Iowa City Weather Records (USC00134101)
Record envelope, standing records and threshold days for Iowa City (USC00134101), Iowa, United States, with 134 years of record.
Key Facts for Iowa City
- Iowa City (USC00134101) is a weather station in Iowa, United States at 41.61 latitude and -91.50 longitude, 195 m (640 ft) above sea level.
- The station reports from 1893 to 2026, 134 years of record.
- 1,464 records set at Iowa City still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Iowa City set a daily record precipitation of 86.4 mm (3.4 in) on 20 September 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, 41.61 latitude, -91.50 longitude.
- Elevation: 195 m (640 ft).
- Period of record: 1893 to 2026, 134 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
5 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 20.0 C (68.0 F) | -35.6 C (-32.1 F) | 14.4 C (57.9 F) | -25.0 C (-13.0 F) |
| Feb | 25.0 C (77.0 F) | -35.6 C (-32.1 F) | 21.1 C (70.0 F) | -17.2 C (1.0 F) |
| Mar | 32.2 C (90.0 F) | -27.2 C (-17.0 F) | 32.2 C (90.0 F) | -14.4 C (6.1 F) |
| Apr | 33.9 C (93.0 F) | -12.2 C (10.0 F) | 29.4 C (84.9 F) | -2.8 C (27.0 F) |
| May | 40.6 C (105.1 F) | -4.4 C (24.1 F) | 32.8 C (91.0 F) | -2.2 C (28.0 F) |
| Jun | 40.6 C (105.1 F) | 2.8 C (37.0 F) | 33.3 C (91.9 F) | 8.3 C (46.9 F) |
| Jul | 42.8 C (109.0 F) | 4.4 C (39.9 F) | 34.4 C (93.9 F) | 10.6 C (51.1 F) |
| Aug | 42.2 C (108.0 F) | 3.3 C (37.9 F) | 32.8 C (91.0 F) | 9.4 C (48.9 F) |
| Sep | 38.3 C (100.9 F) | -6.7 C (19.9 F) | 35.6 C (96.1 F) | 9.4 C (48.9 F) |
| Oct | 34.4 C (93.9 F) | -15.6 C (3.9 F) | 30.0 C (86.0 F) | 5.6 C (42.1 F) |
| Nov | 27.2 C (81.0 F) | -21.1 C (-6.0 F) | n/a | n/a |
| Dec | 23.3 C (73.9 F) | -32.8 C (-27.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1893 | 17 |
| 1894 | 14 |
| 1895 | 9 |
| 1896 | 10 |
| 1897 | 14 |
| 1898 | 7 |
| 1899 | 19 |
| 1900 | 7 |
| 1901 | 19 |
| 1902 | 14 |
| 1903 | 11 |
| 1904 | 9 |
| 1905 | 14 |
| 1906 | 13 |
| 1907 | 16 |
| 1908 | 8 |
| 1909 | 22 |
| 1910 | 16 |
| 1911 | 13 |
| 1912 | 25 |
| 1913 | 18 |
| 1914 | 13 |
| 1915 | 21 |
| 1916 | 18 |
| 1917 | 29 |
| 1918 | 15 |
| 1919 | 6 |
| 1920 | 9 |
| 1921 | 12 |
| 1922 | 6 |
| 1923 | 11 |
| 1924 | 12 |
| 1925 | 23 |
| 1926 | 11 |
| 1927 | 13 |
| 1928 | 16 |
| 1929 | 13 |
| 1930 | 32 |
| 1931 | 14 |
| 1932 | 11 |
| 1933 | 10 |
| 1934 | 25 |
| 1935 | 9 |
| 1936 | 30 |
| 1937 | 8 |
| 1938 | 7 |
| 1939 | 11 |
| 1940 | 8 |
| 1941 | 6 |
| 1942 | 10 |
| 1943 | 8 |
| 1944 | 10 |
| 1945 | 9 |
| 1946 | 11 |
| 1947 | 9 |
| 1948 | 1 |
| 1949 | 6 |
| 1950 | 10 |
| 1951 | 10 |
| 1952 | 10 |
| 1953 | 10 |
| 1954 | 5 |
| 1955 | 5 |
| 1956 | 6 |
| 1957 | 3 |
| 1958 | 9 |
| 1959 | 9 |
| 1960 | 12 |
| 1961 | 4 |
| 1962 | 11 |
| 1963 | 9 |
| 1964 | 14 |
| 1965 | 6 |
| 1966 | 10 |
| 1967 | 7 |
| 1968 | 4 |
| 1969 | 1 |
| 1970 | 9 |
| 1971 | 5 |
| 1972 | 4 |
| 1973 | 6 |
| 1974 | 5 |
| 1975 | 6 |
| 1976 | 3 |
| 1977 | 9 |
| 1978 | 2 |
| 1979 | 5 |
| 1980 | 6 |
| 1981 | 8 |
| 1982 | 12 |
| 1983 | 21 |
| 1984 | 10 |
| 1985 | 12 |
| 1986 | 7 |
| 1987 | 9 |
| 1988 | 16 |
| 1989 | 7 |
| 1990 | 17 |
| 1991 | 19 |
| 1992 | 11 |
| 1993 | 5 |
| 1994 | 9 |
| 1995 | 7 |
| 1996 | 8 |
| 1997 | 7 |
| 1998 | 16 |
| 1999 | 7 |
| 2000 | 17 |
| 2001 | 13 |
| 2002 | 12 |
| 2003 | 12 |
| 2004 | 11 |
| 2005 | 12 |
| 2006 | 16 |
| 2007 | 7 |
| 2008 | 3 |
| 2009 | 10 |
| 2010 | 5 |
| 2011 | 10 |
| 2012 | 26 |
| 2013 | 12 |
| 2014 | 9 |
| 2015 | 11 |
| 2016 | 1 |
| 2017 | 12 |
| 2018 | 12 |
| 2019 | 14 |
| 2020 | 9 |
| 2021 | 9 |
| 2022 | 10 |
| 2023 | 5 |
| 2024 | 11 |
| 2025 | 6 |
| 2026 | 8 |
All-Time Record Progression
9 new records| Date | Kind | Detail |
|---|---|---|
| 1936-07-14 | Record high maximum temperature | Record high maximum temperature 42.8 C (109.0 F) |
| 1944-12-10 | Record daily snowfall | Record daily snowfall 36.1 cm (14.2 in) |
| 1962-07-14 | Record daily precipitation | Record daily precipitation 175.5 mm (6.9 in) |
| 1983-08-17 | Record high minimum temperature | Record high minimum temperature 26.7 C (80.1 F) |
| 1991-07-21 | Record high minimum temperature | Record high minimum temperature 27.2 C (81.0 F) |
| 1997-07-26 | Record high minimum temperature | Record high minimum temperature 28.9 C (84.0 F) |
| 2000-12-29 | Record snow depth | Record snow depth 55.9 cm (22.0 in) |
| 2000-12-31 | Record snow depth | Record snow depth 58.4 cm (23.0 in) |
| 2001-01-01 | Record snow depth | Record snow depth 61.0 cm (24.0 in) |
Wettest Day of Each Month
Jul: 175.5 mm (6.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 53.3 mm (2.1 in) | 12 January 1960 |
| Feb | 48.8 mm (1.9 in) | 17 February 1911 |
| Mar | 69.6 mm (2.7 in) | 8 March 2009 |
| Apr | 104.6 mm (4.1 in) | 24 April 1965 |
| May | 133.6 mm (5.3 in) | 10 May 1996 |
| Jun | 152.9 mm (6.0 in) | 22 June 2007 |
| Jul | 175.5 mm (6.9 in) | 14 July 1962 |
| Aug | 109.7 mm (4.3 in) | 2 August 1921 |
| Sep | 121.9 mm (4.8 in) | 26 September 1930 |
| Oct | 81.3 mm (3.2 in) | 6 October 2018 |
| Nov | 118.9 mm (4.7 in) | 17 November 1952 |
| Dec | 72.6 mm (2.9 in) | 15 December 1971 |
Period of Record Coverage
1893 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1893 | 360 | 99% | Yes |
| 1894 | 360 | 99% | Yes |
| 1895 | 332 | 91% | Yes |
| 1896 | 359 | 98% | Yes |
| 1897 | 362 | 99% | Yes |
| 1898 | 363 | 99% | Yes |
| 1899 | 365 | 100% | Yes |
| 1900 | 363 | 99% | Yes |
| 1901 | 363 | 99% | Yes |
| 1902 | 363 | 99% | Yes |
| 1903 | 364 | 100% | Yes |
| 1904 | 366 | 100% | Yes |
| 1905 | 356 | 98% | Yes |
| 1906 | 355 | 97% | Yes |
| 1907 | 364 | 100% | Yes |
| 1908 | 365 | 100% | Yes |
| 1909 | 364 | 100% | Yes |
| 1910 | 363 | 99% | Yes |
| 1911 | 364 | 100% | Yes |
| 1912 | 365 | 100% | Yes |
| 1913 | 364 | 100% | Yes |
| 1914 | 365 | 100% | Yes |
| 1915 | 365 | 100% | Yes |
| 1916 | 366 | 100% | Yes |
| 1917 | 365 | 100% | Yes |
| 1918 | 365 | 100% | Yes |
| 1919 | 363 | 99% | Yes |
| 1920 | 366 | 100% | Yes |
| 1921 | 365 | 100% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 363 | 99% | Yes |
| 1928 | 363 | 99% | Yes |
| 1929 | 364 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 364 | 99% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 364 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 364 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 303 | 83% | No |
| 1948 | 213 | 58% | No |
| 1949 | 214 | 59% | No |
| 1950 | 214 | 59% | No |
| 1951 | 258 | 71% | No |
| 1952 | 360 | 98% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 359 | 98% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 358 | 98% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 363 | 99% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 363 | 99% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 359 | 98% | Yes |
| 1975 | 363 | 99% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 363 | 99% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 364 | 100% | Yes |
| 1984 | 364 | 99% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 360 | 99% | Yes |
| 1992 | 340 | 93% | Yes |
| 1993 | 335 | 92% | Yes |
| 1994 | 362 | 99% | Yes |
| 1995 | 359 | 98% | Yes |
| 1996 | 362 | 99% | Yes |
| 1997 | 357 | 98% | Yes |
| 1998 | 355 | 97% | Yes |
| 1999 | 362 | 99% | Yes |
| 2000 | 358 | 98% | Yes |
| 2001 | 350 | 96% | Yes |
| 2002 | 362 | 99% | Yes |
| 2003 | 361 | 99% | Yes |
| 2004 | 364 | 99% | Yes |
| 2005 | 359 | 98% | Yes |
| 2006 | 355 | 97% | Yes |
| 2007 | 336 | 92% | Yes |
| 2008 | 357 | 98% | Yes |
| 2009 | 357 | 98% | Yes |
| 2010 | 361 | 99% | Yes |
| 2011 | 357 | 98% | Yes |
| 2012 | 364 | 99% | Yes |
| 2013 | 364 | 100% | Yes |
| 2014 | 336 | 92% | Yes |
| 2015 | 363 | 99% | Yes |
| 2016 | 364 | 99% | Yes |
| 2017 | 364 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 360 | 99% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 361 | 99% | Yes |
| 2022 | 360 | 99% | Yes |
| 2023 | 357 | 98% | Yes |
| 2024 | 364 | 99% | Yes |
| 2025 | 355 | 97% | Yes |
| 2026 | 281 | 77% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 20 September 2026 | Iowa City, US | daily rain (Provisional) | 86.4 mm (3.4 in) | 28.2 mm (1.1 in) | 60 years | 48 of 100 (Notable) |
| 24 July 2026 | Iowa City, US | daily low max (Tie) | 21.7 C (71.1 F) | tie | 129 years | 10 of 100 (Routine) |
| 24 July 2026 | Iowa City, US | daily low min (Tie) | 10.6 C (51.1 F) | tie | 120 years | 10 of 100 (Routine) |
| 4 July 2026 | Iowa City, US | daily rain | 43.2 mm (1.7 in) | 2.6 mm (0.10 in) | 97 years | 40 of 100 (Notable) |
| 30 June 2026 | Iowa City, US | daily high min | 25.0 C (77.0 F) | 0.6 C (1.1 F) | 35 years | 21 of 100 (Routine) |
| 22 June 2026 | Iowa City, US | daily low max | 18.3 C (64.9 F) | 1.7 C (3.1 F) | 120 years | 44 of 100 (Notable) |
| 10 June 2026 | Iowa City, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 25 years | 4 of 100 (Routine) |
| 15 April 2026 | Iowa City, US | daily high min (Tie) | 15.6 C (60.1 F) | tie | 49 years | 6 of 100 (Routine) |
| 3 April 2026 | Iowa City, US | daily rain (Tie) | 33.0 mm (1.3 in) | tie | 1 year | 2 of 100 (Routine) |
| 31 March 2026 | Iowa City, US | daily high max | 30.0 C (86.0 F) | 3.3 C (5.9 F) | 48 years | 28 of 100 (Routine) |
| 22 March 2026 | Iowa City, US | monthly high max | 32.2 C (90.0 F) | 1.1 C (2.0 F) | 39 years | 32 of 100 (Routine) |
| 18 March 2026 | Iowa City, US | daily low max | -3.3 C (26.1 F) | 0.5 C (0.9 F) | 36 years | 21 of 100 (Routine) |
| 10 March 2026 | Iowa City, US | daily high max | 25.6 C (78.1 F) | 1.2 C (2.2 F) | 131 years | 41 of 100 (Notable) |
| 17 February 2026 | Iowa City, US | daily high max | 21.1 C (70.0 F) | 2.2 C (4.0 F) | 44 years | 26 of 100 (Routine) |
| 24 January 2026 | Iowa City, US | daily low max | -19.4 C (-2.9 F) | 1.1 C (2.0 F) | 90 years | 38 of 100 (Notable) |
| 9 December 2025 | Iowa City, US | daily snow depth | 25.4 cm (10.0 in) | 2.5 cm (1.0 in) | 48 years | 27 of 100 (Routine) |
| 8 December 2025 | Iowa City, US | daily snow depth | 33.0 cm (13.0 in) | 5.1 cm (2.0 in) | 20 years | 22 of 100 (Routine) |
| 7 December 2025 | Iowa City, US | daily snow depth | 33.0 cm (13.0 in) | 10.1 cm (4.0 in) | 56 years | 39 of 100 (Notable) |
| 6 December 2025 | Iowa City, US | daily snow depth (Tie) | 20.3 cm (8.0 in) | tie | 20 years | 4 of 100 (Routine) |
| 5 December 2025 | Iowa City, US | daily snow depth (Tie) | 20.3 cm (8.0 in) | tie | 35 years | 5 of 100 (Routine) |
Climate Trend
124 complete years, 1893 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1893 | 8.6 C | -1.58 C |
| 1894 | 10.5 C | +0.33 C |
| 1896 | 10.3 C | +0.15 C |
| 1897 | 9.5 C | -0.65 C |
| 1898 | 9.5 C | -0.65 C |
| 1899 | 9.6 C | -0.58 C |
| 1900 | 10.3 C | +0.14 C |
| 1901 | 9.9 C | -0.20 C |
| 1902 | 9.5 C | -0.61 C |
| 1903 | 9.0 C | -1.11 C |
| 1904 | 8.0 C | -2.14 C |
| 1906 | 9.4 C | -0.77 C |
| 1907 | 9.1 C | -1.07 C |
| 1908 | 10.0 C | -0.15 C |
| 1909 | 9.0 C | -1.17 C |
| 1910 | 8.7 C | -1.48 C |
| 1911 | 9.3 C | -0.87 C |
| 1912 | 7.7 C | -2.41 C |
| 1913 | 9.7 C | -0.41 C |
| 1914 | 9.3 C | -0.88 C |
| 1915 | 8.7 C | -1.39 C |
| 1916 | 8.7 C | -1.45 C |
| 1917 | 6.9 C | -3.20 C |
| 1918 | 9.2 C | -0.93 C |
| 1919 | 9.7 C | -0.39 C |
| 1920 | 9.4 C | -0.74 C |
| 1921 | 11.7 C | +1.61 C |
| 1922 | 10.6 C | +0.51 C |
| 1923 | 9.8 C | -0.33 C |
| 1924 | 8.4 C | -1.74 C |
| 1925 | 9.4 C | -0.75 C |
| 1926 | 9.4 C | -0.77 C |
| 1927 | 10.0 C | -0.17 C |
| 1928 | 10.0 C | -0.12 C |
| 1929 | 8.6 C | -1.52 C |
| 1930 | 10.4 C | +0.23 C |
| 1931 | 12.2 C | +2.02 C |
| 1932 | 9.8 C | -0.30 C |
| 1933 | 10.8 C | +0.65 C |
| 1934 | 11.2 C | +1.02 C |
| 1935 | 9.6 C | -0.51 C |
| 1936 | 9.7 C | -0.44 C |
| 1937 | 8.8 C | -1.29 C |
| 1938 | 11.0 C | +0.89 C |
| 1939 | 10.8 C | +0.69 C |
| 1940 | 9.3 C | -0.81 C |
| 1941 | 11.1 C | +0.93 C |
| 1942 | 9.9 C | -0.20 C |
| 1943 | 9.2 C | -0.90 C |
| 1944 | 10.0 C | -0.09 C |
| 1945 | 9.1 C | -1.08 C |
| 1946 | 10.7 C | +0.61 C |
| 1952 | 10.0 C | -0.18 C |
| 1953 | 10.7 C | +0.61 C |
| 1954 | 11.0 C | +0.83 C |
| 1955 | 10.2 C | +0.10 C |
| 1956 | 10.4 C | +0.23 C |
| 1957 | 10.4 C | +0.24 C |
| 1958 | 9.3 C | -0.86 C |
| 1959 | 9.6 C | -0.51 C |
| 1960 | 9.3 C | -0.86 C |
| 1961 | 9.6 C | -0.57 C |
| 1962 | 9.0 C | -1.18 C |
| 1963 | 9.3 C | -0.83 C |
| 1964 | 10.4 C | +0.28 C |
| 1965 | 9.9 C | -0.25 C |
| 1966 | 9.5 C | -0.67 C |
| 1967 | 9.8 C | -0.35 C |
| 1968 | 10.6 C | +0.45 C |
| 1969 | 9.8 C | -0.32 C |
| 1970 | 10.4 C | +0.22 C |
| 1971 | 10.7 C | +0.54 C |
| 1972 | 9.5 C | -0.59 C |
| 1973 | 11.4 C | +1.23 C |
| 1974 | 10.5 C | +0.35 C |
| 1975 | 10.9 C | +0.74 C |
| 1976 | 10.2 C | +0.04 C |
| 1977 | 10.9 C | +0.79 C |
| 1978 | 9.4 C | -0.73 C |
| 1979 | 9.5 C | -0.59 C |
| 1980 | 10.9 C | +0.78 C |
| 1981 | 11.3 C | +1.18 C |
| 1982 | 10.0 C | -0.14 C |
| 1983 | 10.9 C | +0.79 C |
| 1984 | 10.8 C | +0.63 C |
| 1985 | 9.7 C | -0.39 C |
| 1986 | 11.0 C | +0.89 C |
| 1987 | 12.5 C | +2.39 C |
| 1988 | 11.2 C | +1.08 C |
| 1989 | 10.2 C | +0.02 C |
| 1990 | 11.7 C | +1.59 C |
| 1991 | 11.6 C | +1.46 C |
| 1992 | 10.8 C | +0.68 C |
| 1993 | 10.1 C | -0.02 C |
| 1994 | 11.0 C | +0.83 C |
| 1995 | 10.7 C | +0.53 C |
| 1996 | 9.7 C | -0.46 C |
| 1997 | 10.5 C | +0.38 C |
| 1998 | 12.6 C | +2.48 C |
| 1999 | 12.0 C | +1.82 C |
| 2000 | 11.2 C | +1.11 C |
| 2002 | 11.5 C | +1.41 C |
| 2003 | 10.3 C | +0.15 C |
| 2004 | 11.1 C | +0.94 C |
| 2005 | 11.5 C | +1.39 C |
| 2006 | 12.0 C | +1.87 C |
| 2007 | 11.4 C | +1.28 C |
| 2008 | 9.8 C | -0.37 C |
| 2009 | 10.3 C | +0.19 C |
| 2010 | 11.2 C | +1.04 C |
| 2011 | 11.3 C | +1.17 C |
| 2012 | 12.9 C | +2.78 C |
| 2013 | 9.3 C | -0.80 C |
| 2015 | 9.8 C | -0.34 C |
| 2016 | 10.9 C | +0.78 C |
| 2017 | 10.3 C | +0.14 C |
| 2018 | 9.0 C | -1.12 C |
| 2019 | 9.0 C | -1.16 C |
| 2020 | 10.1 C | -0.01 C |
| 2021 | 10.3 C | +0.12 C |
| 2022 | 9.2 C | -0.96 C |
| 2023 | 10.9 C | +0.77 C |
| 2024 | 11.5 C | +1.34 C |
| 2025 | 10.2 C | +0.10 C |
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1893 to 2025. In Fahrenheit: 0.2 F (0.2 to 0.3) per decade. The slope is a straight line fitted to 124 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 (0.2 to 0.3) per decade | 1893 to 2025 | 124 | Rise |
| Mean daily maximum | 0.1 C (0.1 to 0.1) per decade | 0.2 F (0.1 to 0.3) per decade | 1893 to 2025 | 124 | Rise |
| Mean daily minimum | 0.1 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1893 to 2025 | 124 | 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) | 42.8 C (109.0 F) | 1936 | 36.7 C (98.1 F) | 134 |
| Coldest night (TNn) | -35.6 C (-32.1 F) | 1905 | -25.6 C (-14.1 F) | 134 |
| Wettest day (Rx1day) | 175.5 mm (6.9 in) | 1962 | 63.0 mm (2.5 in) | 134 |
| Wettest five days (Rx5day) | 229.9 mm (9.1 in) | 2014 | 102.5 mm (4.0 in) | 134 |
| Longest dry spell (CDD) | 63 days | 1952 | 23 days | 134 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1893 | 37.2 C (99.0 F) |
| 1894 | 38.3 C (100.9 F) |
| 1895 | 37.8 C (100.0 F) |
| 1896 | 36.7 C (98.1 F) |
| 1897 | 37.8 C (100.0 F) |
| 1898 | 37.2 C (99.0 F) |
| 1899 | 38.3 C (100.9 F) |
| 1900 | 37.2 C (99.0 F) |
| 1901 | 42.2 C (108.0 F) |
| 1902 | 35.0 C (95.0 F) |
| 1903 | 36.1 C (97.0 F) |
| 1904 | 35.6 C (96.1 F) |
| 1905 | 35.6 C (96.1 F) |
| 1906 | 36.1 C (97.0 F) |
| 1907 | 36.1 C (97.0 F) |
| 1908 | 36.7 C (98.1 F) |
| 1909 | 37.8 C (100.0 F) |
| 1910 | 36.7 C (98.1 F) |
| 1911 | 40.0 C (104.0 F) |
| 1912 | 36.7 C (98.1 F) |
| 1913 | 38.9 C (102.0 F) |
| 1914 | 37.2 C (99.0 F) |
| 1915 | 32.8 C (91.0 F) |
| 1916 | 38.9 C (102.0 F) |
| 1917 | 37.8 C (100.0 F) |
| 1918 | 38.3 C (100.9 F) |
| 1919 | 37.8 C (100.0 F) |
| 1920 | 35.0 C (95.0 F) |
| 1921 | 37.2 C (99.0 F) |
| 1922 | 37.8 C (100.0 F) |
| 1923 | 36.7 C (98.1 F) |
| 1924 | 34.4 C (93.9 F) |
| 1925 | 37.2 C (99.0 F) |
| 1926 | 37.2 C (99.0 F) |
| 1927 | 36.1 C (97.0 F) |
| 1928 | 33.9 C (93.0 F) |
| 1929 | 35.0 C (95.0 F) |
| 1930 | 41.7 C (107.1 F) |
| 1931 | 38.9 C (102.0 F) |
| 1932 | 36.7 C (98.1 F) |
| 1933 | 37.2 C (99.0 F) |
| 1934 | 40.6 C (105.1 F) |
| 1935 | 36.7 C (98.1 F) |
| 1936 | 42.8 C (109.0 F) |
| 1937 | 36.7 C (98.1 F) |
| 1938 | 35.0 C (95.0 F) |
| 1939 | 37.2 C (99.0 F) |
| 1940 | 40.6 C (105.1 F) |
| 1941 | 37.8 C (100.0 F) |
| 1942 | 35.6 C (96.1 F) |
| 1943 | 35.0 C (95.0 F) |
| 1944 | 35.0 C (95.0 F) |
| 1945 | 36.1 C (97.0 F) |
| 1946 | 35.0 C (95.0 F) |
| 1947 | 38.9 C (102.0 F) |
| 1948 | 36.7 C (98.1 F) |
| 1949 | 35.0 C (95.0 F) |
| 1950 | 34.4 C (93.9 F) |
| 1951 | 33.9 C (93.0 F) |
| 1952 | 35.6 C (96.1 F) |
| 1953 | 36.7 C (98.1 F) |
| 1954 | 37.8 C (100.0 F) |
| 1955 | 38.3 C (100.9 F) |
| 1956 | 37.2 C (99.0 F) |
| 1957 | 37.8 C (100.0 F) |
| 1958 | 33.3 C (91.9 F) |
| 1959 | 33.9 C (93.0 F) |
| 1960 | 36.1 C (97.0 F) |
| 1961 | 33.9 C (93.0 F) |
| 1962 | 35.0 C (95.0 F) |
| 1963 | 37.8 C (100.0 F) |
| 1964 | 36.1 C (97.0 F) |
| 1965 | 36.7 C (98.1 F) |
| 1966 | 37.2 C (99.0 F) |
| 1967 | 35.0 C (95.0 F) |
| 1968 | 36.1 C (97.0 F) |
| 1969 | 34.4 C (93.9 F) |
| 1970 | 36.1 C (97.0 F) |
| 1971 | 36.7 C (98.1 F) |
| 1972 | 35.0 C (95.0 F) |
| 1973 | 35.0 C (95.0 F) |
| 1974 | 36.7 C (98.1 F) |
| 1975 | 37.2 C (99.0 F) |
| 1976 | 35.6 C (96.1 F) |
| 1977 | 38.3 C (100.9 F) |
| 1978 | 34.4 C (93.9 F) |
| 1979 | 35.0 C (95.0 F) |
| 1980 | 37.8 C (100.0 F) |
| 1981 | 36.1 C (97.0 F) |
| 1982 | 35.6 C (96.1 F) |
| 1983 | 39.4 C (102.9 F) |
| 1984 | 37.2 C (99.0 F) |
| 1985 | 36.7 C (98.1 F) |
| 1986 | 35.0 C (95.0 F) |
| 1987 | 38.9 C (102.0 F) |
| 1988 | 40.0 C (104.0 F) |
| 1989 | 37.8 C (100.0 F) |
| 1990 | 36.7 C (98.1 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 33.3 C (91.9 F) |
| 1993 | 34.4 C (93.9 F) |
| 1994 | 35.0 C (95.0 F) |
| 1995 | 38.9 C (102.0 F) |
| 1996 | 35.6 C (96.1 F) |
| 1997 | 37.2 C (99.0 F) |
| 1998 | 36.1 C (97.0 F) |
| 1999 | 38.3 C (100.9 F) |
| 2000 | 36.1 C (97.0 F) |
| 2001 | 35.6 C (96.1 F) |
| 2002 | 36.1 C (97.0 F) |
| 2003 | 38.3 C (100.9 F) |
| 2004 | 32.8 C (91.0 F) |
| 2005 | 38.3 C (100.9 F) |
| 2006 | 39.4 C (102.9 F) |
| 2007 | 36.1 C (97.0 F) |
| 2008 | 34.4 C (93.9 F) |
| 2009 | 35.0 C (95.0 F) |
| 2010 | 37.8 C (100.0 F) |
| 2011 | 38.9 C (102.0 F) |
| 2012 | 41.1 C (106.0 F) |
| 2013 | 38.3 C (100.9 F) |
| 2014 | 33.3 C (91.9 F) |
| 2015 | 34.4 C (93.9 F) |
| 2016 | 34.4 C (93.9 F) |
| 2017 | 34.4 C (93.9 F) |
| 2018 | 36.1 C (97.0 F) |
| 2019 | 34.4 C (93.9 F) |
| 2020 | 35.6 C (96.1 F) |
| 2021 | 35.0 C (95.0 F) |
| 2022 | 36.1 C (97.0 F) |
| 2023 | 37.2 C (99.0 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 | -28.9 C (-20.0 F) |
| 1894 | -34.4 C (-29.9 F) |
| 1895 | -30.6 C (-23.1 F) |
| 1896 | -23.9 C (-11.0 F) |
| 1897 | -28.9 C (-20.0 F) |
| 1898 | -24.4 C (-11.9 F) |
| 1899 | -32.2 C (-26.0 F) |
| 1900 | -24.4 C (-11.9 F) |
| 1901 | -29.4 C (-20.9 F) |
| 1902 | -30.6 C (-23.1 F) |
| 1903 | -27.8 C (-18.0 F) |
| 1904 | -29.4 C (-20.9 F) |
| 1905 | -35.6 C (-32.1 F) |
| 1906 | -23.3 C (-9.9 F) |
| 1907 | -26.7 C (-16.1 F) |
| 1908 | -22.8 C (-9.0 F) |
| 1909 | -28.3 C (-18.9 F) |
| 1910 | -32.2 C (-26.0 F) |
| 1911 | -26.7 C (-16.1 F) |
| 1912 | -33.3 C (-27.9 F) |
| 1913 | -25.6 C (-14.1 F) |
| 1914 | -30.0 C (-22.0 F) |
| 1915 | -30.6 C (-23.1 F) |
| 1916 | -31.7 C (-25.1 F) |
| 1917 | -29.4 C (-20.9 F) |
| 1918 | -30.6 C (-23.1 F) |
| 1919 | -31.7 C (-25.1 F) |
| 1920 | -25.0 C (-13.0 F) |
| 1921 | -28.3 C (-18.9 F) |
| 1922 | -25.6 C (-14.1 F) |
| 1923 | -25.6 C (-14.1 F) |
| 1924 | -32.8 C (-27.0 F) |
| 1925 | -23.9 C (-11.0 F) |
| 1926 | -23.3 C (-9.9 F) |
| 1927 | -26.7 C (-16.1 F) |
| 1928 | -23.9 C (-11.0 F) |
| 1929 | -30.0 C (-22.0 F) |
| 1930 | -35.0 C (-31.0 F) |
| 1931 | -20.6 C (-5.1 F) |
| 1932 | -25.6 C (-14.1 F) |
| 1933 | -30.6 C (-23.1 F) |
| 1934 | -22.2 C (-8.0 F) |
| 1935 | -23.9 C (-11.0 F) |
| 1936 | -30.0 C (-22.0 F) |
| 1937 | -20.0 C (-4.0 F) |
| 1938 | -21.7 C (-7.1 F) |
| 1939 | -20.6 C (-5.1 F) |
| 1940 | -27.8 C (-18.0 F) |
| 1941 | -21.7 C (-7.1 F) |
| 1942 | -28.9 C (-20.0 F) |
| 1943 | -26.7 C (-16.1 F) |
| 1944 | -23.3 C (-9.9 F) |
| 1945 | -23.3 C (-9.9 F) |
| 1946 | -23.9 C (-11.0 F) |
| 1947 | -27.8 C (-18.0 F) |
| 1948 | -5.6 C (21.9 F) |
| 1949 | -5.6 C (21.9 F) |
| 1950 | -6.7 C (19.9 F) |
| 1951 | -26.7 C (-16.1 F) |
| 1952 | -21.1 C (-6.0 F) |
| 1953 | -25.0 C (-13.0 F) |
| 1954 | -25.6 C (-14.1 F) |
| 1955 | -27.8 C (-18.0 F) |
| 1956 | -26.7 C (-16.1 F) |
| 1957 | -30.6 C (-23.1 F) |
| 1958 | -27.2 C (-17.0 F) |
| 1959 | -28.9 C (-20.0 F) |
| 1960 | -24.4 C (-11.9 F) |
| 1961 | -26.7 C (-16.1 F) |
| 1962 | -28.9 C (-20.0 F) |
| 1963 | -31.1 C (-24.0 F) |
| 1964 | -21.7 C (-7.1 F) |
| 1965 | -25.6 C (-14.1 F) |
| 1966 | -30.0 C (-22.0 F) |
| 1967 | -25.6 C (-14.1 F) |
| 1968 | -25.6 C (-14.1 F) |
| 1969 | -23.9 C (-11.0 F) |
| 1970 | -29.4 C (-20.9 F) |
| 1971 | -24.4 C (-11.9 F) |
| 1972 | -27.2 C (-17.0 F) |
| 1973 | -22.2 C (-8.0 F) |
| 1974 | -29.4 C (-20.9 F) |
| 1975 | -23.3 C (-9.9 F) |
| 1976 | -25.0 C (-13.0 F) |
| 1977 | -28.9 C (-20.0 F) |
| 1978 | -24.4 C (-11.9 F) |
| 1979 | -26.7 C (-16.1 F) |
| 1980 | -20.6 C (-5.1 F) |
| 1981 | -25.0 C (-13.0 F) |
| 1982 | -30.0 C (-22.0 F) |
| 1983 | -28.9 C (-20.0 F) |
| 1984 | -27.2 C (-17.0 F) |
| 1985 | -30.6 C (-23.1 F) |
| 1986 | -24.4 C (-11.9 F) |
| 1987 | -20.6 C (-5.1 F) |
| 1988 | -25.0 C (-13.0 F) |
| 1989 | -28.3 C (-18.9 F) |
| 1990 | -22.8 C (-9.0 F) |
| 1991 | -22.8 C (-9.0 F) |
| 1992 | -21.1 C (-6.0 F) |
| 1993 | -22.8 C (-9.0 F) |
| 1994 | -28.9 C (-20.0 F) |
| 1995 | -22.2 C (-8.0 F) |
| 1996 | -32.2 C (-26.0 F) |
| 1997 | -24.4 C (-11.9 F) |
| 1998 | -20.0 C (-4.0 F) |
| 1999 | -27.8 C (-18.0 F) |
| 2000 | -24.4 C (-11.9 F) |
| 2001 | -21.7 C (-7.1 F) |
| 2002 | -20.6 C (-5.1 F) |
| 2003 | -22.2 C (-8.0 F) |
| 2004 | -22.2 C (-8.0 F) |
| 2005 | -26.1 C (-15.0 F) |
| 2006 | -21.7 C (-7.1 F) |
| 2007 | -25.6 C (-14.1 F) |
| 2008 | -25.0 C (-13.0 F) |
| 2009 | -33.9 C (-29.0 F) |
| 2010 | -26.7 C (-16.1 F) |
| 2011 | -28.3 C (-18.9 F) |
| 2012 | -20.0 C (-4.0 F) |
| 2013 | -27.8 C (-18.0 F) |
| 2014 | -28.3 C (-18.9 F) |
| 2015 | -27.8 C (-18.0 F) |
| 2016 | -24.4 C (-11.9 F) |
| 2017 | -22.8 C (-9.0 F) |
| 2018 | -30.0 C (-22.0 F) |
| 2019 | -35.6 C (-32.1 F) |
| 2020 | -22.8 C (-9.0 F) |
| 2021 | -26.7 C (-16.1 F) |
| 2022 | -23.9 C (-11.0 F) |
| 2023 | -19.4 C (-2.9 F) |
| 2024 | -28.3 C (-18.9 F) |
| 2025 | -25.0 C (-13.0 F) |
| 2026 | -25.0 C (-13.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1893 | 53.3 mm (2.1 in) |
| 1894 | 41.1 mm (1.6 in) |
| 1895 | 118.6 mm (4.7 in) |
| 1896 | 78.7 mm (3.1 in) |
| 1897 | 55.9 mm (2.2 in) |
| 1898 | 54.6 mm (2.1 in) |
| 1899 | 74.7 mm (2.9 in) |
| 1900 | 68.1 mm (2.7 in) |
| 1901 | 41.1 mm (1.6 in) |
| 1902 | 83.1 mm (3.3 in) |
| 1903 | 58.7 mm (2.3 in) |
| 1904 | 45.5 mm (1.8 in) |
| 1905 | 110.5 mm (4.4 in) |
| 1906 | 64.5 mm (2.5 in) |
| 1907 | 67.6 mm (2.7 in) |
| 1908 | 66.0 mm (2.6 in) |
| 1909 | 55.6 mm (2.2 in) |
| 1910 | 30.5 mm (1.2 in) |
| 1911 | 48.8 mm (1.9 in) |
| 1912 | 41.7 mm (1.6 in) |
| 1913 | 45.7 mm (1.8 in) |
| 1914 | 101.6 mm (4.0 in) |
| 1915 | 53.3 mm (2.1 in) |
| 1916 | 57.7 mm (2.3 in) |
| 1917 | 76.7 mm (3.0 in) |
| 1918 | 62.2 mm (2.4 in) |
| 1919 | 63.5 mm (2.5 in) |
| 1920 | 43.4 mm (1.7 in) |
| 1921 | 109.7 mm (4.3 in) |
| 1922 | 164.1 mm (6.5 in) |
| 1923 | 49.3 mm (1.9 in) |
| 1924 | 79.2 mm (3.1 in) |
| 1925 | 58.7 mm (2.3 in) |
| 1926 | 73.2 mm (2.9 in) |
| 1927 | 118.9 mm (4.7 in) |
| 1928 | 60.5 mm (2.4 in) |
| 1929 | 60.7 mm (2.4 in) |
| 1930 | 121.9 mm (4.8 in) |
| 1931 | 47.2 mm (1.9 in) |
| 1932 | 79.5 mm (3.1 in) |
| 1933 | 68.3 mm (2.7 in) |
| 1934 | 48.3 mm (1.9 in) |
| 1935 | 51.6 mm (2.0 in) |
| 1936 | 58.7 mm (2.3 in) |
| 1937 | 64.8 mm (2.6 in) |
| 1938 | 84.3 mm (3.3 in) |
| 1939 | 61.7 mm (2.4 in) |
| 1940 | 54.1 mm (2.1 in) |
| 1941 | 63.0 mm (2.5 in) |
| 1942 | 39.6 mm (1.6 in) |
| 1943 | 51.1 mm (2.0 in) |
| 1944 | 44.5 mm (1.8 in) |
| 1945 | 48.8 mm (1.9 in) |
| 1946 | 51.3 mm (2.0 in) |
| 1947 | 46.0 mm (1.8 in) |
| 1948 | 82.8 mm (3.3 in) |
| 1949 | 76.2 mm (3.0 in) |
| 1950 | 64.5 mm (2.5 in) |
| 1951 | 43.9 mm (1.7 in) |
| 1952 | 118.9 mm (4.7 in) |
| 1953 | 36.1 mm (1.4 in) |
| 1954 | 88.4 mm (3.5 in) |
| 1955 | 40.9 mm (1.6 in) |
| 1956 | 67.8 mm (2.7 in) |
| 1957 | 40.4 mm (1.6 in) |
| 1958 | 54.4 mm (2.1 in) |
| 1959 | 59.7 mm (2.4 in) |
| 1960 | 69.3 mm (2.7 in) |
| 1961 | 83.8 mm (3.3 in) |
| 1962 | 175.5 mm (6.9 in) |
| 1963 | 46.7 mm (1.8 in) |
| 1964 | 33.5 mm (1.3 in) |
| 1965 | 104.6 mm (4.1 in) |
| 1966 | 65.5 mm (2.6 in) |
| 1967 | 128.5 mm (5.1 in) |
| 1968 | 43.2 mm (1.7 in) |
| 1969 | 57.7 mm (2.3 in) |
| 1970 | 111.5 mm (4.4 in) |
| 1971 | 72.6 mm (2.9 in) |
| 1972 | 111.8 mm (4.4 in) |
| 1973 | 53.3 mm (2.1 in) |
| 1974 | 63.5 mm (2.5 in) |
| 1975 | 36.1 mm (1.4 in) |
| 1976 | 59.4 mm (2.3 in) |
| 1977 | 88.9 mm (3.5 in) |
| 1978 | 72.6 mm (2.9 in) |
| 1979 | 40.1 mm (1.6 in) |
| 1980 | 56.9 mm (2.2 in) |
| 1981 | 61.7 mm (2.4 in) |
| 1982 | 102.1 mm (4.0 in) |
| 1983 | 43.2 mm (1.7 in) |
| 1984 | 40.6 mm (1.6 in) |
| 1985 | 64.0 mm (2.5 in) |
| 1986 | 89.7 mm (3.5 in) |
| 1987 | 79.0 mm (3.1 in) |
| 1988 | 61.0 mm (2.4 in) |
| 1989 | 52.1 mm (2.1 in) |
| 1990 | 93.2 mm (3.7 in) |
| 1991 | 37.8 mm (1.5 in) |
| 1992 | 65.5 mm (2.6 in) |
| 1993 | 91.4 mm (3.6 in) |
| 1994 | 39.4 mm (1.6 in) |
| 1995 | 72.9 mm (2.9 in) |
| 1996 | 133.6 mm (5.3 in) |
| 1997 | 51.3 mm (2.0 in) |
| 1998 | 91.4 mm (3.6 in) |
| 1999 | 62.0 mm (2.4 in) |
| 2000 | 61.2 mm (2.4 in) |
| 2001 | 45.2 mm (1.8 in) |
| 2002 | 96.5 mm (3.8 in) |
| 2003 | 69.9 mm (2.8 in) |
| 2004 | 47.0 mm (1.9 in) |
| 2005 | 35.8 mm (1.4 in) |
| 2006 | 48.3 mm (1.9 in) |
| 2007 | 152.9 mm (6.0 in) |
| 2008 | 65.5 mm (2.6 in) |
| 2009 | 69.6 mm (2.7 in) |
| 2010 | 52.3 mm (2.1 in) |
| 2011 | 66.0 mm (2.6 in) |
| 2012 | 59.2 mm (2.3 in) |
| 2013 | 63.0 mm (2.5 in) |
| 2014 | 152.4 mm (6.0 in) |
| 2015 | 78.7 mm (3.1 in) |
| 2016 | 88.4 mm (3.5 in) |
| 2017 | 95.3 mm (3.8 in) |
| 2018 | 94.0 mm (3.7 in) |
| 2019 | 68.6 mm (2.7 in) |
| 2020 | 96.5 mm (3.8 in) |
| 2021 | 63.0 mm (2.5 in) |
| 2022 | 95.3 mm (3.8 in) |
| 2023 | 43.7 mm (1.7 in) |
| 2024 | 42.4 mm (1.7 in) |
| 2025 | 44.5 mm (1.8 in) |
| 2026 | 86.4 mm (3.4 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1893 | 56.4 mm (2.2 in) |
| 1894 | 59.9 mm (2.4 in) |
| 1895 | 161.3 mm (6.4 in) |
| 1896 | 87.9 mm (3.5 in) |
| 1897 | 71.1 mm (2.8 in) |
| 1898 | 81.3 mm (3.2 in) |
| 1899 | 127.8 mm (5.0 in) |
| 1900 | 102.4 mm (4.0 in) |
| 1901 | 51.0 mm (2.0 in) |
| 1902 | 118.6 mm (4.7 in) |
| 1903 | 123.8 mm (4.9 in) |
| 1904 | 117.1 mm (4.6 in) |
| 1905 | 130.8 mm (5.1 in) |
| 1906 | 103.9 mm (4.1 in) |
| 1907 | 135.7 mm (5.3 in) |
| 1908 | 95.7 mm (3.8 in) |
| 1909 | 111.3 mm (4.4 in) |
| 1910 | 56.4 mm (2.2 in) |
| 1911 | 102.7 mm (4.0 in) |
| 1912 | 72.2 mm (2.8 in) |
| 1913 | 88.9 mm (3.5 in) |
| 1914 | 107.7 mm (4.2 in) |
| 1915 | 138.9 mm (5.5 in) |
| 1916 | 120.9 mm (4.8 in) |
| 1917 | 130.3 mm (5.1 in) |
| 1918 | 127.5 mm (5.0 in) |
| 1919 | 130.5 mm (5.1 in) |
| 1920 | 66.3 mm (2.6 in) |
| 1921 | 127.7 mm (5.0 in) |
| 1922 | 189.0 mm (7.4 in) |
| 1923 | 88.7 mm (3.5 in) |
| 1924 | 89.9 mm (3.5 in) |
| 1925 | 90.9 mm (3.6 in) |
| 1926 | 133.2 mm (5.2 in) |
| 1927 | 136.6 mm (5.4 in) |
| 1928 | 85.3 mm (3.4 in) |
| 1929 | 83.3 mm (3.3 in) |
| 1930 | 155.9 mm (6.1 in) |
| 1931 | 106.7 mm (4.2 in) |
| 1932 | 106.9 mm (4.2 in) |
| 1933 | 101.7 mm (4.0 in) |
| 1934 | 85.9 mm (3.4 in) |
| 1935 | 94.2 mm (3.7 in) |
| 1936 | 86.1 mm (3.4 in) |
| 1937 | 87.1 mm (3.4 in) |
| 1938 | 91.4 mm (3.6 in) |
| 1939 | 73.4 mm (2.9 in) |
| 1940 | 78.0 mm (3.1 in) |
| 1941 | 147.6 mm (5.8 in) |
| 1942 | 65.8 mm (2.6 in) |
| 1943 | 81.0 mm (3.2 in) |
| 1944 | 68.9 mm (2.7 in) |
| 1945 | 77.6 mm (3.1 in) |
| 1946 | 111.2 mm (4.4 in) |
| 1947 | 84.6 mm (3.3 in) |
| 1948 | 115.3 mm (4.5 in) |
| 1949 | 113.0 mm (4.4 in) |
| 1950 | 84.1 mm (3.3 in) |
| 1951 | 68.5 mm (2.7 in) |
| 1952 | 118.9 mm (4.7 in) |
| 1953 | 48.5 mm (1.9 in) |
| 1954 | 110.1 mm (4.3 in) |
| 1955 | 49.2 mm (1.9 in) |
| 1956 | 79.5 mm (3.1 in) |
| 1957 | 54.2 mm (2.1 in) |
| 1958 | 80.8 mm (3.2 in) |
| 1959 | 101.3 mm (4.0 in) |
| 1960 | 106.7 mm (4.2 in) |
| 1961 | 138.9 mm (5.5 in) |
| 1962 | 207.2 mm (8.2 in) |
| 1963 | 80.2 mm (3.2 in) |
| 1964 | 75.0 mm (3.0 in) |
| 1965 | 153.2 mm (6.0 in) |
| 1966 | 99.1 mm (3.9 in) |
| 1967 | 171.4 mm (6.7 in) |
| 1968 | 95.5 mm (3.8 in) |
| 1969 | 120.2 mm (4.7 in) |
| 1970 | 192.0 mm (7.6 in) |
| 1971 | 72.6 mm (2.9 in) |
| 1972 | 141.3 mm (5.6 in) |
| 1973 | 80.3 mm (3.2 in) |
| 1974 | 142.5 mm (5.6 in) |
| 1975 | 52.6 mm (2.1 in) |
| 1976 | 94.0 mm (3.7 in) |
| 1977 | 121.7 mm (4.8 in) |
| 1978 | 135.0 mm (5.3 in) |
| 1979 | 81.5 mm (3.2 in) |
| 1980 | 86.4 mm (3.4 in) |
| 1981 | 89.4 mm (3.5 in) |
| 1982 | 126.5 mm (5.0 in) |
| 1983 | 77.3 mm (3.0 in) |
| 1984 | 123.7 mm (4.9 in) |
| 1985 | 113.6 mm (4.5 in) |
| 1986 | 138.8 mm (5.5 in) |
| 1987 | 154.7 mm (6.1 in) |
| 1988 | 71.4 mm (2.8 in) |
| 1989 | 84.0 mm (3.3 in) |
| 1990 | 149.6 mm (5.9 in) |
| 1991 | 63.6 mm (2.5 in) |
| 1992 | 107.5 mm (4.2 in) |
| 1993 | 128.8 mm (5.1 in) |
| 1994 | 89.0 mm (3.5 in) |
| 1995 | 109.3 mm (4.3 in) |
| 1996 | 168.7 mm (6.6 in) |
| 1997 | 60.8 mm (2.4 in) |
| 1998 | 110.5 mm (4.4 in) |
| 1999 | 118.1 mm (4.6 in) |
| 2000 | 101.6 mm (4.0 in) |
| 2001 | 59.9 mm (2.4 in) |
| 2002 | 130.3 mm (5.1 in) |
| 2003 | 81.6 mm (3.2 in) |
| 2004 | 74.1 mm (2.9 in) |
| 2005 | 49.3 mm (1.9 in) |
| 2006 | 77.4 mm (3.0 in) |
| 2007 | 178.6 mm (7.0 in) |
| 2008 | 92.5 mm (3.6 in) |
| 2009 | 108.5 mm (4.3 in) |
| 2010 | 120.8 mm (4.8 in) |
| 2011 | 106.1 mm (4.2 in) |
| 2012 | 85.6 mm (3.4 in) |
| 2013 | 130.1 mm (5.1 in) |
| 2014 | 229.9 mm (9.1 in) |
| 2015 | 102.5 mm (4.0 in) |
| 2016 | 109.5 mm (4.3 in) |
| 2017 | 149.2 mm (5.9 in) |
| 2018 | 156.8 mm (6.2 in) |
| 2019 | 104.7 mm (4.1 in) |
| 2020 | 110.2 mm (4.3 in) |
| 2021 | 83.3 mm (3.3 in) |
| 2022 | 108.0 mm (4.3 in) |
| 2023 | 58.7 mm (2.3 in) |
| 2024 | 82.5 mm (3.2 in) |
| 2025 | 66.0 mm (2.6 in) |
| 2026 | 147.6 mm (5.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1893 | 32 days |
| 1894 | 27 days |
| 1895 | 25 days |
| 1896 | 18 days |
| 1897 | 24 days |
| 1898 | 22 days |
| 1899 | 23 days |
| 1900 | 19 days |
| 1901 | 20 days |
| 1902 | 19 days |
| 1903 | 30 days |
| 1904 | 31 days |
| 1905 | 22 days |
| 1906 | 24 days |
| 1907 | 25 days |
| 1908 | 25 days |
| 1909 | 16 days |
| 1910 | 26 days |
| 1911 | 20 days |
| 1912 | 29 days |
| 1913 | 28 days |
| 1914 | 21 days |
| 1915 | 32 days |
| 1916 | 17 days |
| 1917 | 16 days |
| 1918 | 26 days |
| 1919 | 31 days |
| 1920 | 22 days |
| 1921 | 18 days |
| 1922 | 20 days |
| 1923 | 23 days |
| 1924 | 22 days |
| 1925 | 22 days |
| 1926 | 17 days |
| 1927 | 19 days |
| 1928 | 24 days |
| 1929 | 22 days |
| 1930 | 21 days |
| 1931 | 28 days |
| 1932 | 23 days |
| 1933 | 38 days |
| 1934 | 35 days |
| 1935 | 16 days |
| 1936 | 26 days |
| 1937 | 14 days |
| 1938 | 23 days |
| 1939 | 25 days |
| 1940 | 21 days |
| 1941 | 19 days |
| 1942 | 18 days |
| 1943 | 27 days |
| 1944 | 25 days |
| 1945 | 24 days |
| 1946 | 16 days |
| 1947 | 29 days |
| 1948 | 22 days |
| 1949 | 19 days |
| 1950 | 23 days |
| 1951 | 13 days |
| 1952 | 63 days |
| 1953 | 23 days |
| 1954 | 26 days |
| 1955 | 19 days |
| 1956 | 15 days |
| 1957 | 29 days |
| 1958 | 26 days |
| 1959 | 16 days |
| 1960 | 16 days |
| 1961 | 17 days |
| 1962 | 22 days |
| 1963 | 25 days |
| 1964 | 37 days |
| 1965 | 19 days |
| 1966 | 35 days |
| 1967 | 23 days |
| 1968 | 16 days |
| 1969 | 32 days |
| 1970 | 20 days |
| 1971 | 29 days |
| 1972 | 19 days |
| 1973 | 19 days |
| 1974 | 15 days |
| 1975 | 17 days |
| 1976 | 26 days |
| 1977 | 18 days |
| 1978 | 23 days |
| 1979 | 24 days |
| 1980 | 24 days |
| 1981 | 31 days |
| 1982 | 20 days |
| 1983 | 23 days |
| 1984 | 27 days |
| 1985 | 22 days |
| 1986 | 20 days |
| 1987 | 31 days |
| 1988 | 37 days |
| 1989 | 35 days |
| 1990 | 15 days |
| 1991 | 32 days |
| 1992 | 15 days |
| 1993 | 33 days |
| 1994 | 23 days |
| 1995 | 31 days |
| 1996 | 26 days |
| 1997 | 23 days |
| 1998 | 25 days |
| 1999 | 37 days |
| 2000 | 22 days |
| 2001 | 13 days |
| 2002 | 48 days |
| 2003 | 27 days |
| 2004 | 19 days |
| 2005 | 17 days |
| 2006 | 19 days |
| 2007 | 33 days |
| 2008 | 15 days |
| 2009 | 25 days |
| 2010 | 26 days |
| 2011 | 22 days |
| 2012 | 25 days |
| 2013 | 23 days |
| 2014 | 17 days |
| 2015 | 23 days |
| 2016 | 20 days |
| 2017 | 22 days |
| 2018 | 23 days |
| 2019 | 16 days |
| 2020 | 21 days |
| 2021 | 21 days |
| 2022 | 26 days |
| 2023 | 27 days |
| 2024 | 33 days |
| 2025 | 18 days |
| 2026 | 34 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
124 years with a frostAcross 124 years with a frost, the median last spring frost at Iowa City falls on 24 April and the median first autumn frost on 12 October, which leaves a median of 171 days between them.
In 1994 to 2025 the median growing season was 177 days. That is 12 days more than in 1893 to 1924.
Fitted over all years, the growing season changes by +1.4 days per decade at this station.
| Measure | Median, all years | Earliest period (1893 to 1924) | Recent period (1994 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 24 April | 28 April | 22 April | 6 days earlier | -0.8 days per decade |
| First autumn frost | 12 October | 8 October | 16 October | 8 days later | +0.6 days per decade |
| Growing days | 171 days | 165 days | 177 days | 12 days more | +1.4 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
127 years, 1893 to 2025A day with at least 62.3 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 174.9 mm (6.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 62.3 mm (2.5 in) | |
| 5 years | 85.7 mm (3.4 in) | |
| 10 years | 103.6 mm (4.1 in) | |
| 25 years | 129.3 mm (5.1 in) | |
| 50 years | 151.0 mm (5.9 in) | |
| 100 years | 174.9 mm (6.9 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 127 years of values from 1893 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: 175.5 mm (6.9 in) in 1962; 164.1 mm (6.5 in) in 1922; 152.9 mm (6.0 in) in 2007.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Iowa City, at 1919. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1919 ran 0.3 C (0.5 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1919 | +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
2010 to 2025 against 1961 to 1990Over 2010 to 2025, Iowa City had a mean temperature of 10.4 C (50.7 F) and 912.0 mm (35.9 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Piper City (United States, 294 km away), General Wayne A Downing Intl A (United States, 185 km away) and Chenoa (United States, 252 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Piper City | United States | 294 km (183 mi) | 10.3 C (50.5 F) | 867.1 mm (34.1 in) | 0.50 |
| General Wayne A Downing Intl A | United States | 185 km (115 mi) | 10.2 C (50.4 F) | 921.4 mm (36.3 in) | 0.54 |
| Chenoa | United States | 252 km (157 mi) | 10.4 C (50.7 F) | 889.1 mm (35.0 in) | 0.56 |
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).