Jefferson Weather Records (USC00134228)
Record envelope, standing records and threshold days for Jefferson (USC00134228), Iowa, United States, with 134 years of record.
Key Facts for Jefferson
- Jefferson (USC00134228) is a weather station in Iowa, United States at 42.01 latitude and -94.40 longitude, 322 m (1,055 ft) above sea level.
- The station reports from 1893 to 2026, 134 years of record.
- 1,464 records set at Jefferson still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Jefferson set a daily record low maximum temperature of 20.6 C (69.1 F) on 6 August 2026.
About the Station
- Location: Iowa, United States, 42.01 latitude, -94.40 longitude.
- Elevation: 322 m (1,055 ft).
- Period of record: 1893 to 2026, 134 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
7 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 20.6 C (69.1 F) | -38.3 C (-36.9 F) | 16.1 C (61.0 F) | -26.1 C (-15.0 F) |
| Feb | 25.0 C (77.0 F) | -32.8 C (-27.0 F) | 19.4 C (66.9 F) | -20.6 C (-5.1 F) |
| Mar | 33.3 C (91.9 F) | -32.2 C (-26.0 F) | 33.3 C (91.9 F) | -15.6 C (3.9 F) |
| Apr | 35.6 C (96.1 F) | -14.4 C (6.1 F) | 29.4 C (84.9 F) | -0.6 C (30.9 F) |
| May | 40.0 C (104.0 F) | -7.2 C (19.0 F) | 31.7 C (89.1 F) | 3.9 C (39.0 F) |
| Jun | 40.0 C (104.0 F) | 0.0 C (32.0 F) | 32.8 C (91.0 F) | 10.6 C (51.1 F) |
| Jul | 43.9 C (111.0 F) | 4.4 C (39.9 F) | 35.6 C (96.1 F) | 13.9 C (57.0 F) |
| Aug | 41.7 C (107.1 F) | 0.0 C (32.0 F) | 32.8 C (91.0 F) | 11.7 C (53.1 F) |
| Sep | 38.9 C (102.0 F) | -5.6 C (21.9 F) | 33.3 C (91.9 F) | 12.2 C (54.0 F) |
| Oct | 35.6 C (96.1 F) | -21.1 C (-6.0 F) | n/a | n/a |
| Nov | 27.2 C (81.0 F) | -22.8 C (-9.0 F) | n/a | n/a |
| Dec | 21.7 C (71.1 F) | -32.2 C (-26.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1893 | 15 |
| 1894 | 22 |
| 1895 | 15 |
| 1905 | 1 |
| 1906 | 7 |
| 1907 | 14 |
| 1908 | 14 |
| 1909 | 11 |
| 1910 | 10 |
| 1911 | 30 |
| 1912 | 16 |
| 1913 | 15 |
| 1914 | 15 |
| 1915 | 18 |
| 1916 | 14 |
| 1917 | 21 |
| 1918 | 17 |
| 1919 | 13 |
| 1920 | 7 |
| 1921 | 12 |
| 1922 | 4 |
| 1923 | 13 |
| 1924 | 17 |
| 1925 | 24 |
| 1926 | 11 |
| 1927 | 14 |
| 1928 | 16 |
| 1929 | 10 |
| 1930 | 35 |
| 1931 | 14 |
| 1932 | 11 |
| 1933 | 6 |
| 1934 | 37 |
| 1935 | 12 |
| 1936 | 45 |
| 1937 | 21 |
| 1938 | 7 |
| 1939 | 27 |
| 1940 | 13 |
| 1941 | 13 |
| 1942 | 13 |
| 1943 | 5 |
| 1944 | 18 |
| 1945 | 10 |
| 1946 | 10 |
| 1947 | 12 |
| 1948 | 12 |
| 1949 | 3 |
| 1950 | 14 |
| 1951 | 11 |
| 1952 | 6 |
| 1953 | 12 |
| 1954 | 7 |
| 1955 | 18 |
| 1956 | 5 |
| 1957 | 3 |
| 1958 | 7 |
| 1959 | 15 |
| 1960 | 10 |
| 1961 | 6 |
| 1962 | 10 |
| 1963 | 13 |
| 1964 | 8 |
| 1965 | 10 |
| 1966 | 9 |
| 1967 | 10 |
| 1968 | 9 |
| 1969 | 8 |
| 1970 | 16 |
| 1971 | 7 |
| 1972 | 11 |
| 1973 | 6 |
| 1974 | 9 |
| 1975 | 6 |
| 1976 | 12 |
| 1977 | 18 |
| 1978 | 1 |
| 1979 | 7 |
| 1980 | 11 |
| 1981 | 15 |
| 1982 | 5 |
| 1983 | 21 |
| 1984 | 9 |
| 1985 | 9 |
| 1986 | 13 |
| 1987 | 13 |
| 1988 | 17 |
| 1989 | 16 |
| 1990 | 15 |
| 1991 | 16 |
| 1992 | 15 |
| 1993 | 6 |
| 1994 | 7 |
| 1995 | 10 |
| 1996 | 11 |
| 1997 | 8 |
| 1998 | 12 |
| 1999 | 7 |
| 2000 | 15 |
| 2001 | 8 |
| 2002 | 10 |
| 2003 | 8 |
| 2004 | 6 |
| 2005 | 8 |
| 2006 | 9 |
| 2007 | 6 |
| 2008 | 6 |
| 2009 | 8 |
| 2010 | 6 |
| 2011 | 9 |
| 2012 | 24 |
| 2013 | 9 |
| 2014 | 14 |
| 2015 | 6 |
| 2016 | 1 |
| 2019 | 2 |
| 2020 | 12 |
| 2021 | 12 |
| 2022 | 12 |
| 2023 | 6 |
| 2024 | 9 |
| 2025 | 12 |
| 2026 | 6 |
All-Time Record Progression
7 new records| Date | Kind | Detail |
|---|---|---|
| 1935-06-18 | Record daily precipitation | Record daily precipitation 104.1 mm (4.1 in) |
| 1942-01-01 | Record daily snowfall | Record daily snowfall 35.6 cm (14.0 in) |
| 1943-08-12 | Record daily precipitation | Record daily precipitation 134.1 mm (5.3 in) |
| 1954-08-22 | Record daily precipitation | Record daily precipitation 139.7 mm (5.5 in) |
| 1979-02-08 | Record snow depth | Record snow depth 61.0 cm (24.0 in) |
| 1986-06-30 | Record daily precipitation | Record daily precipitation 140.0 mm (5.5 in) |
| 1993-07-09 | Record daily precipitation | Record daily precipitation 198.9 mm (7.8 in) |
Wettest Day of Each Month
Jul: 198.9 mm (7.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 41.7 mm (1.6 in) | 3 January 1971 |
| Feb | 41.1 mm (1.6 in) | 27 February 1948 |
| Mar | 65.5 mm (2.6 in) | 23 March 1991 |
| Apr | 124.5 mm (4.9 in) | 24 April 1955 |
| May | 149.9 mm (5.9 in) | 30 May 2008 |
| Jun | 140.0 mm (5.5 in) | 30 June 1986 |
| Jul | 198.9 mm (7.8 in) | 9 July 1993 |
| Aug | 139.7 mm (5.5 in) | 22 August 1954 |
| Sep | 118.6 mm (4.7 in) | 13 September 1978 |
| Oct | 60.5 mm (2.4 in) | 25 October 2021 |
| Nov | 72.4 mm (2.9 in) | 23 November 1931 |
| Dec | 48.8 mm (1.9 in) | 28 December 1982 |
Period of Record Coverage
1893 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1893 | 313 | 86% | No |
| 1894 | 145 | 40% | No |
| 1895 | 196 | 54% | No |
| 1905 | 197 | 54% | No |
| 1906 | 326 | 89% | No |
| 1907 | 273 | 75% | No |
| 1908 | 270 | 74% | No |
| 1909 | 263 | 72% | No |
| 1910 | 177 | 48% | No |
| 1911 | 360 | 99% | Yes |
| 1912 | 365 | 100% | Yes |
| 1913 | 279 | 76% | No |
| 1914 | 362 | 99% | Yes |
| 1915 | 364 | 100% | Yes |
| 1916 | 362 | 99% | Yes |
| 1917 | 365 | 100% | Yes |
| 1918 | 362 | 99% | Yes |
| 1919 | 360 | 99% | Yes |
| 1920 | 365 | 100% | Yes |
| 1921 | 363 | 99% | Yes |
| 1922 | 353 | 97% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 359 | 98% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 353 | 97% | Yes |
| 1928 | 328 | 90% | No |
| 1929 | 353 | 97% | Yes |
| 1930 | 364 | 100% | Yes |
| 1931 | 361 | 99% | Yes |
| 1932 | 364 | 99% | Yes |
| 1933 | 364 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 364 | 100% | Yes |
| 1938 | 364 | 100% | Yes |
| 1939 | 364 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 336 | 92% | Yes |
| 1948 | 364 | 99% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 363 | 99% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 325 | 89% | No |
| 1953 | 360 | 99% | Yes |
| 1954 | 363 | 99% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 356 | 98% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 361 | 99% | Yes |
| 1961 | 363 | 99% | Yes |
| 1962 | 363 | 99% | Yes |
| 1963 | 324 | 89% | No |
| 1964 | 365 | 100% | Yes |
| 1965 | 300 | 82% | No |
| 1966 | 151 | 41% | No |
| 1967 | 365 | 100% | Yes |
| 1968 | 365 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 363 | 99% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 363 | 99% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 363 | 99% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 361 | 99% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 364 | 99% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 360 | 99% | Yes |
| 1988 | 362 | 99% | Yes |
| 1989 | 355 | 97% | Yes |
| 1990 | 347 | 95% | Yes |
| 1991 | 358 | 98% | Yes |
| 1992 | 358 | 98% | Yes |
| 1993 | 357 | 98% | Yes |
| 1994 | 360 | 99% | Yes |
| 1995 | 357 | 98% | Yes |
| 1996 | 358 | 98% | Yes |
| 1997 | 363 | 99% | Yes |
| 1998 | 361 | 99% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 364 | 99% | Yes |
| 2013 | 362 | 99% | Yes |
| 2014 | 359 | 98% | Yes |
| 2015 | 364 | 100% | Yes |
| 2016 | 75 | 20% | No |
| 2019 | 157 | 43% | No |
| 2020 | 360 | 98% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 363 | 99% | Yes |
| 2024 | 336 | 92% | Yes |
| 2025 | 333 | 91% | Yes |
| 2026 | 183 | 50% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 6 August 2026 | Jefferson, US | daily low max | 20.6 C (69.1 F) | 1.1 C (2.0 F) | 77 years | 35 of 100 (Notable) |
| 22 June 2026 | Jefferson, US | daily low max | 19.4 C (66.9 F) | 1.7 C (3.1 F) | 130 years | 43 of 100 (Notable) |
| 22 March 2026 | Jefferson, US | monthly high max | 33.3 C (91.9 F) | 0.5 C (0.9 F) | 39 years | 31 of 100 (Routine) |
| 17 March 2026 | Jefferson, US | daily low min (Tie) | -15.6 C (3.9 F) | tie | 120 years | 10 of 100 (Routine) |
| 10 March 2026 | Jefferson, US | daily high max (Tie) | 21.7 C (71.1 F) | tie | 108 years | 10 of 100 (Routine) |
| 7 March 2026 | Jefferson, US | daily rain | 24.4 mm (1.0 in) | 3.8 mm (0.15 in) | 43 years | 20 of 100 (Routine) |
| 16 February 2026 | Jefferson, US | daily high max | 18.3 C (64.9 F) | 0.5 C (0.9 F) | 44 years | 23 of 100 (Routine) |
| 10 February 2026 | Jefferson, US | daily high max | 19.4 C (66.9 F) | 0.5 C (0.9 F) | 48 years | 24 of 100 (Routine) |
| 25 January 2026 | Jefferson, US | daily low max | -15.6 C (3.9 F) | 0.6 C (1.1 F) | 90 years | 37 of 100 (Notable) |
| 24 January 2026 | Jefferson, US | daily low max (Tie) | -20.0 C (-4.0 F) | tie | 90 years | 9 of 100 (Routine) |
| 24 January 2026 | Jefferson, US | daily low min (Tie) | -26.1 C (-15.0 F) | tie | 64 years | 7 of 100 (Routine) |
| 9 January 2026 | Jefferson, US | daily rain | 26.9 mm (1.1 in) | 14.2 mm (0.6 in) | 96 years | 64 of 100 (Major) |
| 8 January 2026 | Jefferson, US | daily high max (Tie) | 16.1 C (61.0 F) | tie | 23 years | 4 of 100 (Routine) |
| 27 December 2025 | Jefferson, US | daily high min | 2.8 C (37.0 F) | 1.7 C (3.1 F) | 94 years | 40 of 100 (Notable) |
| 5 December 2025 | Jefferson, US | daily low min | -22.8 C (-9.0 F) | 1.7 C (3.1 F) | 96 years | 41 of 100 (Notable) |
| 4 December 2025 | Jefferson, US | daily low min | -22.8 C (-9.0 F) | 2.2 C (4.0 F) | 131 years | 43 of 100 (Notable) |
| 25 November 2025 | Jefferson, US | daily high min | 7.2 C (45.0 F) | 1.1 C (2.0 F) | 64 years | 30 of 100 (Routine) |
| 15 November 2025 | Jefferson, US | daily high max | 23.9 C (75.0 F) | 2.8 C (5.0 F) | 76 years | 37 of 100 (Notable) |
| 10 November 2025 | Jefferson, US | daily low max | -3.3 C (26.1 F) | 0.5 C (0.9 F) | 75 years | 32 of 100 (Routine) |
| 6 October 2025 | Jefferson, US | daily rain | 36.8 mm (1.4 in) | 1.5 mm (0.06 in) | 111 years | 41 of 100 (Notable) |
Climate Trend
102 complete years, 1911 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1911 | 10.2 C | +0.81 C |
| 1912 | 7.7 C | -1.68 C |
| 1914 | 9.6 C | +0.17 C |
| 1915 | 8.6 C | -0.81 C |
| 1916 | 8.4 C | -1.01 C |
| 1917 | 7.1 C | -2.28 C |
| 1918 | 9.8 C | +0.35 C |
| 1919 | 8.9 C | -0.54 C |
| 1920 | 8.7 C | -0.69 C |
| 1921 | 10.9 C | +1.51 C |
| 1923 | 9.0 C | -0.44 C |
| 1924 | 7.4 C | -1.98 C |
| 1925 | 8.9 C | -0.53 C |
| 1926 | 8.8 C | -0.60 C |
| 1927 | 9.0 C | -0.40 C |
| 1929 | 7.9 C | -1.55 C |
| 1930 | 10.2 C | +0.76 C |
| 1931 | 11.7 C | +2.33 C |
| 1932 | 8.7 C | -0.71 C |
| 1933 | 10.2 C | +0.83 C |
| 1934 | 10.4 C | +1.02 C |
| 1935 | 8.6 C | -0.76 C |
| 1936 | 8.5 C | -0.91 C |
| 1937 | 8.4 C | -0.99 C |
| 1938 | 10.7 C | +1.32 C |
| 1939 | 10.8 C | +1.37 C |
| 1940 | 8.7 C | -0.75 C |
| 1941 | 10.5 C | +1.14 C |
| 1942 | 9.4 C | -0.01 C |
| 1943 | 8.9 C | -0.51 C |
| 1944 | 9.4 C | +0.01 C |
| 1945 | 8.7 C | -0.70 C |
| 1946 | 10.1 C | +0.67 C |
| 1948 | 9.5 C | +0.08 C |
| 1949 | 9.6 C | +0.16 C |
| 1950 | 8.0 C | -1.45 C |
| 1951 | 7.7 C | -1.73 C |
| 1953 | 10.4 C | +1.01 C |
| 1954 | 10.5 C | +1.10 C |
| 1955 | 9.6 C | +0.18 C |
| 1956 | 9.8 C | +0.37 C |
| 1957 | 9.4 C | +0.04 C |
| 1958 | 9.3 C | -0.14 C |
| 1959 | 9.2 C | -0.16 C |
| 1960 | 8.7 C | -0.72 C |
| 1961 | 9.2 C | -0.20 C |
| 1962 | 9.1 C | -0.30 C |
| 1964 | 10.2 C | +0.76 C |
| 1967 | 8.9 C | -0.49 C |
| 1968 | 9.7 C | +0.27 C |
| 1969 | 8.6 C | -0.83 C |
| 1970 | 9.3 C | -0.12 C |
| 1971 | 9.7 C | +0.27 C |
| 1972 | 8.5 C | -0.88 C |
| 1973 | 10.5 C | +1.12 C |
| 1974 | 10.1 C | +0.72 C |
| 1975 | 9.6 C | +0.24 C |
| 1976 | 9.9 C | +0.53 C |
| 1977 | 10.5 C | +1.14 C |
| 1978 | 8.6 C | -0.81 C |
| 1979 | 8.4 C | -1.03 C |
| 1980 | 10.3 C | +0.94 C |
| 1981 | 10.8 C | +1.40 C |
| 1982 | 9.3 C | -0.13 C |
| 1983 | 9.9 C | +0.50 C |
| 1984 | 10.2 C | +0.78 C |
| 1985 | 9.1 C | -0.26 C |
| 1986 | 10.6 C | +1.21 C |
| 1987 | 11.9 C | +2.54 C |
| 1988 | 10.7 C | +1.29 C |
| 1989 | 9.6 C | +0.17 C |
| 1990 | 10.8 C | +1.42 C |
| 1991 | 10.1 C | +0.73 C |
| 1992 | 10.0 C | +0.55 C |
| 1993 | 8.5 C | -0.92 C |
| 1994 | 9.6 C | +0.16 C |
| 1995 | 9.5 C | +0.13 C |
| 1996 | 8.4 C | -1.05 C |
| 1997 | 9.3 C | -0.07 C |
| 1998 | 10.5 C | +1.14 C |
| 1999 | 9.9 C | +0.53 C |
| 2000 | 9.6 C | +0.16 C |
| 2001 | 9.7 C | +0.31 C |
| 2002 | 9.6 C | +0.24 C |
| 2003 | 9.0 C | -0.44 C |
| 2004 | 9.3 C | -0.11 C |
| 2005 | 9.9 C | +0.54 C |
| 2006 | 10.4 C | +0.96 C |
| 2007 | 9.5 C | +0.14 C |
| 2008 | 7.6 C | -1.78 C |
| 2009 | 7.9 C | -1.54 C |
| 2010 | 8.5 C | -0.91 C |
| 2011 | 8.7 C | -0.69 C |
| 2012 | 10.9 C | +1.51 C |
| 2013 | 7.9 C | -1.51 C |
| 2014 | 7.5 C | -1.87 C |
| 2015 | 9.4 C | -0.05 C |
| 2020 | 9.4 C | -0.02 C |
| 2021 | 10.0 C | +0.55 C |
| 2022 | 8.4 C | -1.04 C |
| 2023 | 9.9 C | +0.53 C |
| 2025 | 9.7 C | +0.30 C |
The fitted trend in annual mean temperature here over 1911 to 2025 is 0.03 C (-0.03 to 0.09) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.06 F (-0.05 to 0.16) per decade. The slope is a straight line fitted to 102 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 (-0.03 to 0.09) per decade | 0.06 F (-0.05 to 0.16) per decade | 1911 to 2025 | 102 | Not clearly different from zero |
| Mean daily maximum | 0.03 C (-0.04 to 0.10) per decade | 0.05 F (-0.08 to 0.18) per decade | 1911 to 2025 | 102 | Not clearly different from zero |
| Mean daily minimum | 0.04 C (-0.02 to 0.09) per decade | 0.06 F (-0.03 to 0.16) per decade | 1911 to 2025 | 102 | 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) | 43.9 C (111.0 F) | 1911 | 36.1 C (97.0 F) | 123 |
| Coldest night (TNn) | -38.3 C (-36.9 F) | 1912 | -26.7 C (-16.1 F) | 123 |
| Wettest day (Rx1day) | 198.9 mm (7.8 in) | 1993 | 60.5 mm (2.4 in) | 127 |
| Wettest five days (Rx5day) | 232.6 mm (9.2 in) | 1993 | 92.4 mm (3.6 in) | 127 |
| Longest dry spell (CDD) | 60 days | 1962 | 26 days | 127 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1893 | 35.6 C (96.1 F) |
| 1894 | 42.2 C (108.0 F) |
| 1895 | 35.0 C (95.0 F) |
| 1901 | n/a |
| 1902 | n/a |
| 1903 | n/a |
| 1904 | n/a |
| 1905 | 36.7 C (98.1 F) |
| 1906 | 35.6 C (96.1 F) |
| 1907 | 36.1 C (97.0 F) |
| 1908 | 35.0 C (95.0 F) |
| 1909 | 35.6 C (96.1 F) |
| 1910 | 35.0 C (95.0 F) |
| 1911 | 43.9 C (111.0 F) |
| 1912 | 37.2 C (99.0 F) |
| 1913 | 38.9 C (102.0 F) |
| 1914 | 36.7 C (98.1 F) |
| 1915 | 32.2 C (90.0 F) |
| 1916 | 38.3 C (100.9 F) |
| 1917 | 36.7 C (98.1 F) |
| 1918 | 39.4 C (102.9 F) |
| 1919 | 36.1 C (97.0 F) |
| 1920 | 33.9 C (93.0 F) |
| 1921 | 36.1 C (97.0 F) |
| 1922 | 35.0 C (95.0 F) |
| 1923 | 35.0 C (95.0 F) |
| 1924 | 33.3 C (91.9 F) |
| 1925 | 37.8 C (100.0 F) |
| 1926 | 37.8 C (100.0 F) |
| 1927 | 36.1 C (97.0 F) |
| 1928 | 33.9 C (93.0 F) |
| 1929 | 35.0 C (95.0 F) |
| 1930 | 40.6 C (105.1 F) |
| 1931 | 38.3 C (100.9 F) |
| 1932 | 35.6 C (96.1 F) |
| 1933 | 38.3 C (100.9 F) |
| 1934 | 41.7 C (107.1 F) |
| 1935 | 37.2 C (99.0 F) |
| 1936 | 42.2 C (108.0 F) |
| 1937 | 37.8 C (100.0 F) |
| 1938 | 36.1 C (97.0 F) |
| 1939 | 38.9 C (102.0 F) |
| 1940 | 40.0 C (104.0 F) |
| 1941 | 38.9 C (102.0 F) |
| 1942 | 35.6 C (96.1 F) |
| 1943 | 35.0 C (95.0 F) |
| 1944 | 36.1 C (97.0 F) |
| 1945 | 35.0 C (95.0 F) |
| 1946 | 36.7 C (98.1 F) |
| 1947 | 39.4 C (102.9 F) |
| 1948 | 37.2 C (99.0 F) |
| 1949 | 34.4 C (93.9 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 33.9 C (93.0 F) |
| 1952 | 35.6 C (96.1 F) |
| 1953 | 36.7 C (98.1 F) |
| 1954 | 38.3 C (100.9 F) |
| 1955 | 39.4 C (102.9 F) |
| 1956 | 37.2 C (99.0 F) |
| 1957 | 36.7 C (98.1 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 36.7 C (98.1 F) |
| 1960 | 36.7 C (98.1 F) |
| 1961 | 35.6 C (96.1 F) |
| 1962 | 33.9 C (93.0 F) |
| 1963 | 38.3 C (100.9 F) |
| 1964 | 35.0 C (95.0 F) |
| 1965 | 39.4 C (102.9 F) |
| 1966 | 31.1 C (88.0 F) |
| 1967 | 36.7 C (98.1 F) |
| 1968 | 36.7 C (98.1 F) |
| 1969 | 34.4 C (93.9 F) |
| 1970 | 36.1 C (97.0 F) |
| 1971 | 35.6 C (96.1 F) |
| 1972 | 35.6 C (96.1 F) |
| 1973 | 35.0 C (95.0 F) |
| 1974 | 41.7 C (107.1 F) |
| 1975 | 36.1 C (97.0 F) |
| 1976 | 36.7 C (98.1 F) |
| 1977 | 39.4 C (102.9 F) |
| 1978 | 37.2 C (99.0 F) |
| 1979 | 35.0 C (95.0 F) |
| 1980 | 39.4 C (102.9 F) |
| 1981 | 37.2 C (99.0 F) |
| 1982 | 36.1 C (97.0 F) |
| 1983 | 39.4 C (102.9 F) |
| 1984 | 40.0 C (104.0 F) |
| 1985 | 38.9 C (102.0 F) |
| 1986 | 35.6 C (96.1 F) |
| 1987 | 38.9 C (102.0 F) |
| 1988 | 41.1 C (106.0 F) |
| 1989 | 37.2 C (99.0 F) |
| 1990 | 37.2 C (99.0 F) |
| 1991 | 36.1 C (97.0 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 32.8 C (91.0 F) |
| 1994 | 35.0 C (95.0 F) |
| 1995 | 38.3 C (100.9 F) |
| 1996 | 33.9 C (93.0 F) |
| 1997 | 35.0 C (95.0 F) |
| 1998 | 36.7 C (98.1 F) |
| 1999 | 37.8 C (100.0 F) |
| 2000 | 38.3 C (100.9 F) |
| 2001 | 36.1 C (97.0 F) |
| 2002 | 36.1 C (97.0 F) |
| 2003 | 38.3 C (100.9 F) |
| 2004 | 33.3 C (91.9 F) |
| 2005 | 36.7 C (98.1 F) |
| 2006 | 36.1 C (97.0 F) |
| 2007 | 35.6 C (96.1 F) |
| 2008 | 33.9 C (93.0 F) |
| 2009 | 33.9 C (93.0 F) |
| 2010 | 33.3 C (91.9 F) |
| 2011 | 37.8 C (100.0 F) |
| 2012 | 38.3 C (100.9 F) |
| 2013 | 38.3 C (100.9 F) |
| 2014 | 33.3 C (91.9 F) |
| 2015 | 35.0 C (95.0 F) |
| 2016 | 22.2 C (72.0 F) |
| 2019 | 31.7 C (89.1 F) |
| 2020 | 35.0 C (95.0 F) |
| 2021 | 36.7 C (98.1 F) |
| 2022 | 36.1 C (97.0 F) |
| 2023 | 36.7 C (98.1 F) |
| 2024 | 35.6 C (96.1 F) |
| 2025 | 35.6 C (96.1 F) |
| 2026 | 35.6 C (96.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1893 | -30.0 C (-22.0 F) |
| 1894 | -23.3 C (-9.9 F) |
| 1895 | -28.9 C (-20.0 F) |
| 1901 | n/a |
| 1902 | n/a |
| 1903 | n/a |
| 1904 | n/a |
| 1905 | -18.3 C (-0.9 F) |
| 1906 | -27.8 C (-18.0 F) |
| 1907 | -29.4 C (-20.9 F) |
| 1908 | -23.9 C (-11.0 F) |
| 1909 | -26.7 C (-16.1 F) |
| 1910 | -23.3 C (-9.9 F) |
| 1911 | -30.0 C (-22.0 F) |
| 1912 | -38.3 C (-36.9 F) |
| 1913 | -26.7 C (-16.1 F) |
| 1914 | -32.2 C (-26.0 F) |
| 1915 | -33.3 C (-27.9 F) |
| 1916 | -33.9 C (-29.0 F) |
| 1917 | -32.2 C (-26.0 F) |
| 1918 | -32.8 C (-27.0 F) |
| 1919 | -31.7 C (-25.1 F) |
| 1920 | -25.6 C (-14.1 F) |
| 1921 | -25.6 C (-14.1 F) |
| 1922 | -27.2 C (-17.0 F) |
| 1923 | -28.3 C (-18.9 F) |
| 1924 | -33.3 C (-27.9 F) |
| 1925 | -25.6 C (-14.1 F) |
| 1926 | -23.3 C (-9.9 F) |
| 1927 | -26.1 C (-15.0 F) |
| 1928 | -23.9 C (-11.0 F) |
| 1929 | -27.2 C (-17.0 F) |
| 1930 | -29.4 C (-20.9 F) |
| 1931 | -20.0 C (-4.0 F) |
| 1932 | -28.9 C (-20.0 F) |
| 1933 | -30.6 C (-23.1 F) |
| 1934 | -23.3 C (-9.9 F) |
| 1935 | -28.9 C (-20.0 F) |
| 1936 | -32.2 C (-26.0 F) |
| 1937 | -28.3 C (-18.9 F) |
| 1938 | -23.9 C (-11.0 F) |
| 1939 | -23.9 C (-11.0 F) |
| 1940 | -29.4 C (-20.9 F) |
| 1941 | -19.4 C (-2.9 F) |
| 1942 | -29.4 C (-20.9 F) |
| 1943 | -27.8 C (-18.0 F) |
| 1944 | -26.7 C (-16.1 F) |
| 1945 | -23.9 C (-11.0 F) |
| 1946 | -26.1 C (-15.0 F) |
| 1947 | -27.2 C (-17.0 F) |
| 1948 | -28.3 C (-18.9 F) |
| 1949 | -27.2 C (-17.0 F) |
| 1950 | -26.1 C (-15.0 F) |
| 1951 | -26.7 C (-16.1 F) |
| 1952 | -24.4 C (-11.9 F) |
| 1953 | -24.4 C (-11.9 F) |
| 1954 | -27.2 C (-17.0 F) |
| 1955 | -27.2 C (-17.0 F) |
| 1956 | -27.8 C (-18.0 F) |
| 1957 | -31.7 C (-25.1 F) |
| 1958 | -30.0 C (-22.0 F) |
| 1959 | -25.0 C (-13.0 F) |
| 1960 | -27.2 C (-17.0 F) |
| 1961 | -26.1 C (-15.0 F) |
| 1962 | -32.2 C (-26.0 F) |
| 1963 | -30.0 C (-22.0 F) |
| 1964 | -23.9 C (-11.0 F) |
| 1965 | -26.1 C (-15.0 F) |
| 1966 | -31.7 C (-25.1 F) |
| 1967 | -27.8 C (-18.0 F) |
| 1968 | -27.2 C (-17.0 F) |
| 1969 | -25.6 C (-14.1 F) |
| 1970 | -31.7 C (-25.1 F) |
| 1971 | -28.9 C (-20.0 F) |
| 1972 | -31.1 C (-24.0 F) |
| 1973 | -26.7 C (-16.1 F) |
| 1974 | -31.1 C (-24.0 F) |
| 1975 | -26.1 C (-15.0 F) |
| 1976 | -27.2 C (-17.0 F) |
| 1977 | -29.4 C (-20.9 F) |
| 1978 | -26.1 C (-15.0 F) |
| 1979 | -31.7 C (-25.1 F) |
| 1980 | -23.9 C (-11.0 F) |
| 1981 | -28.9 C (-20.0 F) |
| 1982 | -30.0 C (-22.0 F) |
| 1983 | -29.4 C (-20.9 F) |
| 1984 | -26.7 C (-16.1 F) |
| 1985 | -28.9 C (-20.0 F) |
| 1986 | -26.7 C (-16.1 F) |
| 1987 | -26.1 C (-15.0 F) |
| 1988 | -28.3 C (-18.9 F) |
| 1989 | -31.1 C (-24.0 F) |
| 1990 | -26.1 C (-15.0 F) |
| 1991 | -26.7 C (-16.1 F) |
| 1992 | -23.3 C (-9.9 F) |
| 1993 | -23.9 C (-11.0 F) |
| 1994 | -29.4 C (-20.9 F) |
| 1995 | -22.2 C (-8.0 F) |
| 1996 | -32.8 C (-27.0 F) |
| 1997 | -25.0 C (-13.0 F) |
| 1998 | -23.9 C (-11.0 F) |
| 1999 | -28.3 C (-18.9 F) |
| 2000 | -25.0 C (-13.0 F) |
| 2001 | -23.3 C (-9.9 F) |
| 2002 | -20.6 C (-5.1 F) |
| 2003 | -22.8 C (-9.0 F) |
| 2004 | -23.3 C (-9.9 F) |
| 2005 | -24.4 C (-11.9 F) |
| 2006 | -23.9 C (-11.0 F) |
| 2007 | -25.6 C (-14.1 F) |
| 2008 | -26.1 C (-15.0 F) |
| 2009 | -31.7 C (-25.1 F) |
| 2010 | -31.1 C (-24.0 F) |
| 2011 | -26.1 C (-15.0 F) |
| 2012 | -21.7 C (-7.1 F) |
| 2013 | -27.2 C (-17.0 F) |
| 2014 | -26.7 C (-16.1 F) |
| 2015 | -26.1 C (-15.0 F) |
| 2016 | -23.9 C (-11.0 F) |
| 2019 | -19.4 C (-2.9 F) |
| 2020 | -24.4 C (-11.9 F) |
| 2021 | -30.0 C (-22.0 F) |
| 2022 | -26.1 C (-15.0 F) |
| 2023 | -25.0 C (-13.0 F) |
| 2024 | -28.9 C (-20.0 F) |
| 2025 | -27.8 C (-18.0 F) |
| 2026 | -26.1 C (-15.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1893 | 59.7 mm (2.4 in) |
| 1894 | 39.4 mm (1.6 in) |
| 1895 | 50.8 mm (2.0 in) |
| 1901 | 71.6 mm (2.8 in) |
| 1902 | 95.3 mm (3.8 in) |
| 1903 | 102.1 mm (4.0 in) |
| 1904 | 45.0 mm (1.8 in) |
| 1905 | 41.7 mm (1.6 in) |
| 1906 | 54.1 mm (2.1 in) |
| 1907 | 50.8 mm (2.0 in) |
| 1908 | 35.8 mm (1.4 in) |
| 1909 | 68.8 mm (2.7 in) |
| 1910 | 31.8 mm (1.3 in) |
| 1911 | 33.0 mm (1.3 in) |
| 1912 | 58.9 mm (2.3 in) |
| 1913 | 53.6 mm (2.1 in) |
| 1914 | 69.3 mm (2.7 in) |
| 1915 | 71.6 mm (2.8 in) |
| 1916 | 47.8 mm (1.9 in) |
| 1917 | 92.7 mm (3.6 in) |
| 1918 | 54.6 mm (2.1 in) |
| 1919 | 80.0 mm (3.1 in) |
| 1920 | 45.0 mm (1.8 in) |
| 1921 | 77.5 mm (3.1 in) |
| 1922 | 41.9 mm (1.6 in) |
| 1923 | 41.4 mm (1.6 in) |
| 1924 | 53.6 mm (2.1 in) |
| 1925 | 95.5 mm (3.8 in) |
| 1926 | 103.4 mm (4.1 in) |
| 1927 | 44.2 mm (1.7 in) |
| 1928 | 53.3 mm (2.1 in) |
| 1929 | 37.1 mm (1.5 in) |
| 1930 | 45.5 mm (1.8 in) |
| 1931 | 93.5 mm (3.7 in) |
| 1932 | 79.5 mm (3.1 in) |
| 1933 | 77.0 mm (3.0 in) |
| 1934 | 56.6 mm (2.2 in) |
| 1935 | 104.1 mm (4.1 in) |
| 1936 | 85.6 mm (3.4 in) |
| 1937 | 41.7 mm (1.6 in) |
| 1938 | 57.7 mm (2.3 in) |
| 1939 | 55.4 mm (2.2 in) |
| 1940 | 59.4 mm (2.3 in) |
| 1941 | 46.2 mm (1.8 in) |
| 1942 | 65.3 mm (2.6 in) |
| 1943 | 134.1 mm (5.3 in) |
| 1944 | 66.0 mm (2.6 in) |
| 1945 | 69.1 mm (2.7 in) |
| 1946 | 65.3 mm (2.6 in) |
| 1947 | 70.4 mm (2.8 in) |
| 1948 | 70.4 mm (2.8 in) |
| 1949 | 40.6 mm (1.6 in) |
| 1950 | 69.3 mm (2.7 in) |
| 1951 | 76.2 mm (3.0 in) |
| 1952 | 65.5 mm (2.6 in) |
| 1953 | 77.5 mm (3.1 in) |
| 1954 | 139.7 mm (5.5 in) |
| 1955 | 124.5 mm (4.9 in) |
| 1956 | 53.6 mm (2.1 in) |
| 1957 | 101.1 mm (4.0 in) |
| 1958 | 69.6 mm (2.7 in) |
| 1959 | 76.7 mm (3.0 in) |
| 1960 | 58.4 mm (2.3 in) |
| 1961 | 56.4 mm (2.2 in) |
| 1962 | 55.9 mm (2.2 in) |
| 1963 | 77.7 mm (3.1 in) |
| 1964 | 64.0 mm (2.5 in) |
| 1965 | 61.5 mm (2.4 in) |
| 1966 | 33.3 mm (1.3 in) |
| 1967 | 49.5 mm (1.9 in) |
| 1968 | 58.2 mm (2.3 in) |
| 1969 | 43.7 mm (1.7 in) |
| 1970 | 67.1 mm (2.6 in) |
| 1971 | 54.4 mm (2.1 in) |
| 1972 | 38.4 mm (1.5 in) |
| 1973 | 89.2 mm (3.5 in) |
| 1974 | 47.2 mm (1.9 in) |
| 1975 | 47.0 mm (1.9 in) |
| 1976 | 47.5 mm (1.9 in) |
| 1977 | 57.9 mm (2.3 in) |
| 1978 | 118.6 mm (4.7 in) |
| 1979 | 86.9 mm (3.4 in) |
| 1980 | 63.5 mm (2.5 in) |
| 1981 | 95.8 mm (3.8 in) |
| 1982 | 48.8 mm (1.9 in) |
| 1983 | 54.6 mm (2.1 in) |
| 1984 | 63.2 mm (2.5 in) |
| 1985 | 31.2 mm (1.2 in) |
| 1986 | 140.0 mm (5.5 in) |
| 1987 | 65.3 mm (2.6 in) |
| 1988 | 70.6 mm (2.8 in) |
| 1989 | 42.7 mm (1.7 in) |
| 1990 | 65.0 mm (2.6 in) |
| 1991 | 92.2 mm (3.6 in) |
| 1992 | 115.1 mm (4.5 in) |
| 1993 | 198.9 mm (7.8 in) |
| 1994 | 38.6 mm (1.5 in) |
| 1995 | 67.6 mm (2.7 in) |
| 1996 | 84.1 mm (3.3 in) |
| 1997 | 74.4 mm (2.9 in) |
| 1998 | 51.1 mm (2.0 in) |
| 1999 | 47.8 mm (1.9 in) |
| 2000 | 37.8 mm (1.5 in) |
| 2001 | 64.0 mm (2.5 in) |
| 2002 | 52.8 mm (2.1 in) |
| 2003 | 117.1 mm (4.6 in) |
| 2004 | 58.9 mm (2.3 in) |
| 2005 | 56.4 mm (2.2 in) |
| 2006 | 109.5 mm (4.3 in) |
| 2007 | 68.3 mm (2.7 in) |
| 2008 | 149.9 mm (5.9 in) |
| 2009 | 56.1 mm (2.2 in) |
| 2010 | 70.1 mm (2.8 in) |
| 2011 | 32.3 mm (1.3 in) |
| 2012 | 37.1 mm (1.5 in) |
| 2013 | 104.1 mm (4.1 in) |
| 2014 | 67.8 mm (2.7 in) |
| 2015 | 97.8 mm (3.9 in) |
| 2016 | 19.6 mm (0.8 in) |
| 2019 | 50.3 mm (2.0 in) |
| 2020 | 46.5 mm (1.8 in) |
| 2021 | 60.5 mm (2.4 in) |
| 2022 | 54.6 mm (2.1 in) |
| 2023 | 79.2 mm (3.1 in) |
| 2024 | 43.7 mm (1.7 in) |
| 2025 | 88.4 mm (3.5 in) |
| 2026 | 57.2 mm (2.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1893 | 29.2 mm (1.1 in) |
| 1894 | 50.0 mm (2.0 in) |
| 1895 | 68.7 mm (2.7 in) |
| 1901 | 87.6 mm (3.4 in) |
| 1902 | 165.2 mm (6.5 in) |
| 1903 | 209.3 mm (8.2 in) |
| 1904 | 89.4 mm (3.5 in) |
| 1905 | 69.2 mm (2.7 in) |
| 1906 | 75.7 mm (3.0 in) |
| 1907 | 57.6 mm (2.3 in) |
| 1908 | 94.5 mm (3.7 in) |
| 1909 | 108.2 mm (4.3 in) |
| 1910 | 33.3 mm (1.3 in) |
| 1911 | 51.9 mm (2.0 in) |
| 1912 | 73.9 mm (2.9 in) |
| 1913 | 71.4 mm (2.8 in) |
| 1914 | 139.6 mm (5.5 in) |
| 1915 | 109.1 mm (4.3 in) |
| 1916 | 85.4 mm (3.4 in) |
| 1917 | 142.5 mm (5.6 in) |
| 1918 | 102.3 mm (4.0 in) |
| 1919 | 145.5 mm (5.7 in) |
| 1920 | 65.7 mm (2.6 in) |
| 1921 | 80.0 mm (3.1 in) |
| 1922 | 65.6 mm (2.6 in) |
| 1923 | 84.2 mm (3.3 in) |
| 1924 | 69.9 mm (2.8 in) |
| 1925 | 109.0 mm (4.3 in) |
| 1926 | 132.1 mm (5.2 in) |
| 1927 | 56.1 mm (2.2 in) |
| 1928 | 78.5 mm (3.1 in) |
| 1929 | 49.8 mm (2.0 in) |
| 1930 | 84.4 mm (3.3 in) |
| 1931 | 126.0 mm (5.0 in) |
| 1932 | 110.2 mm (4.3 in) |
| 1933 | 113.0 mm (4.4 in) |
| 1934 | 94.1 mm (3.7 in) |
| 1935 | 125.2 mm (4.9 in) |
| 1936 | 92.7 mm (3.6 in) |
| 1937 | 58.2 mm (2.3 in) |
| 1938 | 100.9 mm (4.0 in) |
| 1939 | 114.4 mm (4.5 in) |
| 1940 | 155.2 mm (6.1 in) |
| 1941 | 80.4 mm (3.2 in) |
| 1942 | 75.5 mm (3.0 in) |
| 1943 | 134.1 mm (5.3 in) |
| 1944 | 100.4 mm (4.0 in) |
| 1945 | 78.3 mm (3.1 in) |
| 1946 | 127.8 mm (5.0 in) |
| 1947 | 83.6 mm (3.3 in) |
| 1948 | 100.6 mm (4.0 in) |
| 1949 | 59.6 mm (2.3 in) |
| 1950 | 106.2 mm (4.2 in) |
| 1951 | 111.8 mm (4.4 in) |
| 1952 | 92.4 mm (3.6 in) |
| 1953 | 87.4 mm (3.4 in) |
| 1954 | 222.3 mm (8.8 in) |
| 1955 | 128.0 mm (5.0 in) |
| 1956 | 54.9 mm (2.2 in) |
| 1957 | 182.9 mm (7.2 in) |
| 1958 | 119.6 mm (4.7 in) |
| 1959 | 144.8 mm (5.7 in) |
| 1960 | 69.1 mm (2.7 in) |
| 1961 | 70.6 mm (2.8 in) |
| 1962 | 69.6 mm (2.7 in) |
| 1963 | 135.9 mm (5.4 in) |
| 1964 | 110.9 mm (4.4 in) |
| 1965 | 109.3 mm (4.3 in) |
| 1966 | 65.6 mm (2.6 in) |
| 1967 | 106.6 mm (4.2 in) |
| 1968 | 89.0 mm (3.5 in) |
| 1969 | 84.3 mm (3.3 in) |
| 1970 | 102.9 mm (4.1 in) |
| 1971 | 89.4 mm (3.5 in) |
| 1972 | 75.5 mm (3.0 in) |
| 1973 | 117.4 mm (4.6 in) |
| 1974 | 124.7 mm (4.9 in) |
| 1975 | 86.4 mm (3.4 in) |
| 1976 | 76.7 mm (3.0 in) |
| 1977 | 63.5 mm (2.5 in) |
| 1978 | 142.0 mm (5.6 in) |
| 1979 | 89.0 mm (3.5 in) |
| 1980 | 78.5 mm (3.1 in) |
| 1981 | 105.5 mm (4.2 in) |
| 1982 | 69.9 mm (2.8 in) |
| 1983 | 103.7 mm (4.1 in) |
| 1984 | 73.9 mm (2.9 in) |
| 1985 | 45.7 mm (1.8 in) |
| 1986 | 171.3 mm (6.7 in) |
| 1987 | 98.3 mm (3.9 in) |
| 1988 | 92.7 mm (3.6 in) |
| 1989 | 79.7 mm (3.1 in) |
| 1990 | 153.6 mm (6.0 in) |
| 1991 | 100.3 mm (3.9 in) |
| 1992 | 142.5 mm (5.6 in) |
| 1993 | 232.6 mm (9.2 in) |
| 1994 | 62.7 mm (2.5 in) |
| 1995 | 91.5 mm (3.6 in) |
| 1996 | 99.3 mm (3.9 in) |
| 1997 | 77.4 mm (3.0 in) |
| 1998 | 121.5 mm (4.8 in) |
| 1999 | 87.6 mm (3.4 in) |
| 2000 | 59.5 mm (2.3 in) |
| 2001 | 76.5 mm (3.0 in) |
| 2002 | 86.9 mm (3.4 in) |
| 2003 | 150.6 mm (5.9 in) |
| 2004 | 111.0 mm (4.4 in) |
| 2005 | 96.8 mm (3.8 in) |
| 2006 | 127.3 mm (5.0 in) |
| 2007 | 130.6 mm (5.1 in) |
| 2008 | 169.8 mm (6.7 in) |
| 2009 | 63.5 mm (2.5 in) |
| 2010 | 102.6 mm (4.0 in) |
| 2011 | 49.3 mm (1.9 in) |
| 2012 | 50.8 mm (2.0 in) |
| 2013 | 170.2 mm (6.7 in) |
| 2014 | 121.5 mm (4.8 in) |
| 2015 | 122.7 mm (4.8 in) |
| 2016 | 21.9 mm (0.9 in) |
| 2019 | 85.6 mm (3.4 in) |
| 2020 | 75.0 mm (3.0 in) |
| 2021 | 113.5 mm (4.5 in) |
| 2022 | 73.4 mm (2.9 in) |
| 2023 | 87.3 mm (3.4 in) |
| 2024 | 95.8 mm (3.8 in) |
| 2025 | 109.7 mm (4.3 in) |
| 2026 | 56.4 mm (2.2 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1893 | 19 days |
| 1894 | 16 days |
| 1895 | 33 days |
| 1901 | 31 days |
| 1902 | 36 days |
| 1903 | 20 days |
| 1904 | 12 days |
| 1905 | 18 days |
| 1906 | 31 days |
| 1907 | 25 days |
| 1908 | 25 days |
| 1909 | 24 days |
| 1910 | 51 days |
| 1911 | 29 days |
| 1912 | 18 days |
| 1913 | 43 days |
| 1914 | 33 days |
| 1915 | 20 days |
| 1916 | 20 days |
| 1917 | 22 days |
| 1918 | 20 days |
| 1919 | 31 days |
| 1920 | 17 days |
| 1921 | 29 days |
| 1922 | 20 days |
| 1923 | 18 days |
| 1924 | 21 days |
| 1925 | 21 days |
| 1926 | 22 days |
| 1927 | 25 days |
| 1928 | 23 days |
| 1929 | 20 days |
| 1930 | 30 days |
| 1931 | 44 days |
| 1932 | 30 days |
| 1933 | 23 days |
| 1934 | 34 days |
| 1935 | 19 days |
| 1936 | 25 days |
| 1937 | 27 days |
| 1938 | 27 days |
| 1939 | 30 days |
| 1940 | 26 days |
| 1941 | 21 days |
| 1942 | 37 days |
| 1943 | 20 days |
| 1944 | 30 days |
| 1945 | 24 days |
| 1946 | 39 days |
| 1947 | 43 days |
| 1948 | 28 days |
| 1949 | 34 days |
| 1950 | 42 days |
| 1951 | 17 days |
| 1952 | 39 days |
| 1953 | 24 days |
| 1954 | 25 days |
| 1955 | 21 days |
| 1956 | 37 days |
| 1957 | 26 days |
| 1958 | 37 days |
| 1959 | 23 days |
| 1960 | 18 days |
| 1961 | 25 days |
| 1962 | 60 days |
| 1963 | 26 days |
| 1964 | 21 days |
| 1965 | 14 days |
| 1966 | 40 days |
| 1967 | 35 days |
| 1968 | 21 days |
| 1969 | 35 days |
| 1970 | 42 days |
| 1971 | 30 days |
| 1972 | 22 days |
| 1973 | 18 days |
| 1974 | 16 days |
| 1975 | 27 days |
| 1976 | 46 days |
| 1977 | 21 days |
| 1978 | 30 days |
| 1979 | 30 days |
| 1980 | 31 days |
| 1981 | 31 days |
| 1982 | 25 days |
| 1983 | 22 days |
| 1984 | 28 days |
| 1985 | 21 days |
| 1986 | 31 days |
| 1987 | 36 days |
| 1988 | 28 days |
| 1989 | 33 days |
| 1990 | 19 days |
| 1991 | 19 days |
| 1992 | 23 days |
| 1993 | 22 days |
| 1994 | 23 days |
| 1995 | 30 days |
| 1996 | 18 days |
| 1997 | 20 days |
| 1998 | 50 days |
| 1999 | 32 days |
| 2000 | 16 days |
| 2001 | 18 days |
| 2002 | 56 days |
| 2003 | 19 days |
| 2004 | 19 days |
| 2005 | 30 days |
| 2006 | 26 days |
| 2007 | 30 days |
| 2008 | 16 days |
| 2009 | 24 days |
| 2010 | 29 days |
| 2011 | 20 days |
| 2012 | 21 days |
| 2013 | 34 days |
| 2014 | 30 days |
| 2015 | 26 days |
| 2016 | 16 days |
| 2019 | 26 days |
| 2020 | 25 days |
| 2021 | 29 days |
| 2022 | 26 days |
| 2023 | 29 days |
| 2024 | 27 days |
| 2025 | 38 days |
| 2026 | 17 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
102 years with a frostAcross 102 years with a frost, the median last spring frost at Jefferson falls on 28 April and the median first autumn frost on 4 October, which leaves a median of 159 days between them.
In 1991 to 2025 the median growing season was 168 days. That is 12 days more than in 1911 to 1943.
Fitted over all years, the growing season changes by +1.2 days per decade at this station.
| Measure | Median, all years | Earliest period (1911 to 1943) | Recent period (1991 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 28 April | 29 April | 25 April | 4 days earlier | -1.0 days per decade |
| First autumn frost | 4 October | 5 October | 7 October | 2 days later | +0.2 days per decade |
| Growing days | 159 days | 156 days | 168 days | 12 days more | +1.2 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
109 years, 1902 to 2025A day with at least 63.9 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 173.5 mm (6.8 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 63.9 mm (2.5 in) | |
| 5 years | 87.6 mm (3.4 in) | |
| 10 years | 105.3 mm (4.1 in) | |
| 25 years | 130.4 mm (5.1 in) | |
| 50 years | 151.0 mm (5.9 in) | |
| 100 years | 173.5 mm (6.8 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 109 years of values from 1902 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: 198.9 mm (7.8 in) in 1993; 149.9 mm (5.9 in) in 2008; 140.0 mm (5.5 in) in 1986.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Jefferson, at 1919 and 1937. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1919 ran 0.5 C (0.9 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1937 ran 0.3 C (0.5 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1919 | -0.5 | -0.9 | likely | 5 |
| 1937 | +0.3 | +0.5 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2006 to 2025 against 1961 to 1990Over 2006 to 2025, Jefferson had a mean temperature of 9.0 C (48.3 F) and 859.0 mm (33.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Bellevue L/D 12 (United States, 329 km away), Dixon Wwtp (United States, 404 km away) and Beloit (United States, 445 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Bellevue L/D 12 | United States | 329 km (204 mi) | 9.1 C (48.3 F) | 850.5 mm (33.5 in) | 0.67 |
| Dixon Wwtp | United States | 404 km (251 mi) | 9.2 C (48.6 F) | 888.0 mm (35.0 in) | 0.69 |
| Beloit | United States | 445 km (277 mi) | 9.1 C (48.5 F) | 852.3 mm (33.6 in) | 0.71 |
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 (2026-10-12).