Decorah Weather Records (USC00132110)
Record envelope, standing records and threshold days for Decorah (USC00132110), Iowa, United States, with 134 years of record.
Key Facts for Decorah
- Decorah (USC00132110) is a weather station in Iowa, United States at 43.30 latitude and -91.80 longitude, 262 m (860 ft) above sea level.
- The station reports from 1893 to 2026, 134 years of record.
- 1,464 records set at Decorah still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Decorah set a daily record high maximum temperature of 31.1 C (88.0 F) on 13 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Iowa, United States, 43.30 latitude, -91.80 longitude.
- Elevation: 262 m (860 ft).
- Period of record: 1893 to 2026, 134 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
12 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 16.7 C (62.1 F) | -41.7 C (-43.1 F) | 9.4 C (48.9 F) | -29.4 C (-20.9 F) |
| Feb | 23.3 C (73.9 F) | -40.6 C (-41.1 F) | 17.2 C (63.0 F) | -17.2 C (1.0 F) |
| Mar | 29.4 C (84.9 F) | -36.1 C (-33.0 F) | 28.3 C (82.9 F) | -16.7 C (1.9 F) |
| Apr | 33.9 C (93.0 F) | -15.0 C (5.0 F) | 28.3 C (82.9 F) | -5.6 C (21.9 F) |
| May | 38.9 C (102.0 F) | -6.7 C (19.9 F) | 32.2 C (90.0 F) | -2.2 C (28.0 F) |
| Jun | 40.6 C (105.1 F) | -1.7 C (28.9 F) | 33.9 C (93.0 F) | 7.8 C (46.0 F) |
| Jul | 43.9 C (111.0 F) | 3.3 C (37.9 F) | 35.6 C (96.1 F) | 12.2 C (54.0 F) |
| Aug | 40.6 C (105.1 F) | 0.0 C (32.0 F) | 31.1 C (88.0 F) | 10.0 C (50.0 F) |
| Sep | 37.8 C (100.0 F) | -7.8 C (18.0 F) | 32.8 C (91.0 F) | 6.1 C (43.0 F) |
| Oct | 34.4 C (93.9 F) | -21.7 C (-7.1 F) | 31.7 C (89.1 F) | 3.9 C (39.0 F) |
| Nov | 26.1 C (79.0 F) | -26.7 C (-16.1 F) | n/a | n/a |
| Dec | 20.6 C (69.1 F) | -37.8 C (-36.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1893 | 9 |
| 1894 | 16 |
| 1895 | 22 |
| 1896 | 23 |
| 1897 | 23 |
| 1898 | 6 |
| 1899 | 25 |
| 1900 | 11 |
| 1901 | 16 |
| 1902 | 15 |
| 1903 | 11 |
| 1904 | 5 |
| 1905 | 12 |
| 1906 | 3 |
| 1907 | 9 |
| 1908 | 6 |
| 1909 | 12 |
| 1910 | 17 |
| 1911 | 26 |
| 1912 | 25 |
| 1913 | 16 |
| 1914 | 9 |
| 1915 | 11 |
| 1916 | 18 |
| 1917 | 18 |
| 1918 | 8 |
| 1919 | 6 |
| 1920 | 8 |
| 1921 | 3 |
| 1922 | 5 |
| 1923 | 12 |
| 1924 | 21 |
| 1925 | 23 |
| 1926 | 17 |
| 1927 | 13 |
| 1928 | 11 |
| 1929 | 14 |
| 1930 | 25 |
| 1931 | 18 |
| 1932 | 14 |
| 1933 | 11 |
| 1934 | 23 |
| 1935 | 12 |
| 1936 | 28 |
| 1937 | 14 |
| 1938 | 9 |
| 1939 | 17 |
| 1940 | 5 |
| 1948 | 12 |
| 1949 | 14 |
| 1950 | 15 |
| 1951 | 14 |
| 1952 | 10 |
| 1953 | 9 |
| 1954 | 6 |
| 1955 | 13 |
| 1956 | 10 |
| 1957 | 6 |
| 1958 | 11 |
| 1959 | 13 |
| 1960 | 5 |
| 1961 | 5 |
| 1962 | 15 |
| 1963 | 13 |
| 1964 | 13 |
| 1965 | 17 |
| 1966 | 7 |
| 1967 | 11 |
| 1968 | 11 |
| 1969 | 7 |
| 1970 | 9 |
| 1971 | 7 |
| 1972 | 13 |
| 1973 | 14 |
| 1974 | 9 |
| 1975 | 8 |
| 1976 | 5 |
| 1977 | 7 |
| 1978 | 1 |
| 1979 | 4 |
| 1980 | 5 |
| 1981 | 9 |
| 1982 | 10 |
| 1983 | 18 |
| 1984 | 9 |
| 1985 | 11 |
| 1986 | 7 |
| 1987 | 7 |
| 1988 | 9 |
| 1989 | 10 |
| 1990 | 14 |
| 1991 | 13 |
| 1992 | 11 |
| 1993 | 4 |
| 1994 | 8 |
| 1995 | 6 |
| 1996 | 9 |
| 1997 | 6 |
| 1998 | 13 |
| 1999 | 9 |
| 2000 | 16 |
| 2001 | 12 |
| 2002 | 14 |
| 2003 | 7 |
| 2004 | 4 |
| 2005 | 9 |
| 2006 | 12 |
| 2007 | 9 |
| 2008 | 4 |
| 2009 | 5 |
| 2010 | 5 |
| 2011 | 9 |
| 2012 | 21 |
| 2013 | 5 |
| 2014 | 7 |
| 2015 | 8 |
| 2016 | 5 |
| 2017 | 16 |
| 2018 | 11 |
| 2019 | 6 |
| 2020 | 11 |
| 2021 | 9 |
| 2022 | 6 |
| 2023 | 20 |
| 2024 | 26 |
| 2025 | 15 |
| 2026 | 9 |
All-Time Record Progression
14 new records| Date | Kind | Detail |
|---|---|---|
| 1928-08-23 | Record daily precipitation | Record daily precipitation 113.3 mm (4.5 in) |
| 1930-08-03 | Record high minimum temperature | Record high minimum temperature 28.9 C (84.0 F) |
| 1933-07-02 | Record daily precipitation | Record daily precipitation 114.3 mm (4.5 in) |
| 1936-07-13 | Record high maximum temperature | Record high maximum temperature 42.8 C (109.0 F) |
| 1936-07-14 | Record high maximum temperature | Record high maximum temperature 43.9 C (111.0 F) |
| 1951-01-30 | Record low minimum temperature | Record low minimum temperature -41.7 C (-43.1 F) |
| 1951-06-26 | Record daily precipitation | Record daily precipitation 119.9 mm (4.7 in) |
| 1959-03-06 | Record daily snowfall | Record daily snowfall 33.0 cm (13.0 in) |
| 1964-06-23 | Record daily precipitation | Record daily precipitation 126.7 mm (5.0 in) |
| 1970-07-29 | Record daily precipitation | Record daily precipitation 154.4 mm (6.1 in) |
| 1985-12-01 | Record daily snowfall | Record daily snowfall 36.8 cm (14.5 in) |
| 2008-06-08 | Record daily precipitation | Record daily precipitation 167.6 mm (6.6 in) |
| 2016-08-24 | Record daily precipitation | Record daily precipitation 204.7 mm (8.1 in) |
| 2025-08-18 | Record daily precipitation | Record daily precipitation 219.5 mm (8.6 in) |
Wettest Day of Each Month
Aug: 219.5 mm (8.6 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 31.8 mm (1.3 in) | 25 January 1967 |
| Feb | 49.3 mm (1.9 in) | 22 February 1922 |
| Mar | 58.4 mm (2.3 in) | 14 March 1913 |
| Apr | 95.0 mm (3.7 in) | 23 April 1968 |
| May | 95.3 mm (3.8 in) | 4 May 2018 |
| Jun | 167.6 mm (6.6 in) | 8 June 2008 |
| Jul | 154.4 mm (6.1 in) | 29 July 1970 |
| Aug | 219.5 mm (8.6 in) | 18 August 2025 |
| Sep | 121.7 mm (4.8 in) | 21 September 1986 |
| Oct | 78.2 mm (3.1 in) | 10 October 1904 |
| Nov | 66.5 mm (2.6 in) | 10 November 1975 |
| Dec | 38.6 mm (1.5 in) | 14 December 2015 |
Period of Record Coverage
1893 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1893 | 164 | 45% | No |
| 1894 | 324 | 89% | No |
| 1895 | 361 | 99% | Yes |
| 1896 | 356 | 97% | Yes |
| 1897 | 356 | 98% | Yes |
| 1898 | 365 | 100% | Yes |
| 1899 | 362 | 99% | Yes |
| 1900 | 353 | 97% | Yes |
| 1901 | 354 | 97% | Yes |
| 1902 | 363 | 99% | Yes |
| 1903 | 365 | 100% | Yes |
| 1904 | 357 | 98% | Yes |
| 1905 | 360 | 99% | Yes |
| 1906 | 364 | 100% | Yes |
| 1907 | 360 | 99% | Yes |
| 1908 | 362 | 99% | Yes |
| 1909 | 317 | 87% | No |
| 1910 | 356 | 98% | Yes |
| 1911 | 357 | 98% | Yes |
| 1912 | 362 | 99% | Yes |
| 1913 | 295 | 81% | No |
| 1914 | 357 | 98% | Yes |
| 1915 | 362 | 99% | Yes |
| 1916 | 363 | 99% | Yes |
| 1917 | 362 | 99% | Yes |
| 1918 | 361 | 99% | Yes |
| 1919 | 365 | 100% | Yes |
| 1920 | 351 | 96% | Yes |
| 1921 | 317 | 87% | No |
| 1922 | 364 | 100% | Yes |
| 1923 | 364 | 100% | Yes |
| 1924 | 359 | 98% | Yes |
| 1925 | 362 | 99% | Yes |
| 1926 | 363 | 99% | Yes |
| 1927 | 361 | 99% | Yes |
| 1928 | 364 | 99% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 348 | 95% | Yes |
| 1931 | 364 | 100% | Yes |
| 1932 | 362 | 99% | Yes |
| 1933 | 364 | 100% | Yes |
| 1934 | 362 | 99% | Yes |
| 1935 | 362 | 99% | Yes |
| 1936 | 364 | 99% | Yes |
| 1937 | 363 | 99% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 152 | 42% | No |
| 1948 | 273 | 75% | No |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 364 | 99% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 363 | 99% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 363 | 99% | Yes |
| 1981 | 335 | 92% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 364 | 99% | Yes |
| 1985 | 360 | 99% | Yes |
| 1986 | 335 | 92% | Yes |
| 1987 | 362 | 99% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 363 | 99% | Yes |
| 1992 | 359 | 98% | Yes |
| 1993 | 360 | 99% | Yes |
| 1994 | 357 | 98% | Yes |
| 1995 | 360 | 99% | Yes |
| 1996 | 362 | 99% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 348 | 95% | Yes |
| 1999 | 360 | 99% | Yes |
| 2000 | 359 | 98% | Yes |
| 2001 | 360 | 99% | Yes |
| 2002 | 359 | 98% | Yes |
| 2003 | 353 | 97% | Yes |
| 2004 | 361 | 99% | Yes |
| 2005 | 361 | 99% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 363 | 99% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 364 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 365 | 100% | Yes |
| 2017 | 363 | 99% | Yes |
| 2018 | 364 | 100% | Yes |
| 2019 | 363 | 99% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 364 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 285 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 13 October 2026 | Decorah, US | daily high max (Provisional) | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 51 years | 26 of 100 (Routine) |
| 12 October 2026 | Decorah, US | daily high max (Provisional) | 31.7 C (89.1 F) | 2.3 C (4.1 F) | 69 years | 33 of 100 (Routine) |
| 12 October 2026 | Decorah, US | daily high min (Provisional) | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 28 years | 19 of 100 (Routine) |
| 11 October 2026 | Decorah, US | daily high max (Provisional) | 30.6 C (87.1 F) | 1.7 C (3.1 F) | 97 years | 41 of 100 (Notable) |
| 10 October 2026 | Decorah, US | daily high max (Tie, Provisional) | 31.1 C (88.0 F) | tie | 121 years | 10 of 100 (Routine) |
| 19 September 2026 | Decorah, US | monthly rain (Provisional) | 122.2 mm (4.8 in) | 0.5 mm (0.02 in) | 39 years | 31 of 100 (Routine) |
| 30 June 2026 | Decorah, US | monthly high min (Tie) | 25.6 C (78.1 F) | tie | 73 years | 10 of 100 (Routine) |
| 29 June 2026 | Decorah, US | monthly high min (Tie) | 25.6 C (78.1 F) | tie | 73 years | 10 of 100 (Routine) |
| 10 June 2026 | Decorah, US | daily high min | 23.3 C (73.9 F) | 1.1 C (2.0 F) | 115 years | 42 of 100 (Notable) |
| 13 April 2026 | Decorah, US | daily high min | 15.6 C (60.1 F) | 1.2 C (2.2 F) | 3 years | 12 of 100 (Routine) |
| 4 April 2026 | Decorah, US | daily rain | 54.9 mm (2.2 in) | 5.4 mm (0.21 in) | 44 years | 28 of 100 (Routine) |
| 2 April 2026 | Decorah, US | daily rain | 42.7 mm (1.7 in) | 14.8 mm (0.6 in) | 105 years | 55 of 100 (Notable) |
| 31 March 2026 | Decorah, US | daily high max | 26.7 C (80.1 F) | 0.6 C (1.1 F) | 40 years | 22 of 100 (Routine) |
| 22 March 2026 | Decorah, US | daily high max | 28.3 C (82.9 F) | 4.4 C (7.9 F) | 13 years | 20 of 100 (Routine) |
| 21 March 2026 | Decorah, US | daily high max | 28.3 C (82.9 F) | 1.6 C (2.9 F) | 88 years | 38 of 100 (Notable) |
| 10 March 2026 | Decorah, US | daily high max (Tie) | 21.1 C (70.0 F) | tie | 0 years | 2 of 100 (Routine) |
| 9 March 2026 | Decorah, US | daily high min | 3.9 C (39.0 F) | 0.6 C (1.1 F) | 48 years | 24 of 100 (Routine) |
| 18 February 2026 | Decorah, US | daily high min (Tie) | 6.1 C (43.0 F) | tie | 44 years | 5 of 100 (Routine) |
| 17 February 2026 | Decorah, US | daily high max (Tie) | 16.7 C (62.1 F) | tie | 44 years | 5 of 100 (Routine) |
| 16 February 2026 | Decorah, US | daily high max | 17.2 C (63.0 F) | 2.2 C (4.0 F) | 44 years | 26 of 100 (Routine) |
Climate Trend
115 complete years, 1895 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1895 | 7.0 C | -1.11 C |
| 1896 | 7.7 C | -0.37 C |
| 1897 | 7.1 C | -0.95 C |
| 1898 | 7.5 C | -0.61 C |
| 1899 | 7.1 C | -1.00 C |
| 1900 | 8.1 C | +0.04 C |
| 1901 | 7.8 C | -0.26 C |
| 1902 | 7.8 C | -0.33 C |
| 1903 | 7.2 C | -0.88 C |
| 1904 | 6.6 C | -1.44 C |
| 1905 | 7.3 C | -0.79 C |
| 1906 | 8.3 C | +0.25 C |
| 1907 | 7.4 C | -0.66 C |
| 1908 | 8.6 C | +0.54 C |
| 1910 | 8.3 C | +0.23 C |
| 1911 | 8.6 C | +0.55 C |
| 1912 | 6.6 C | -1.50 C |
| 1914 | 8.7 C | +0.58 C |
| 1915 | 7.1 C | -0.95 C |
| 1916 | 6.8 C | -1.28 C |
| 1917 | 4.9 C | -3.15 C |
| 1918 | 7.6 C | -0.45 C |
| 1919 | 8.3 C | +0.24 C |
| 1922 | 8.6 C | +0.55 C |
| 1923 | 7.8 C | -0.30 C |
| 1924 | 5.7 C | -2.40 C |
| 1925 | 7.0 C | -1.07 C |
| 1927 | 7.8 C | -0.26 C |
| 1928 | 8.1 C | +0.05 C |
| 1929 | 6.3 C | -1.82 C |
| 1931 | 10.2 C | +2.15 C |
| 1932 | 7.5 C | -0.61 C |
| 1933 | 8.7 C | +0.66 C |
| 1934 | 9.1 C | +1.02 C |
| 1935 | 8.0 C | -0.08 C |
| 1936 | 7.9 C | -0.19 C |
| 1937 | 7.6 C | -0.53 C |
| 1938 | 9.5 C | +1.45 C |
| 1939 | 9.4 C | +1.28 C |
| 1949 | 8.9 C | +0.83 C |
| 1950 | 6.7 C | -1.43 C |
| 1951 | 6.1 C | -1.98 C |
| 1952 | 8.2 C | +0.08 C |
| 1953 | 8.7 C | +0.62 C |
| 1954 | 8.7 C | +0.65 C |
| 1955 | 8.1 C | +0.03 C |
| 1956 | 7.8 C | -0.31 C |
| 1957 | 8.0 C | -0.08 C |
| 1958 | 7.6 C | -0.49 C |
| 1959 | 7.5 C | -0.58 C |
| 1960 | 7.8 C | -0.32 C |
| 1961 | 7.9 C | -0.23 C |
| 1962 | 7.5 C | -0.62 C |
| 1963 | 7.9 C | -0.17 C |
| 1964 | 8.9 C | +0.84 C |
| 1965 | 7.6 C | -0.52 C |
| 1966 | 7.6 C | -0.46 C |
| 1967 | 7.6 C | -0.49 C |
| 1968 | 8.5 C | +0.41 C |
| 1969 | 7.3 C | -0.77 C |
| 1970 | 7.7 C | -0.42 C |
| 1971 | 7.5 C | -0.58 C |
| 1972 | 6.3 C | -1.82 C |
| 1973 | 8.4 C | +0.30 C |
| 1974 | 7.4 C | -0.68 C |
| 1975 | 7.4 C | -0.65 C |
| 1976 | 7.1 C | -0.97 C |
| 1977 | 7.9 C | -0.22 C |
| 1978 | 6.7 C | -1.40 C |
| 1979 | 6.3 C | -1.76 C |
| 1980 | 7.7 C | -0.34 C |
| 1982 | 7.0 C | -1.11 C |
| 1983 | 8.3 C | +0.20 C |
| 1984 | 8.4 C | +0.29 C |
| 1985 | 7.1 C | -1.01 C |
| 1986 | 8.5 C | +0.39 C |
| 1987 | 10.2 C | +2.16 C |
| 1988 | 8.4 C | +0.31 C |
| 1989 | 7.6 C | -0.44 C |
| 1990 | 9.4 C | +1.35 C |
| 1991 | 8.5 C | +0.38 C |
| 1992 | 7.9 C | -0.17 C |
| 1993 | 7.0 C | -1.08 C |
| 1994 | 7.9 C | -0.15 C |
| 1995 | 8.1 C | +0.04 C |
| 1996 | 6.7 C | -1.39 C |
| 1997 | 7.8 C | -0.24 C |
| 1998 | 10.4 C | +2.35 C |
| 1999 | 9.3 C | +1.25 C |
| 2000 | 8.5 C | +0.41 C |
| 2001 | 9.1 C | +0.97 C |
| 2002 | 9.4 C | +1.27 C |
| 2003 | 8.3 C | +0.23 C |
| 2004 | 8.8 C | +0.75 C |
| 2005 | 9.0 C | +0.96 C |
| 2006 | 9.7 C | +1.63 C |
| 2007 | 8.7 C | +0.57 C |
| 2008 | 7.1 C | -0.95 C |
| 2009 | 7.5 C | -0.62 C |
| 2010 | 8.7 C | +0.66 C |
| 2011 | 8.7 C | +0.64 C |
| 2012 | 10.8 C | +2.74 C |
| 2013 | 7.7 C | -0.43 C |
| 2014 | 6.6 C | -1.48 C |
| 2015 | 9.2 C | +1.12 C |
| 2016 | 9.8 C | +1.69 C |
| 2017 | 9.4 C | +1.30 C |
| 2018 | 8.3 C | +0.26 C |
| 2019 | 8.2 C | +0.10 C |
| 2020 | 9.9 C | +1.83 C |
| 2021 | 10.2 C | +2.13 C |
| 2022 | 8.5 C | +0.45 C |
| 2023 | 10.9 C | +2.83 C |
| 2024 | 11.4 C | +3.29 C |
| 2025 | 9.8 C | +1.68 C |
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1895 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 115 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.1 C (0.1 to 0.2) per decade | 0.2 F (0.1 to 0.3) per decade | 1895 to 2025 | 115 | Rise |
| Mean daily maximum | 0.10 C (0.04 to 0.16) per decade | 0.2 F (0.1 to 0.3) per decade | 1895 to 2025 | 115 | Rise |
| Mean daily minimum | 0.1 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.3) per decade | 1895 to 2025 | 115 | Rise |
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) | 1936 | 35.6 C (96.1 F) | 127 |
| Coldest night (TNn) | -41.7 C (-43.1 F) | 1951 | -30.6 C (-23.1 F) | 127 |
| Wettest day (Rx1day) | 219.5 mm (8.6 in) | 2025 | 60.7 mm (2.4 in) | 127 |
| Wettest five days (Rx5day) | 318.6 mm (12.5 in) | 2025 | 94.2 mm (3.7 in) | 127 |
| Longest dry spell (CDD) | 58 days | 1952 | 23 days | 127 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1893 | 33.9 C (93.0 F) |
| 1894 | 40.0 C (104.0 F) |
| 1895 | 36.1 C (97.0 F) |
| 1896 | 36.7 C (98.1 F) |
| 1897 | 36.1 C (97.0 F) |
| 1898 | 35.0 C (95.0 F) |
| 1899 | 37.2 C (99.0 F) |
| 1900 | 37.2 C (99.0 F) |
| 1901 | 41.7 C (107.1 F) |
| 1902 | 32.8 C (91.0 F) |
| 1903 | 32.2 C (90.0 F) |
| 1904 | 33.3 C (91.9 F) |
| 1905 | 36.7 C (98.1 F) |
| 1906 | 35.0 C (95.0 F) |
| 1907 | 33.3 C (91.9 F) |
| 1908 | 36.7 C (98.1 F) |
| 1909 | 37.8 C (100.0 F) |
| 1910 | 40.6 C (105.1 F) |
| 1911 | 42.2 C (108.0 F) |
| 1912 | 38.9 C (102.0 F) |
| 1913 | 38.3 C (100.9 F) |
| 1914 | 37.2 C (99.0 F) |
| 1915 | 32.2 C (90.0 F) |
| 1916 | 37.2 C (99.0 F) |
| 1917 | 37.8 C (100.0 F) |
| 1918 | 36.1 C (97.0 F) |
| 1919 | 36.7 C (98.1 F) |
| 1920 | 34.4 C (93.9 F) |
| 1921 | 38.3 C (100.9 F) |
| 1922 | 37.2 C (99.0 F) |
| 1923 | 37.2 C (99.0 F) |
| 1924 | 32.2 C (90.0 F) |
| 1925 | 36.7 C (98.1 F) |
| 1926 | 38.9 C (102.0 F) |
| 1927 | 35.6 C (96.1 F) |
| 1928 | 35.0 C (95.0 F) |
| 1929 | 36.7 C (98.1 F) |
| 1930 | 38.3 C (100.9 F) |
| 1931 | 38.9 C (102.0 F) |
| 1932 | 36.1 C (97.0 F) |
| 1933 | 38.3 C (100.9 F) |
| 1934 | 40.6 C (105.1 F) |
| 1935 | 36.7 C (98.1 F) |
| 1936 | 43.9 C (111.0 F) |
| 1937 | 40.0 C (104.0 F) |
| 1938 | 34.4 C (93.9 F) |
| 1939 | 38.9 C (102.0 F) |
| 1940 | 34.4 C (93.9 F) |
| 1948 | 38.9 C (102.0 F) |
| 1949 | 37.8 C (100.0 F) |
| 1950 | 32.8 C (91.0 F) |
| 1951 | 32.2 C (90.0 F) |
| 1952 | 35.0 C (95.0 F) |
| 1953 | 35.6 C (96.1 F) |
| 1954 | 35.6 C (96.1 F) |
| 1955 | 40.0 C (104.0 F) |
| 1956 | 35.0 C (95.0 F) |
| 1957 | 35.0 C (95.0 F) |
| 1958 | 35.0 C (95.0 F) |
| 1959 | 33.3 C (91.9 F) |
| 1960 | 34.4 C (93.9 F) |
| 1961 | 33.9 C (93.0 F) |
| 1962 | 32.2 C (90.0 F) |
| 1963 | 37.8 C (100.0 F) |
| 1964 | 38.3 C (100.9 F) |
| 1965 | 37.2 C (99.0 F) |
| 1966 | 36.1 C (97.0 F) |
| 1967 | 33.9 C (93.0 F) |
| 1968 | 35.0 C (95.0 F) |
| 1969 | 33.9 C (93.0 F) |
| 1970 | 36.7 C (98.1 F) |
| 1971 | 33.9 C (93.0 F) |
| 1972 | 33.9 C (93.0 F) |
| 1973 | 33.9 C (93.0 F) |
| 1974 | 34.4 C (93.9 F) |
| 1975 | 34.4 C (93.9 F) |
| 1976 | 35.0 C (95.0 F) |
| 1977 | 35.0 C (95.0 F) |
| 1978 | 36.7 C (98.1 F) |
| 1979 | 31.7 C (89.1 F) |
| 1980 | 37.2 C (99.0 F) |
| 1981 | 33.9 C (93.0 F) |
| 1982 | 34.4 C (93.9 F) |
| 1983 | 36.1 C (97.0 F) |
| 1984 | 35.6 C (96.1 F) |
| 1985 | 36.7 C (98.1 F) |
| 1986 | 35.0 C (95.0 F) |
| 1987 | 37.2 C (99.0 F) |
| 1988 | 38.3 C (100.9 F) |
| 1989 | 36.7 C (98.1 F) |
| 1990 | 36.7 C (98.1 F) |
| 1991 | 35.0 C (95.0 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 31.7 C (89.1 F) |
| 1994 | 33.9 C (93.0 F) |
| 1995 | 38.9 C (102.0 F) |
| 1996 | 35.0 C (95.0 F) |
| 1997 | 33.3 C (91.9 F) |
| 1998 | 34.4 C (93.9 F) |
| 1999 | 35.0 C (95.0 F) |
| 2000 | 33.3 C (91.9 F) |
| 2001 | 36.1 C (97.0 F) |
| 2002 | 35.6 C (96.1 F) |
| 2003 | 36.1 C (97.0 F) |
| 2004 | 32.2 C (90.0 F) |
| 2005 | 34.4 C (93.9 F) |
| 2006 | 35.6 C (96.1 F) |
| 2007 | 33.9 C (93.0 F) |
| 2008 | 31.1 C (88.0 F) |
| 2009 | 34.4 C (93.9 F) |
| 2010 | 33.3 C (91.9 F) |
| 2011 | 35.6 C (96.1 F) |
| 2012 | 38.3 C (100.9 F) |
| 2013 | 34.4 C (93.9 F) |
| 2014 | 32.8 C (91.0 F) |
| 2015 | 33.9 C (93.0 F) |
| 2016 | 33.9 C (93.0 F) |
| 2017 | 34.4 C (93.9 F) |
| 2018 | 34.4 C (93.9 F) |
| 2019 | 34.4 C (93.9 F) |
| 2020 | 35.6 C (96.1 F) |
| 2021 | 35.6 C (96.1 F) |
| 2022 | 36.1 C (97.0 F) |
| 2023 | 40.6 C (105.1 F) |
| 2024 | 36.7 C (98.1 F) |
| 2025 | 34.4 C (93.9 F) |
| 2026 | 35.6 C (96.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1893 | -25.0 C (-13.0 F) |
| 1894 | -31.1 C (-24.0 F) |
| 1895 | -34.4 C (-29.9 F) |
| 1896 | -27.8 C (-18.0 F) |
| 1897 | -33.3 C (-27.9 F) |
| 1898 | -28.9 C (-20.0 F) |
| 1899 | -36.7 C (-34.1 F) |
| 1900 | -27.2 C (-17.0 F) |
| 1901 | -31.1 C (-24.0 F) |
| 1902 | -34.4 C (-29.9 F) |
| 1903 | -30.0 C (-22.0 F) |
| 1904 | -35.0 C (-31.0 F) |
| 1905 | -32.2 C (-26.0 F) |
| 1906 | -30.6 C (-23.1 F) |
| 1907 | -30.6 C (-23.1 F) |
| 1908 | -26.7 C (-16.1 F) |
| 1909 | -30.6 C (-23.1 F) |
| 1910 | -33.3 C (-27.9 F) |
| 1911 | -31.1 C (-24.0 F) |
| 1912 | -38.3 C (-36.9 F) |
| 1913 | -28.3 C (-18.9 F) |
| 1914 | -33.9 C (-29.0 F) |
| 1915 | -35.0 C (-31.0 F) |
| 1916 | -32.2 C (-26.0 F) |
| 1917 | -31.7 C (-25.1 F) |
| 1918 | -35.0 C (-31.0 F) |
| 1919 | -35.0 C (-31.0 F) |
| 1920 | -31.1 C (-24.0 F) |
| 1921 | -27.2 C (-17.0 F) |
| 1922 | -33.3 C (-27.9 F) |
| 1923 | -30.0 C (-22.0 F) |
| 1924 | -33.9 C (-29.0 F) |
| 1925 | -31.1 C (-24.0 F) |
| 1926 | -28.3 C (-18.9 F) |
| 1927 | -27.8 C (-18.0 F) |
| 1928 | -26.7 C (-16.1 F) |
| 1929 | -37.2 C (-35.0 F) |
| 1930 | -38.3 C (-36.9 F) |
| 1931 | -26.1 C (-15.0 F) |
| 1932 | -32.8 C (-27.0 F) |
| 1933 | -33.3 C (-27.9 F) |
| 1934 | -27.2 C (-17.0 F) |
| 1935 | -33.9 C (-29.0 F) |
| 1936 | -35.6 C (-32.1 F) |
| 1937 | -34.4 C (-29.9 F) |
| 1938 | -25.6 C (-14.1 F) |
| 1939 | -26.1 C (-15.0 F) |
| 1940 | -32.8 C (-27.0 F) |
| 1948 | -26.1 C (-15.0 F) |
| 1949 | -33.3 C (-27.9 F) |
| 1950 | -37.8 C (-36.0 F) |
| 1951 | -41.7 C (-43.1 F) |
| 1952 | -29.4 C (-20.9 F) |
| 1953 | -27.2 C (-17.0 F) |
| 1954 | -28.9 C (-20.0 F) |
| 1955 | -30.6 C (-23.1 F) |
| 1956 | -32.8 C (-27.0 F) |
| 1957 | -28.3 C (-18.9 F) |
| 1958 | -28.9 C (-20.0 F) |
| 1959 | -33.9 C (-29.0 F) |
| 1960 | -30.0 C (-22.0 F) |
| 1961 | -31.1 C (-24.0 F) |
| 1962 | -36.1 C (-33.0 F) |
| 1963 | -39.4 C (-38.9 F) |
| 1964 | -26.1 C (-15.0 F) |
| 1965 | -36.7 C (-34.1 F) |
| 1966 | -32.2 C (-26.0 F) |
| 1967 | -37.2 C (-35.0 F) |
| 1968 | -28.9 C (-20.0 F) |
| 1969 | -27.8 C (-18.0 F) |
| 1970 | -35.6 C (-32.1 F) |
| 1971 | -36.1 C (-33.0 F) |
| 1972 | -33.3 C (-27.9 F) |
| 1973 | -27.8 C (-18.0 F) |
| 1974 | -31.7 C (-25.1 F) |
| 1975 | -30.6 C (-23.1 F) |
| 1976 | -31.1 C (-24.0 F) |
| 1977 | -32.2 C (-26.0 F) |
| 1978 | -28.3 C (-18.9 F) |
| 1979 | -32.2 C (-26.0 F) |
| 1980 | -24.4 C (-11.9 F) |
| 1981 | -28.3 C (-18.9 F) |
| 1982 | -33.9 C (-29.0 F) |
| 1983 | -32.8 C (-27.0 F) |
| 1984 | -30.6 C (-23.1 F) |
| 1985 | -32.8 C (-27.0 F) |
| 1986 | -27.2 C (-17.0 F) |
| 1987 | -25.6 C (-14.1 F) |
| 1988 | -36.1 C (-33.0 F) |
| 1989 | -30.6 C (-23.1 F) |
| 1990 | -33.3 C (-27.9 F) |
| 1991 | -30.6 C (-23.1 F) |
| 1992 | -25.6 C (-14.1 F) |
| 1993 | -30.0 C (-22.0 F) |
| 1994 | -37.8 C (-36.0 F) |
| 1995 | -24.4 C (-11.9 F) |
| 1996 | -40.6 C (-41.1 F) |
| 1997 | -28.9 C (-20.0 F) |
| 1998 | -23.9 C (-11.0 F) |
| 1999 | -32.2 C (-26.0 F) |
| 2000 | -35.6 C (-32.1 F) |
| 2001 | -25.6 C (-14.1 F) |
| 2002 | -23.9 C (-11.0 F) |
| 2003 | -26.7 C (-16.1 F) |
| 2004 | -29.4 C (-20.9 F) |
| 2005 | -27.8 C (-18.0 F) |
| 2006 | -31.1 C (-24.0 F) |
| 2007 | -32.2 C (-26.0 F) |
| 2008 | -32.8 C (-27.0 F) |
| 2009 | -36.7 C (-34.1 F) |
| 2010 | -31.1 C (-24.0 F) |
| 2011 | -30.6 C (-23.1 F) |
| 2012 | -27.8 C (-18.0 F) |
| 2013 | -27.2 C (-17.0 F) |
| 2014 | -32.2 C (-26.0 F) |
| 2015 | -30.6 C (-23.1 F) |
| 2016 | -29.4 C (-20.9 F) |
| 2017 | -25.0 C (-13.0 F) |
| 2018 | -27.8 C (-18.0 F) |
| 2019 | -38.3 C (-36.9 F) |
| 2020 | -28.3 C (-18.9 F) |
| 2021 | -27.8 C (-18.0 F) |
| 2022 | -30.0 C (-22.0 F) |
| 2023 | -26.7 C (-16.1 F) |
| 2024 | -23.3 C (-9.9 F) |
| 2025 | -28.9 C (-20.0 F) |
| 2026 | -29.4 C (-20.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1893 | 33.0 mm (1.3 in) |
| 1894 | 42.4 mm (1.7 in) |
| 1895 | 45.5 mm (1.8 in) |
| 1896 | 51.3 mm (2.0 in) |
| 1897 | 56.9 mm (2.2 in) |
| 1898 | 35.1 mm (1.4 in) |
| 1899 | 53.3 mm (2.1 in) |
| 1900 | 61.5 mm (2.4 in) |
| 1901 | 50.3 mm (2.0 in) |
| 1902 | 85.1 mm (3.4 in) |
| 1903 | 78.5 mm (3.1 in) |
| 1904 | 78.2 mm (3.1 in) |
| 1905 | 47.2 mm (1.9 in) |
| 1906 | 60.7 mm (2.4 in) |
| 1907 | 82.6 mm (3.3 in) |
| 1908 | 46.7 mm (1.8 in) |
| 1909 | 60.5 mm (2.4 in) |
| 1910 | 53.3 mm (2.1 in) |
| 1911 | 82.8 mm (3.3 in) |
| 1912 | 71.1 mm (2.8 in) |
| 1913 | 58.4 mm (2.3 in) |
| 1914 | 83.3 mm (3.3 in) |
| 1915 | 63.5 mm (2.5 in) |
| 1916 | 88.9 mm (3.5 in) |
| 1917 | 62.5 mm (2.5 in) |
| 1918 | 61.7 mm (2.4 in) |
| 1919 | 94.2 mm (3.7 in) |
| 1920 | 52.1 mm (2.1 in) |
| 1921 | 45.7 mm (1.8 in) |
| 1922 | 49.3 mm (1.9 in) |
| 1923 | 48.8 mm (1.9 in) |
| 1924 | 52.1 mm (2.1 in) |
| 1925 | 57.7 mm (2.3 in) |
| 1926 | 37.6 mm (1.5 in) |
| 1927 | 53.8 mm (2.1 in) |
| 1928 | 113.3 mm (4.5 in) |
| 1929 | 36.6 mm (1.4 in) |
| 1930 | 50.3 mm (2.0 in) |
| 1931 | 61.0 mm (2.4 in) |
| 1932 | 60.2 mm (2.4 in) |
| 1933 | 114.3 mm (4.5 in) |
| 1934 | 41.1 mm (1.6 in) |
| 1935 | 43.2 mm (1.7 in) |
| 1936 | 43.7 mm (1.7 in) |
| 1937 | 49.3 mm (1.9 in) |
| 1938 | 68.1 mm (2.7 in) |
| 1939 | 63.2 mm (2.5 in) |
| 1940 | 23.4 mm (0.9 in) |
| 1948 | 71.6 mm (2.8 in) |
| 1949 | 40.4 mm (1.6 in) |
| 1950 | 75.7 mm (3.0 in) |
| 1951 | 119.9 mm (4.7 in) |
| 1952 | 44.7 mm (1.8 in) |
| 1953 | 87.9 mm (3.5 in) |
| 1954 | 57.2 mm (2.3 in) |
| 1955 | 36.3 mm (1.4 in) |
| 1956 | 55.6 mm (2.2 in) |
| 1957 | 77.7 mm (3.1 in) |
| 1958 | 60.7 mm (2.4 in) |
| 1959 | 67.3 mm (2.6 in) |
| 1960 | 50.5 mm (2.0 in) |
| 1961 | 59.9 mm (2.4 in) |
| 1962 | 91.9 mm (3.6 in) |
| 1963 | 42.7 mm (1.7 in) |
| 1964 | 126.7 mm (5.0 in) |
| 1965 | 71.4 mm (2.8 in) |
| 1966 | 52.8 mm (2.1 in) |
| 1967 | 43.7 mm (1.7 in) |
| 1968 | 95.0 mm (3.7 in) |
| 1969 | 61.5 mm (2.4 in) |
| 1970 | 154.4 mm (6.1 in) |
| 1971 | 41.4 mm (1.6 in) |
| 1972 | 115.8 mm (4.6 in) |
| 1973 | 67.8 mm (2.7 in) |
| 1974 | 48.0 mm (1.9 in) |
| 1975 | 74.4 mm (2.9 in) |
| 1976 | 77.0 mm (3.0 in) |
| 1977 | 46.7 mm (1.8 in) |
| 1978 | 54.6 mm (2.1 in) |
| 1979 | 43.7 mm (1.7 in) |
| 1980 | 72.9 mm (2.9 in) |
| 1981 | 50.8 mm (2.0 in) |
| 1982 | 62.7 mm (2.5 in) |
| 1983 | 84.8 mm (3.3 in) |
| 1984 | 45.2 mm (1.8 in) |
| 1985 | 81.3 mm (3.2 in) |
| 1986 | 121.7 mm (4.8 in) |
| 1987 | 42.7 mm (1.7 in) |
| 1988 | 69.6 mm (2.7 in) |
| 1989 | 50.8 mm (2.0 in) |
| 1990 | 78.0 mm (3.1 in) |
| 1991 | 50.0 mm (2.0 in) |
| 1992 | 61.7 mm (2.4 in) |
| 1993 | 87.1 mm (3.4 in) |
| 1994 | 52.6 mm (2.1 in) |
| 1995 | 69.9 mm (2.8 in) |
| 1996 | 49.8 mm (2.0 in) |
| 1997 | 37.1 mm (1.5 in) |
| 1998 | 83.1 mm (3.3 in) |
| 1999 | 49.5 mm (1.9 in) |
| 2000 | 118.4 mm (4.7 in) |
| 2001 | 70.6 mm (2.8 in) |
| 2002 | 61.2 mm (2.4 in) |
| 2003 | 31.5 mm (1.2 in) |
| 2004 | 79.5 mm (3.1 in) |
| 2005 | 55.1 mm (2.2 in) |
| 2006 | 56.1 mm (2.2 in) |
| 2007 | 81.5 mm (3.2 in) |
| 2008 | 167.6 mm (6.6 in) |
| 2009 | 44.2 mm (1.7 in) |
| 2010 | 50.0 mm (2.0 in) |
| 2011 | 43.2 mm (1.7 in) |
| 2012 | 44.7 mm (1.8 in) |
| 2013 | 65.8 mm (2.6 in) |
| 2014 | 60.2 mm (2.4 in) |
| 2015 | 92.7 mm (3.6 in) |
| 2016 | 204.7 mm (8.1 in) |
| 2017 | 50.8 mm (2.0 in) |
| 2018 | 95.3 mm (3.8 in) |
| 2019 | 82.6 mm (3.3 in) |
| 2020 | 63.2 mm (2.5 in) |
| 2021 | 71.9 mm (2.8 in) |
| 2022 | 96.3 mm (3.8 in) |
| 2023 | 87.4 mm (3.4 in) |
| 2024 | 79.2 mm (3.1 in) |
| 2025 | 219.5 mm (8.6 in) |
| 2026 | 122.2 mm (4.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1893 | 35.5 mm (1.4 in) |
| 1894 | 47.9 mm (1.9 in) |
| 1895 | 65.6 mm (2.6 in) |
| 1896 | 75.7 mm (3.0 in) |
| 1897 | 70.1 mm (2.8 in) |
| 1898 | 58.2 mm (2.3 in) |
| 1899 | 57.6 mm (2.3 in) |
| 1900 | 76.9 mm (3.0 in) |
| 1901 | 106.2 mm (4.2 in) |
| 1902 | 116.9 mm (4.6 in) |
| 1903 | 106.9 mm (4.2 in) |
| 1904 | 97.0 mm (3.8 in) |
| 1905 | 89.3 mm (3.5 in) |
| 1906 | 68.6 mm (2.7 in) |
| 1907 | 110.2 mm (4.3 in) |
| 1908 | 79.2 mm (3.1 in) |
| 1909 | 113.1 mm (4.5 in) |
| 1910 | 61.9 mm (2.4 in) |
| 1911 | 128.6 mm (5.1 in) |
| 1912 | 74.7 mm (2.9 in) |
| 1913 | 86.1 mm (3.4 in) |
| 1914 | 104.6 mm (4.1 in) |
| 1915 | 84.4 mm (3.3 in) |
| 1916 | 116.3 mm (4.6 in) |
| 1917 | 79.8 mm (3.1 in) |
| 1918 | 92.5 mm (3.6 in) |
| 1919 | 94.2 mm (3.7 in) |
| 1920 | 63.7 mm (2.5 in) |
| 1921 | 92.9 mm (3.7 in) |
| 1922 | 73.9 mm (2.9 in) |
| 1923 | 68.1 mm (2.7 in) |
| 1924 | 56.9 mm (2.2 in) |
| 1925 | 40.7 mm (1.6 in) |
| 1926 | 65.8 mm (2.6 in) |
| 1927 | 99.2 mm (3.9 in) |
| 1928 | 170.2 mm (6.7 in) |
| 1929 | 53.8 mm (2.1 in) |
| 1930 | 73.7 mm (2.9 in) |
| 1931 | 101.2 mm (4.0 in) |
| 1932 | 113.8 mm (4.5 in) |
| 1933 | 114.3 mm (4.5 in) |
| 1934 | 80.0 mm (3.1 in) |
| 1935 | 93.7 mm (3.7 in) |
| 1936 | 82.1 mm (3.2 in) |
| 1937 | 52.3 mm (2.1 in) |
| 1938 | 116.3 mm (4.6 in) |
| 1939 | 64.5 mm (2.5 in) |
| 1940 | 27.2 mm (1.1 in) |
| 1948 | 88.3 mm (3.5 in) |
| 1949 | 83.1 mm (3.3 in) |
| 1950 | 154.9 mm (6.1 in) |
| 1951 | 138.4 mm (5.4 in) |
| 1952 | 61.0 mm (2.4 in) |
| 1953 | 151.1 mm (5.9 in) |
| 1954 | 119.4 mm (4.7 in) |
| 1955 | 61.8 mm (2.4 in) |
| 1956 | 71.6 mm (2.8 in) |
| 1957 | 96.5 mm (3.8 in) |
| 1958 | 62.5 mm (2.5 in) |
| 1959 | 116.9 mm (4.6 in) |
| 1960 | 67.3 mm (2.6 in) |
| 1961 | 102.3 mm (4.0 in) |
| 1962 | 133.9 mm (5.3 in) |
| 1963 | 54.6 mm (2.1 in) |
| 1964 | 139.1 mm (5.5 in) |
| 1965 | 107.0 mm (4.2 in) |
| 1966 | 61.7 mm (2.4 in) |
| 1967 | 88.0 mm (3.5 in) |
| 1968 | 127.5 mm (5.0 in) |
| 1969 | 153.7 mm (6.1 in) |
| 1970 | 172.2 mm (6.8 in) |
| 1971 | 64.2 mm (2.5 in) |
| 1972 | 176.6 mm (7.0 in) |
| 1973 | 102.3 mm (4.0 in) |
| 1974 | 71.8 mm (2.8 in) |
| 1975 | 106.4 mm (4.2 in) |
| 1976 | 118.1 mm (4.6 in) |
| 1977 | 64.7 mm (2.5 in) |
| 1978 | 74.5 mm (2.9 in) |
| 1979 | 71.7 mm (2.8 in) |
| 1980 | 110.7 mm (4.4 in) |
| 1981 | 95.8 mm (3.8 in) |
| 1982 | 86.6 mm (3.4 in) |
| 1983 | 163.3 mm (6.4 in) |
| 1984 | 77.9 mm (3.1 in) |
| 1985 | 117.1 mm (4.6 in) |
| 1986 | 135.2 mm (5.3 in) |
| 1987 | 96.3 mm (3.8 in) |
| 1988 | 93.0 mm (3.7 in) |
| 1989 | 73.7 mm (2.9 in) |
| 1990 | 103.7 mm (4.1 in) |
| 1991 | 82.4 mm (3.2 in) |
| 1992 | 94.2 mm (3.7 in) |
| 1993 | 120.1 mm (4.7 in) |
| 1994 | 62.3 mm (2.5 in) |
| 1995 | 87.7 mm (3.5 in) |
| 1996 | 77.1 mm (3.0 in) |
| 1997 | 86.7 mm (3.4 in) |
| 1998 | 103.9 mm (4.1 in) |
| 1999 | 124.0 mm (4.9 in) |
| 2000 | 158.3 mm (6.2 in) |
| 2001 | 103.1 mm (4.1 in) |
| 2002 | 96.0 mm (3.8 in) |
| 2003 | 58.3 mm (2.3 in) |
| 2004 | 169.5 mm (6.7 in) |
| 2005 | 95.1 mm (3.7 in) |
| 2006 | 64.0 mm (2.5 in) |
| 2007 | 169.4 mm (6.7 in) |
| 2008 | 233.4 mm (9.2 in) |
| 2009 | 95.1 mm (3.7 in) |
| 2010 | 90.7 mm (3.6 in) |
| 2011 | 65.6 mm (2.6 in) |
| 2012 | 72.1 mm (2.8 in) |
| 2013 | 143.0 mm (5.6 in) |
| 2014 | 124.2 mm (4.9 in) |
| 2015 | 95.7 mm (3.8 in) |
| 2016 | 224.5 mm (8.8 in) |
| 2017 | 83.9 mm (3.3 in) |
| 2018 | 148.6 mm (5.9 in) |
| 2019 | 120.7 mm (4.8 in) |
| 2020 | 132.6 mm (5.2 in) |
| 2021 | 143.3 mm (5.6 in) |
| 2022 | 110.8 mm (4.4 in) |
| 2023 | 117.1 mm (4.6 in) |
| 2024 | 110.4 mm (4.3 in) |
| 2025 | 318.6 mm (12.5 in) |
| 2026 | 142.0 mm (5.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1893 | 24 days |
| 1894 | 28 days |
| 1895 | 27 days |
| 1896 | 18 days |
| 1897 | 32 days |
| 1898 | 23 days |
| 1899 | 18 days |
| 1900 | 25 days |
| 1901 | 21 days |
| 1902 | 19 days |
| 1903 | 30 days |
| 1904 | 28 days |
| 1905 | 17 days |
| 1906 | 21 days |
| 1907 | 21 days |
| 1908 | 30 days |
| 1909 | 24 days |
| 1910 | 42 days |
| 1911 | 27 days |
| 1912 | 32 days |
| 1913 | 29 days |
| 1914 | 32 days |
| 1915 | 34 days |
| 1916 | 21 days |
| 1917 | 28 days |
| 1918 | 31 days |
| 1919 | 26 days |
| 1920 | 12 days |
| 1921 | 15 days |
| 1922 | 17 days |
| 1923 | 20 days |
| 1924 | 19 days |
| 1925 | 23 days |
| 1926 | 16 days |
| 1927 | 18 days |
| 1928 | 17 days |
| 1929 | 17 days |
| 1930 | 23 days |
| 1931 | 18 days |
| 1932 | 24 days |
| 1933 | 26 days |
| 1934 | 33 days |
| 1935 | 25 days |
| 1936 | 25 days |
| 1937 | 19 days |
| 1938 | 21 days |
| 1939 | 20 days |
| 1940 | 17 days |
| 1948 | 22 days |
| 1949 | 28 days |
| 1950 | 31 days |
| 1951 | 20 days |
| 1952 | 58 days |
| 1953 | 28 days |
| 1954 | 23 days |
| 1955 | 22 days |
| 1956 | 23 days |
| 1957 | 29 days |
| 1958 | 33 days |
| 1959 | 26 days |
| 1960 | 22 days |
| 1961 | 23 days |
| 1962 | 27 days |
| 1963 | 25 days |
| 1964 | 40 days |
| 1965 | 21 days |
| 1966 | 24 days |
| 1967 | 20 days |
| 1968 | 30 days |
| 1969 | 48 days |
| 1970 | 23 days |
| 1971 | 23 days |
| 1972 | 37 days |
| 1973 | 16 days |
| 1974 | 19 days |
| 1975 | 23 days |
| 1976 | 32 days |
| 1977 | 18 days |
| 1978 | 20 days |
| 1979 | 21 days |
| 1980 | 31 days |
| 1981 | 25 days |
| 1982 | 28 days |
| 1983 | 18 days |
| 1984 | 23 days |
| 1985 | 18 days |
| 1986 | 23 days |
| 1987 | 30 days |
| 1988 | 36 days |
| 1989 | 14 days |
| 1990 | 13 days |
| 1991 | 33 days |
| 1992 | 22 days |
| 1993 | 22 days |
| 1994 | 20 days |
| 1995 | 36 days |
| 1996 | 13 days |
| 1997 | 21 days |
| 1998 | 39 days |
| 1999 | 24 days |
| 2000 | 17 days |
| 2001 | 29 days |
| 2002 | 36 days |
| 2003 | 23 days |
| 2004 | 16 days |
| 2005 | 17 days |
| 2006 | 25 days |
| 2007 | 42 days |
| 2008 | 15 days |
| 2009 | 31 days |
| 2010 | 28 days |
| 2011 | 16 days |
| 2012 | 21 days |
| 2013 | 23 days |
| 2014 | 19 days |
| 2015 | 24 days |
| 2016 | 16 days |
| 2017 | 25 days |
| 2018 | 24 days |
| 2019 | 18 days |
| 2020 | 33 days |
| 2021 | 18 days |
| 2022 | 31 days |
| 2023 | 30 days |
| 2024 | 32 days |
| 2025 | 42 days |
| 2026 | 18 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
115 years with a frostAcross 115 years with a frost, the median last spring frost at Decorah falls on 8 May and the median first autumn frost on 1 October, which leaves a median of 146 days between them.
In 1996 to 2025 the median growing season was 147 days. That is 8 days more than in 1895 to 1929.
Fitted over all years, the growing season changes by +1.2 days per decade at this station.
| Measure | Median, all years | Earliest period (1895 to 1929) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 8 May | 14 May | 11 May | 3 days earlier | -0.4 days per decade |
| First autumn frost | 1 October | 26 September | 6 October | 10 days later | +0.7 days per decade |
| Growing days | 146 days | 139 days | 147 days | 8 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
118 years, 1894 to 2025A day with at least 61.3 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 189.2 mm (7.4 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 61.3 mm (2.4 in) | |
| 5 years | 84.5 mm (3.3 in) | |
| 10 years | 103.5 mm (4.1 in) | |
| 25 years | 132.6 mm (5.2 in) | |
| 50 years | 158.8 mm (6.3 in) | |
| 100 years | 189.2 mm (7.4 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 118 years of values from 1894 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: 219.5 mm (8.6 in) in 2025; 204.7 mm (8.1 in) in 2016; 167.6 mm (6.6 in) in 2008.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Decorah, at 1983 and 2019. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1983 ran 0.3 C (0.5 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2019 ran 0.4 C (0.6 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1983 | +0.3 | +0.5 | likely | 5 |
| 2019 | +0.4 | +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
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Decorah had a mean temperature of 9.3 C (48.7 F) and 984.2 mm (38.7 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are De Kalb (United States, 290 km away), Park Forest Water (United States, 393 km away) and Tipton (United States, 178 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| De Kalb | United States | 290 km (180 mi) | 9.3 C (48.8 F) | 934.5 mm (36.8 in) | 0.70 |
| Park Forest Water | United States | 393 km (244 mi) | 9.3 C (48.8 F) | 918.3 mm (36.2 in) | 0.74 |
| Tipton | United States | 178 km (111 mi) | 9.1 C (48.4 F) | 957.0 mm (37.7 in) | 0.75 |
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-17).