 41 days |
| 2007 | 27 days |
| 2008 | 20 days |
| 2009 | 56 days |
| 2010 | 34 days |
| 2011 | 62 days |
| 2012 | 87 days |
| 2013 | 33 days |
| 2014 | 30 days |
| 2015 | 60 days |
| 2016 | 27 days |
| 2017 | 66 days |
| 2018 | 65 days |
| 2019 | 37 days |
| 2020 | 70 days |
| 2021 | 62 days |
| 2022 | 35 days |
| 2023 | 30 days |
| 2024 | 81 days |
| 2025 | 24 days |
| 2026 | 47 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
105 years with a frostAcross 105 years with a frost, the median last spring frost at Dayton 1 WSW falls on 30 April and the median first autumn frost on 10 October, which leaves a median of 164 days between them.
In 1988 to 2024 the median growing season was 175 days. That is 13 days more than in 1905 to 1939.
Fitted over all years, the growing season changes by +1.9 days per decade at this station.
| Measure | Median, all years | Earliest period (1905 to 1939) | Recent period (1988 to 2024) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 30 April | 4 May | 23 April | 11 days earlier | -1.4 days per decade |
| First autumn frost | 10 October | 11 October | 16 October | 5 days later | +0.4 days per decade |
| Growing days | 164 days | 162 days | 175 days | 13 days more | +1.9 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
110 years, 1900 to 2025A day with at least 26.2 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 55.9 mm (2.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 26.2 mm (1.0 in) | |
| 5 years | 33.7 mm (1.3 in) | |
| 10 years | 38.9 mm (1.5 in) | |
| 25 years | 45.6 mm (1.8 in) | |
| 50 years | 50.7 mm (2.0 in) | |
| 100 years | 55.9 mm (2.2 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 110 years of values from 1900 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: 55.4 mm (2.2 in) in 1994; 52.8 mm (2.1 in) in 1931; 52.3 mm (2.1 in) in 1917.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Dayton 1 WSW, at 1963 and 1985. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1963 ran 0.3 C (0.6 F) higher than in the years before (possible change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1985 ran 0.2 C (0.3 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1963 | +0.3 | +0.6 | possible | 5 |
| 1985 | -0.2 | -0.3 | 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.
Climate Twins
2003 to 2024 against 1961 to 1990Over 2003 to 2024, Dayton 1 WSW had a mean temperature of 10.6 C (51.1 F) and 471.8 mm (18.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Yreka (United States, 633 km away), Show Low AP (United States, 1,500 km away) and Orderville (United States, 1,099 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Yreka | United States | 633 km (393 mi) | 10.9 C (51.7 F) | 499.9 mm (19.7 in) | 0.72 |
| Show Low AP | United States | 1,500 km (932 mi) | 10.4 C (50.8 F) | 454.3 mm (17.9 in) | 0.80 |
| Orderville | United States | 1,099 km (683 mi) | 10.7 C (51.2 F) | 394.7 mm (15.5 in) | 0.81 |
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).