Mason City Weather Records (USC00135230)
Record envelope, standing records and threshold days for Mason City (USC00135230), Iowa, United States, with 134 years of record.
Key Facts for Mason City
- Mason City (USC00135230) is a weather station in Iowa, United States at 43.16 latitude and -93.20 longitude, 337 m (1,105 ft) above sea level.
- The station reports from 1893 to 2026, 134 years of record.
- 1,464 records set at Mason City still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Mason City set a daily record high maximum temperature of 32.2 C (90.0 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, 43.16 latitude, -93.20 longitude.
- Elevation: 337 m (1,105 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 | 16.7 C (62.1 F) | -36.7 C (-34.1 F) | 9.4 C (48.9 F) | -28.3 C (-18.9 F) |
| Feb | 23.3 C (73.9 F) | -42.8 C (-45.0 F) | 16.7 C (62.1 F) | -18.3 C (-0.9 F) |
| Mar | 28.9 C (84.0 F) | -35.6 C (-32.1 F) | 28.3 C (82.9 F) | -16.1 C (3.0 F) |
| Apr | 35.0 C (95.0 F) | -15.0 C (5.0 F) | 28.9 C (84.0 F) | -5.0 C (23.0 F) |
| May | 40.0 C (104.0 F) | -5.0 C (23.0 F) | 32.2 C (90.0 F) | -0.6 C (30.9 F) |
| Jun | 40.0 C (104.0 F) | -0.6 C (30.9 F) | 33.3 C (91.9 F) | 9.4 C (48.9 F) |
| Jul | 41.7 C (107.1 F) | 3.3 C (37.9 F) | 34.4 C (93.9 F) | 13.3 C (55.9 F) |
| Aug | 39.4 C (102.9 F) | -1.1 C (30.0 F) | 30.6 C (87.1 F) | 11.7 C (53.1 F) |
| Sep | 39.4 C (102.9 F) | -9.4 C (15.1 F) | 32.8 C (91.0 F) | 8.3 C (46.9 F) |
| Oct | 34.4 C (93.9 F) | -20.0 C (-4.0 F) | 32.2 C (90.0 F) | 5.0 C (41.0 F) |
| Nov | 26.1 C (79.0 F) | -25.6 C (-14.1 F) | n/a | n/a |
| Dec | 20.0 C (68.0 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 | 4 |
| 1894 | 18 |
| 1895 | 19 |
| 1896 | 12 |
| 1897 | 17 |
| 1898 | 9 |
| 1899 | 23 |
| 1900 | 6 |
| 1903 | 7 |
| 1904 | 4 |
| 1905 | 10 |
| 1906 | 4 |
| 1907 | 7 |
| 1908 | 6 |
| 1909 | 16 |
| 1910 | 13 |
| 1911 | 18 |
| 1912 | 15 |
| 1913 | 15 |
| 1914 | 10 |
| 1915 | 9 |
| 1916 | 12 |
| 1917 | 15 |
| 1918 | 15 |
| 1919 | 10 |
| 1920 | 9 |
| 1921 | 3 |
| 1922 | 10 |
| 1923 | 17 |
| 1924 | 13 |
| 1925 | 30 |
| 1926 | 16 |
| 1927 | 13 |
| 1928 | 17 |
| 1929 | 15 |
| 1930 | 25 |
| 1931 | 22 |
| 1932 | 13 |
| 1933 | 13 |
| 1934 | 34 |
| 1935 | 12 |
| 1936 | 39 |
| 1937 | 14 |
| 1938 | 12 |
| 1939 | 15 |
| 1940 | 11 |
| 1941 | 10 |
| 1942 | 13 |
| 1943 | 9 |
| 1944 | 15 |
| 1945 | 13 |
| 1946 | 9 |
| 1947 | 17 |
| 1948 | 14 |
| 1949 | 8 |
| 1950 | 12 |
| 1951 | 10 |
| 1952 | 4 |
| 1953 | 9 |
| 1954 | 2 |
| 1955 | 13 |
| 1956 | 3 |
| 1957 | 1 |
| 1958 | 8 |
| 1959 | 13 |
| 1960 | 6 |
| 1961 | 4 |
| 1962 | 18 |
| 1963 | 15 |
| 1964 | 10 |
| 1965 | 14 |
| 1966 | 13 |
| 1967 | 14 |
| 1968 | 7 |
| 1969 | 7 |
| 1970 | 8 |
| 1971 | 9 |
| 1972 | 11 |
| 1973 | 8 |
| 1974 | 10 |
| 1975 | 3 |
| 1976 | 12 |
| 1977 | 16 |
| 1978 | 5 |
| 1979 | 7 |
| 1980 | 4 |
| 1981 | 14 |
| 1982 | 4 |
| 1983 | 18 |
| 1984 | 6 |
| 1985 | 15 |
| 1986 | 13 |
| 1987 | 18 |
| 1988 | 18 |
| 1989 | 10 |
| 1990 | 11 |
| 1991 | 21 |
| 1992 | 9 |
| 1993 | 4 |
| 1994 | 9 |
| 1995 | 6 |
| 1996 | 13 |
| 1997 | 9 |
| 1998 | 14 |
| 1999 | 6 |
| 2000 | 15 |
| 2001 | 9 |
| 2002 | 6 |
| 2003 | 8 |
| 2004 | 6 |
| 2005 | 8 |
| 2006 | 11 |
| 2007 | 5 |
| 2008 | 5 |
| 2009 | 7 |
| 2010 | 4 |
| 2011 | 11 |
| 2012 | 19 |
| 2013 | 4 |
| 2014 | 10 |
| 2015 | 6 |
| 2016 | 3 |
| 2017 | 9 |
| 2018 | 13 |
| 2019 | 8 |
| 2020 | 12 |
| 2021 | 7 |
| 2022 | 5 |
| 2023 | 5 |
| 2024 | 10 |
| 2025 | 4 |
| 2026 | 5 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1933-03-19 | Record daily snowfall | Record daily snowfall 38.1 cm (15.0 in) |
| 1936-07-05 | Record high maximum temperature | Record high maximum temperature 41.1 C (106.0 F) |
| 1936-07-14 | Record high maximum temperature | Record high maximum temperature 41.7 C (107.1 F) |
| 1988-06-21 | Record high minimum temperature | Record high minimum temperature 28.3 C (82.9 F) |
| 1996-02-02 | Record low minimum temperature | Record low minimum temperature -42.8 C (-45.0 F) |
Wettest Day of Each Month
Jun: 177.8 mm (7.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 45.7 mm (1.8 in) | 4 January 1922 |
| Feb | 39.1 mm (1.5 in) | 25 February 2007 |
| Mar | 61.0 mm (2.4 in) | 31 March 2006 |
| Apr | 76.2 mm (3.0 in) | 28 April 1975 |
| May | 124.0 mm (4.9 in) | 22 May 2004 |
| Jun | 177.8 mm (7.0 in) | 1 June 1900 |
| Jul | 108.0 mm (4.3 in) | 3 July 1907 |
| Aug | 158.8 mm (6.3 in) | 10 August 1980 |
| Sep | 132.1 mm (5.2 in) | 8 September 1964 |
| Oct | 59.9 mm (2.4 in) | 7 October 2017 |
| Nov | 69.3 mm (2.7 in) | 1 November 1991 |
| Dec | 38.1 mm (1.5 in) | 28 December 1982 |
Period of Record Coverage
1893 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1893 | 190 | 52% | No |
| 1894 | 256 | 70% | No |
| 1895 | 361 | 99% | Yes |
| 1896 | 358 | 98% | Yes |
| 1897 | 205 | 56% | No |
| 1898 | 357 | 98% | Yes |
| 1899 | 291 | 80% | No |
| 1900 | 156 | 43% | No |
| 1903 | 333 | 91% | Yes |
| 1904 | 364 | 99% | Yes |
| 1905 | 365 | 100% | Yes |
| 1906 | 364 | 100% | Yes |
| 1907 | 365 | 100% | Yes |
| 1908 | 366 | 100% | Yes |
| 1909 | 365 | 100% | Yes |
| 1910 | 365 | 100% | Yes |
| 1911 | 361 | 99% | Yes |
| 1912 | 365 | 100% | Yes |
| 1913 | 360 | 99% | Yes |
| 1914 | 364 | 100% | Yes |
| 1915 | 356 | 98% | Yes |
| 1916 | 364 | 99% | Yes |
| 1917 | 365 | 100% | Yes |
| 1918 | 301 | 82% | No |
| 1919 | 358 | 98% | Yes |
| 1920 | 333 | 91% | Yes |
| 1921 | 337 | 92% | Yes |
| 1922 | 359 | 98% | Yes |
| 1923 | 360 | 99% | Yes |
| 1924 | 365 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 361 | 99% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 365 | 100% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 364 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 365 | 100% | 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 | 364 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 363 | 99% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 364 | 99% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 363 | 99% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 203 | 56% | No |
| 1974 | 361 | 99% | Yes |
| 1975 | 180 | 49% | No |
| 1976 | 363 | 99% | Yes |
| 1977 | 330 | 90% | Yes |
| 1978 | 242 | 66% | No |
| 1979 | 362 | 99% | Yes |
| 1980 | 358 | 98% | Yes |
| 1981 | 363 | 99% | Yes |
| 1982 | 345 | 95% | Yes |
| 1983 | 362 | 99% | Yes |
| 1984 | 362 | 99% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 360 | 99% | Yes |
| 1987 | 361 | 99% | Yes |
| 1988 | 360 | 98% | Yes |
| 1989 | 363 | 99% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 364 | 100% | Yes |
| 1992 | 363 | 99% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 363 | 99% | Yes |
| 1995 | 363 | 99% | Yes |
| 1996 | 362 | 99% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 364 | 100% | Yes |
| 2000 | 365 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 361 | 99% | Yes |
| 2006 | 364 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 363 | 99% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 364 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 364 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 353 | 97% | Yes |
| 2026 | 275 | 75% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 13 October 2026 | Mason City, US | daily high max (Provisional) | 32.2 C (90.0 F) | 3.3 C (5.9 F) | 108 years | 45 of 100 (Notable) |
| 12 October 2026 | Mason City, US | daily high max (Provisional) | 32.2 C (90.0 F) | 1.1 C (2.0 F) | 69 years | 31 of 100 (Routine) |
| 11 October 2026 | Mason City, US | daily high max (Provisional) | 31.1 C (88.0 F) | 1.7 C (3.1 F) | 116 years | 42 of 100 (Notable) |
| 5 September 2026 | Mason City, US | daily high min (Tie, Provisional) | 21.1 C (70.0 F) | tie | 113 years | 10 of 100 (Routine) |
| 4 September 2026 | Mason City, US | daily high min (Provisional) | 21.1 C (70.0 F) | 0.5 C (0.9 F) | 84 years | 35 of 100 (Notable) |
| 9 July 2026 | Mason City, US | daily rain | 76.2 mm (3.0 in) | 6.3 mm (0.25 in) | 123 years | 44 of 100 (Notable) |
| 30 June 2026 | Mason City, US | daily high min | 25.6 C (78.1 F) | 2.3 C (4.1 F) | 56 years | 31 of 100 (Routine) |
| 31 March 2026 | Mason City, US | daily high max | 28.3 C (82.9 F) | 1.1 C (2.0 F) | 40 years | 23 of 100 (Routine) |
| 22 March 2026 | Mason City, US | daily high max | 28.3 C (82.9 F) | 5.5 C (9.9 F) | 4 years | 18 of 100 (Routine) |
| 17 March 2026 | Mason City, US | daily low max (Tie) | -9.4 C (15.1 F) | tie | 84 years | 8 of 100 (Routine) |
| 16 March 2026 | Mason City, US | daily snowfall (Tie) | 7.6 cm (3.0 in) | tie | 65 years | 7 of 100 (Routine) |
| 28 February 2026 | Mason City, US | daily high max | 16.7 C (62.1 F) | 1.7 C (3.1 F) | 10 years | 15 of 100 (Routine) |
| 15 February 2026 | Mason City, US | daily high max | 13.9 C (57.0 F) | 2.8 C (5.0 F) | 95 years | 42 of 100 (Notable) |
| 25 November 2025 | Mason City, US | daily high min | 5.6 C (42.1 F) | 2.8 C (5.0 F) | 16 years | 18 of 100 (Routine) |
| 15 November 2025 | Mason City, US | daily high max (Tie) | 20.6 C (69.1 F) | tie | 35 years | 5 of 100 (Routine) |
| 24 July 2025 | Mason City, US | daily rain | 53.3 mm (2.1 in) | 1.2 mm (0.05 in) | 39 years | 21 of 100 (Routine) |
| 23 June 2025 | Mason City, US | daily high min | 25.0 C (77.0 F) | 2.8 C (5.0 F) | 102 years | 46 of 100 (Notable) |
| 22 June 2025 | Mason City, US | daily high min (Tie) | 25.0 C (77.0 F) | tie | 36 years | 5 of 100 (Routine) |
| 21 May 2025 | Mason City, US | daily low max (Tie) | 10.6 C (51.1 F) | tie | 110 years | 10 of 100 (Routine) |
| 29 March 2025 | Mason City, US | daily high max (Tie) | 28.3 C (82.9 F) | tie | 129 years | 10 of 100 (Routine) |
Climate Trend
114 complete years, 1898 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1898 | 7.1 C | -0.52 C |
| 1904 | 7.1 C | -0.47 C |
| 1905 | 7.6 C | -0.01 C |
| 1906 | 8.6 C | +0.96 C |
| 1907 | 7.5 C | -0.10 C |
| 1908 | 8.0 C | +0.41 C |
| 1909 | 6.6 C | -0.96 C |
| 1910 | 7.4 C | -0.17 C |
| 1911 | 7.9 C | +0.27 C |
| 1912 | 6.3 C | -1.27 C |
| 1913 | 8.4 C | +0.82 C |
| 1914 | 7.8 C | +0.18 C |
| 1915 | 7.0 C | -0.60 C |
| 1916 | 6.8 C | -0.76 C |
| 1917 | 6.0 C | -1.56 C |
| 1919 | 7.7 C | +0.11 C |
| 1922 | 8.3 C | +0.73 C |
| 1923 | 8.0 C | +0.36 C |
| 1924 | 6.3 C | -1.35 C |
| 1925 | 7.6 C | -0.03 C |
| 1926 | 7.2 C | -0.43 C |
| 1927 | 7.5 C | -0.07 C |
| 1929 | 6.1 C | -1.55 C |
| 1930 | 7.9 C | +0.31 C |
| 1931 | 10.2 C | +2.60 C |
| 1932 | 6.8 C | -0.77 C |
| 1933 | 8.6 C | +0.98 C |
| 1934 | 9.0 C | +1.36 C |
| 1935 | 7.4 C | -0.25 C |
| 1936 | 7.0 C | -0.65 C |
| 1937 | 6.7 C | -0.86 C |
| 1938 | 8.7 C | +1.14 C |
| 1939 | 8.9 C | +1.29 C |
| 1940 | 7.2 C | -0.41 C |
| 1941 | 8.9 C | +1.34 C |
| 1942 | 7.7 C | +0.09 C |
| 1943 | 6.7 C | -0.87 C |
| 1944 | 8.2 C | +0.62 C |
| 1945 | 6.9 C | -0.75 C |
| 1946 | 8.5 C | +0.94 C |
| 1947 | 7.6 C | +0.04 C |
| 1948 | 8.1 C | +0.46 C |
| 1949 | 8.3 C | +0.69 C |
| 1950 | 6.0 C | -1.57 C |
| 1951 | 5.7 C | -1.87 C |
| 1952 | 7.8 C | +0.16 C |
| 1953 | 8.3 C | +0.73 C |
| 1954 | 8.4 C | +0.76 C |
| 1955 | 8.0 C | +0.42 C |
| 1956 | 7.5 C | -0.12 C |
| 1957 | 7.8 C | +0.20 C |
| 1958 | 7.6 C | +0.00 C |
| 1959 | 7.3 C | -0.33 C |
| 1960 | 7.3 C | -0.31 C |
| 1961 | 7.4 C | -0.25 C |
| 1962 | 7.1 C | -0.54 C |
| 1963 | 8.0 C | +0.37 C |
| 1964 | 8.5 C | +0.94 C |
| 1965 | 7.0 C | -0.56 C |
| 1966 | 7.0 C | -0.63 C |
| 1967 | 7.1 C | -0.48 C |
| 1968 | 7.9 C | +0.25 C |
| 1969 | 6.7 C | -0.88 C |
| 1970 | 7.2 C | -0.42 C |
| 1971 | 7.5 C | -0.06 C |
| 1972 | 6.5 C | -1.13 C |
| 1974 | 8.3 C | +0.68 C |
| 1976 | 8.0 C | +0.36 C |
| 1979 | 6.6 C | -1.00 C |
| 1980 | 8.0 C | +0.40 C |
| 1981 | 8.8 C | +1.22 C |
| 1982 | 7.0 C | -0.61 C |
| 1983 | 7.5 C | -0.06 C |
| 1984 | 7.9 C | +0.33 C |
| 1985 | 7.0 C | -0.60 C |
| 1986 | 8.2 C | +0.63 C |
| 1987 | 10.5 C | +2.90 C |
| 1988 | 8.3 C | +0.65 C |
| 1989 | 6.5 C | -1.14 C |
| 1990 | 7.9 C | +0.32 C |
| 1991 | 7.2 C | -0.40 C |
| 1992 | 6.9 C | -0.66 C |
| 1993 | 5.5 C | -2.06 C |
| 1994 | 6.7 C | -0.93 C |
| 1995 | 6.8 C | -0.85 C |
| 1996 | 5.3 C | -2.29 C |
| 1997 | 6.7 C | -0.94 C |
| 1998 | 9.1 C | +1.47 C |
| 1999 | 8.4 C | +0.78 C |
| 2000 | 7.6 C | +0.03 C |
| 2001 | 7.7 C | +0.14 C |
| 2002 | 8.0 C | +0.38 C |
| 2003 | 7.2 C | -0.41 C |
| 2004 | 7.6 C | -0.03 C |
| 2005 | 8.3 C | +0.67 C |
| 2006 | 8.6 C | +1.01 C |
| 2007 | 7.6 C | -0.01 C |
| 2008 | 6.2 C | -1.36 C |
| 2009 | 6.5 C | -1.06 C |
| 2010 | 7.5 C | -0.06 C |
| 2011 | 7.5 C | -0.07 C |
| 2012 | 9.8 C | +2.20 C |
| 2013 | 6.4 C | -1.17 C |
| 2014 | 5.7 C | -1.95 C |
| 2016 | 9.0 C | +1.36 C |
| 2017 | 8.6 C | +0.98 C |
| 2018 | 7.2 C | -0.44 C |
| 2019 | 6.9 C | -0.74 C |
| 2020 | 8.3 C | +0.69 C |
| 2021 | 9.0 C | +1.40 C |
| 2022 | 7.1 C | -0.50 C |
| 2023 | 9.0 C | +1.44 C |
| 2024 | 9.6 C | +2.04 C |
| 2025 | 8.5 C | +0.90 C |
The fitted trend in annual mean temperature here over 1898 to 2025 is 0.02 C (-0.03 to 0.07) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.04 F (-0.05 to 0.13) per decade. The slope is a straight line fitted to 114 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.02 C (-0.03 to 0.07) per decade | 0.04 F (-0.05 to 0.13) per decade | 1898 to 2025 | 114 | Not clearly different from zero |
| Mean daily maximum | 0.01 C (-0.05 to 0.07) per decade | 0.02 F (-0.09 to 0.12) per decade | 1898 to 2025 | 114 | Not clearly different from zero |
| Mean daily minimum | 0.03 C (-0.01 to 0.08) per decade | 0.06 F (-0.03 to 0.15) per decade | 1898 to 2025 | 114 | 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) | 41.7 C (107.1 F) | 1936 | 35.6 C (96.1 F) | 132 |
| Coldest night (TNn) | -42.8 C (-45.0 F) | 1996 | -28.9 C (-20.0 F) | 132 |
| Wettest day (Rx1day) | 177.8 mm (7.0 in) | 1900 | 62.9 mm (2.5 in) | 132 |
| Wettest five days (Rx5day) | 249.7 mm (9.8 in) | 1954 | 100.6 mm (4.0 in) | 132 |
| Longest dry spell (CDD) | 56 days | 1996 | 26 days | 132 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1893 | 36.7 C (98.1 F) |
| 1894 | 39.4 C (102.9 F) |
| 1895 | 35.0 C (95.0 F) |
| 1896 | 34.4 C (93.9 F) |
| 1897 | 36.7 C (98.1 F) |
| 1898 | 35.0 C (95.0 F) |
| 1899 | 36.1 C (97.0 F) |
| 1900 | 32.2 C (90.0 F) |
| 1902 | n/a |
| 1903 | 33.9 C (93.0 F) |
| 1904 | 35.6 C (96.1 F) |
| 1905 | 36.7 C (98.1 F) |
| 1906 | 33.9 C (93.0 F) |
| 1907 | 33.3 C (91.9 F) |
| 1908 | 34.4 C (93.9 F) |
| 1909 | 33.9 C (93.0 F) |
| 1910 | 35.0 C (95.0 F) |
| 1911 | 40.0 C (104.0 F) |
| 1912 | 34.4 C (93.9 F) |
| 1913 | 37.8 C (100.0 F) |
| 1914 | 37.2 C (99.0 F) |
| 1915 | 33.3 C (91.9 F) |
| 1916 | 37.8 C (100.0 F) |
| 1917 | 37.2 C (99.0 F) |
| 1918 | 36.1 C (97.0 F) |
| 1919 | 37.8 C (100.0 F) |
| 1920 | 36.7 C (98.1 F) |
| 1921 | 37.2 C (99.0 F) |
| 1922 | 39.4 C (102.9 F) |
| 1923 | 36.7 C (98.1 F) |
| 1924 | 34.4 C (93.9 F) |
| 1925 | 37.8 C (100.0 F) |
| 1926 | 40.0 C (104.0 F) |
| 1927 | 36.7 C (98.1 F) |
| 1928 | 33.3 C (91.9 F) |
| 1929 | 35.0 C (95.0 F) |
| 1930 | 39.4 C (102.9 F) |
| 1931 | 38.9 C (102.0 F) |
| 1932 | 35.6 C (96.1 F) |
| 1933 | 38.3 C (100.9 F) |
| 1934 | 40.0 C (104.0 F) |
| 1935 | 35.0 C (95.0 F) |
| 1936 | 41.7 C (107.1 F) |
| 1937 | 38.3 C (100.9 F) |
| 1938 | 35.6 C (96.1 F) |
| 1939 | 36.7 C (98.1 F) |
| 1940 | 40.0 C (104.0 F) |
| 1941 | 37.2 C (99.0 F) |
| 1942 | 34.4 C (93.9 F) |
| 1943 | 35.0 C (95.0 F) |
| 1944 | 36.7 C (98.1 F) |
| 1945 | 34.4 C (93.9 F) |
| 1946 | 36.7 C (98.1 F) |
| 1947 | 38.3 C (100.9 F) |
| 1948 | 38.9 C (102.0 F) |
| 1949 | 35.0 C (95.0 F) |
| 1950 | 33.3 C (91.9 F) |
| 1951 | 32.8 C (91.0 F) |
| 1952 | 34.4 C (93.9 F) |
| 1953 | 37.2 C (99.0 F) |
| 1954 | 35.0 C (95.0 F) |
| 1955 | 38.9 C (102.0 F) |
| 1956 | 35.6 C (96.1 F) |
| 1957 | 35.6 C (96.1 F) |
| 1958 | 34.4 C (93.9 F) |
| 1959 | 35.6 C (96.1 F) |
| 1960 | 34.4 C (93.9 F) |
| 1961 | 35.0 C (95.0 F) |
| 1962 | 32.2 C (90.0 F) |
| 1963 | 36.7 C (98.1 F) |
| 1964 | 35.6 C (96.1 F) |
| 1965 | 37.8 C (100.0 F) |
| 1966 | 35.0 C (95.0 F) |
| 1967 | 32.8 C (91.0 F) |
| 1968 | 36.7 C (98.1 F) |
| 1969 | 34.4 C (93.9 F) |
| 1970 | 36.7 C (98.1 F) |
| 1971 | 35.0 C (95.0 F) |
| 1972 | 35.6 C (96.1 F) |
| 1973 | 33.9 C (93.0 F) |
| 1974 | 36.7 C (98.1 F) |
| 1975 | 33.9 C (93.0 F) |
| 1976 | 37.2 C (99.0 F) |
| 1977 | 37.8 C (100.0 F) |
| 1978 | 37.2 C (99.0 F) |
| 1979 | 34.4 C (93.9 F) |
| 1980 | 39.4 C (102.9 F) |
| 1981 | 34.4 C (93.9 F) |
| 1982 | 35.6 C (96.1 F) |
| 1983 | 37.2 C (99.0 F) |
| 1984 | 36.7 C (98.1 F) |
| 1985 | 38.9 C (102.0 F) |
| 1986 | 35.0 C (95.0 F) |
| 1987 | 37.2 C (99.0 F) |
| 1988 | 38.9 C (102.0 F) |
| 1989 | 36.1 C (97.0 F) |
| 1990 | 37.8 C (100.0 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 31.7 C (89.1 F) |
| 1994 | 32.8 C (91.0 F) |
| 1995 | 37.8 C (100.0 F) |
| 1996 | 33.9 C (93.0 F) |
| 1997 | 33.9 C (93.0 F) |
| 1998 | 33.3 C (91.9 F) |
| 1999 | 35.6 C (96.1 F) |
| 2000 | 34.4 C (93.9 F) |
| 2001 | 35.0 C (95.0 F) |
| 2002 | 35.0 C (95.0 F) |
| 2003 | 34.4 C (93.9 F) |
| 2004 | 32.2 C (90.0 F) |
| 2005 | 34.4 C (93.9 F) |
| 2006 | 35.6 C (96.1 F) |
| 2007 | 35.6 C (96.1 F) |
| 2008 | 32.2 C (90.0 F) |
| 2009 | 33.9 C (93.0 F) |
| 2010 | 34.4 C (93.9 F) |
| 2011 | 36.1 C (97.0 F) |
| 2012 | 36.7 C (98.1 F) |
| 2013 | 37.2 C (99.0 F) |
| 2014 | 31.7 C (89.1 F) |
| 2015 | 33.9 C (93.0 F) |
| 2016 | 35.6 C (96.1 F) |
| 2017 | 35.0 C (95.0 F) |
| 2018 | 36.1 C (97.0 F) |
| 2019 | 35.0 C (95.0 F) |
| 2020 | 36.7 C (98.1 F) |
| 2021 | 38.3 C (100.9 F) |
| 2022 | 35.0 C (95.0 F) |
| 2023 | 37.8 C (100.0 F) |
| 2024 | 34.4 C (93.9 F) |
| 2025 | 33.9 C (93.0 F) |
| 2026 | 34.4 C (93.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1893 | -18.9 C (-2.0 F) |
| 1894 | -23.9 C (-11.0 F) |
| 1895 | -31.7 C (-25.1 F) |
| 1896 | -22.2 C (-8.0 F) |
| 1897 | -28.9 C (-20.0 F) |
| 1898 | -26.1 C (-15.0 F) |
| 1899 | -37.2 C (-35.0 F) |
| 1900 | -30.0 C (-22.0 F) |
| 1902 | n/a |
| 1903 | -28.3 C (-18.9 F) |
| 1904 | -32.2 C (-26.0 F) |
| 1905 | -32.8 C (-27.0 F) |
| 1906 | -25.0 C (-13.0 F) |
| 1907 | -27.8 C (-18.0 F) |
| 1908 | -25.6 C (-14.1 F) |
| 1909 | -30.0 C (-22.0 F) |
| 1910 | -32.2 C (-26.0 F) |
| 1911 | -32.2 C (-26.0 F) |
| 1912 | -36.1 C (-33.0 F) |
| 1913 | -28.9 C (-20.0 F) |
| 1914 | -32.2 C (-26.0 F) |
| 1915 | -33.3 C (-27.9 F) |
| 1916 | -32.2 C (-26.0 F) |
| 1917 | -32.2 C (-26.0 F) |
| 1918 | -33.9 C (-29.0 F) |
| 1919 | -35.0 C (-31.0 F) |
| 1920 | -27.8 C (-18.0 F) |
| 1921 | -27.8 C (-18.0 F) |
| 1922 | -33.9 C (-29.0 F) |
| 1923 | -30.0 C (-22.0 F) |
| 1924 | -35.0 C (-31.0 F) |
| 1925 | -26.1 C (-15.0 F) |
| 1926 | -27.2 C (-17.0 F) |
| 1927 | -26.7 C (-16.1 F) |
| 1928 | -28.3 C (-18.9 F) |
| 1929 | -34.4 C (-29.9 F) |
| 1930 | -35.0 C (-31.0 F) |
| 1931 | -22.8 C (-9.0 F) |
| 1932 | -29.4 C (-20.9 F) |
| 1933 | -31.7 C (-25.1 F) |
| 1934 | -27.2 C (-17.0 F) |
| 1935 | -33.9 C (-29.0 F) |
| 1936 | -34.4 C (-29.9 F) |
| 1937 | -34.4 C (-29.9 F) |
| 1938 | -26.7 C (-16.1 F) |
| 1939 | -28.3 C (-18.9 F) |
| 1940 | -30.6 C (-23.1 F) |
| 1941 | -26.1 C (-15.0 F) |
| 1942 | -32.2 C (-26.0 F) |
| 1943 | -32.2 C (-26.0 F) |
| 1944 | -27.2 C (-17.0 F) |
| 1945 | -27.8 C (-18.0 F) |
| 1946 | -28.9 C (-20.0 F) |
| 1947 | -27.2 C (-17.0 F) |
| 1948 | -30.6 C (-23.1 F) |
| 1949 | -31.1 C (-24.0 F) |
| 1950 | -32.2 C (-26.0 F) |
| 1951 | -33.3 C (-27.9 F) |
| 1952 | -28.3 C (-18.9 F) |
| 1953 | -26.1 C (-15.0 F) |
| 1954 | -28.9 C (-20.0 F) |
| 1955 | -28.9 C (-20.0 F) |
| 1956 | -32.2 C (-26.0 F) |
| 1957 | -26.7 C (-16.1 F) |
| 1958 | -29.4 C (-20.9 F) |
| 1959 | -30.6 C (-23.1 F) |
| 1960 | -27.8 C (-18.0 F) |
| 1961 | -27.8 C (-18.0 F) |
| 1962 | -35.6 C (-32.1 F) |
| 1963 | -34.4 C (-29.9 F) |
| 1964 | -24.4 C (-11.9 F) |
| 1965 | -32.2 C (-26.0 F) |
| 1966 | -33.3 C (-27.9 F) |
| 1967 | -33.3 C (-27.9 F) |
| 1968 | -27.8 C (-18.0 F) |
| 1969 | -27.2 C (-17.0 F) |
| 1970 | -33.9 C (-29.0 F) |
| 1971 | -31.1 C (-24.0 F) |
| 1972 | -31.7 C (-25.1 F) |
| 1973 | -29.4 C (-20.9 F) |
| 1974 | -33.3 C (-27.9 F) |
| 1975 | -27.8 C (-18.0 F) |
| 1976 | -30.6 C (-23.1 F) |
| 1977 | -32.8 C (-27.0 F) |
| 1978 | -26.1 C (-15.0 F) |
| 1979 | -32.2 C (-26.0 F) |
| 1980 | -25.6 C (-14.1 F) |
| 1981 | -27.8 C (-18.0 F) |
| 1982 | -33.3 C (-27.9 F) |
| 1983 | -32.2 C (-26.0 F) |
| 1984 | -30.6 C (-23.1 F) |
| 1985 | -32.2 C (-26.0 F) |
| 1986 | -29.4 C (-20.9 F) |
| 1987 | -23.9 C (-11.0 F) |
| 1988 | -33.3 C (-27.9 F) |
| 1989 | -30.6 C (-23.1 F) |
| 1990 | -30.6 C (-23.1 F) |
| 1991 | -28.3 C (-18.9 F) |
| 1992 | -25.0 C (-13.0 F) |
| 1993 | -28.3 C (-18.9 F) |
| 1994 | -36.1 C (-33.0 F) |
| 1995 | -24.4 C (-11.9 F) |
| 1996 | -42.8 C (-45.0 F) |
| 1997 | -26.7 C (-16.1 F) |
| 1998 | -23.3 C (-9.9 F) |
| 1999 | -27.2 C (-17.0 F) |
| 2000 | -31.1 C (-24.0 F) |
| 2001 | -25.6 C (-14.1 F) |
| 2002 | -21.1 C (-6.0 F) |
| 2003 | -25.6 C (-14.1 F) |
| 2004 | -27.8 C (-18.0 F) |
| 2005 | -27.2 C (-17.0 F) |
| 2006 | -26.7 C (-16.1 F) |
| 2007 | -25.6 C (-14.1 F) |
| 2008 | -26.7 C (-16.1 F) |
| 2009 | -33.3 C (-27.9 F) |
| 2010 | -29.4 C (-20.9 F) |
| 2011 | -29.4 C (-20.9 F) |
| 2012 | -25.6 C (-14.1 F) |
| 2013 | -25.0 C (-13.0 F) |
| 2014 | -29.4 C (-20.9 F) |
| 2015 | -27.2 C (-17.0 F) |
| 2016 | -29.4 C (-20.9 F) |
| 2017 | -23.9 C (-11.0 F) |
| 2018 | -27.8 C (-18.0 F) |
| 2019 | -35.0 C (-31.0 F) |
| 2020 | -26.7 C (-16.1 F) |
| 2021 | -28.9 C (-20.0 F) |
| 2022 | -28.3 C (-18.9 F) |
| 2023 | -25.0 C (-13.0 F) |
| 2024 | -25.6 C (-14.1 F) |
| 2025 | -27.2 C (-17.0 F) |
| 2026 | -28.3 C (-18.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1893 | 76.2 mm (3.0 in) |
| 1894 | 39.9 mm (1.6 in) |
| 1895 | 45.7 mm (1.8 in) |
| 1896 | 101.6 mm (4.0 in) |
| 1897 | 35.6 mm (1.4 in) |
| 1898 | 63.5 mm (2.5 in) |
| 1899 | 132.1 mm (5.2 in) |
| 1900 | 177.8 mm (7.0 in) |
| 1902 | n/a |
| 1903 | 71.1 mm (2.8 in) |
| 1904 | 53.3 mm (2.1 in) |
| 1905 | 64.8 mm (2.6 in) |
| 1906 | 67.3 mm (2.6 in) |
| 1907 | 108.0 mm (4.3 in) |
| 1908 | 78.7 mm (3.1 in) |
| 1909 | 59.2 mm (2.3 in) |
| 1910 | 63.0 mm (2.5 in) |
| 1911 | 42.7 mm (1.7 in) |
| 1912 | 51.8 mm (2.0 in) |
| 1913 | 58.7 mm (2.3 in) |
| 1914 | 57.7 mm (2.3 in) |
| 1915 | 50.8 mm (2.0 in) |
| 1916 | 63.8 mm (2.5 in) |
| 1917 | 47.8 mm (1.9 in) |
| 1918 | 49.5 mm (1.9 in) |
| 1919 | 78.0 mm (3.1 in) |
| 1920 | 40.6 mm (1.6 in) |
| 1921 | 45.5 mm (1.8 in) |
| 1922 | 45.7 mm (1.8 in) |
| 1923 | 44.5 mm (1.8 in) |
| 1924 | 46.7 mm (1.8 in) |
| 1925 | 86.9 mm (3.4 in) |
| 1926 | 96.5 mm (3.8 in) |
| 1927 | 50.8 mm (2.0 in) |
| 1928 | 98.0 mm (3.9 in) |
| 1929 | 41.7 mm (1.6 in) |
| 1930 | 110.5 mm (4.4 in) |
| 1931 | 53.6 mm (2.1 in) |
| 1932 | 46.0 mm (1.8 in) |
| 1933 | 38.9 mm (1.5 in) |
| 1934 | 40.9 mm (1.6 in) |
| 1935 | 64.8 mm (2.6 in) |
| 1936 | 72.6 mm (2.9 in) |
| 1937 | 61.5 mm (2.4 in) |
| 1938 | 58.2 mm (2.3 in) |
| 1939 | 43.9 mm (1.7 in) |
| 1940 | 66.0 mm (2.6 in) |
| 1941 | 91.4 mm (3.6 in) |
| 1942 | 64.0 mm (2.5 in) |
| 1943 | 49.0 mm (1.9 in) |
| 1944 | 115.1 mm (4.5 in) |
| 1945 | 49.3 mm (1.9 in) |
| 1946 | 49.0 mm (1.9 in) |
| 1947 | 58.4 mm (2.3 in) |
| 1948 | 32.8 mm (1.3 in) |
| 1949 | 65.3 mm (2.6 in) |
| 1950 | 52.3 mm (2.1 in) |
| 1951 | 55.4 mm (2.2 in) |
| 1952 | 75.9 mm (3.0 in) |
| 1953 | 70.1 mm (2.8 in) |
| 1954 | 120.9 mm (4.8 in) |
| 1955 | 80.3 mm (3.2 in) |
| 1956 | 72.6 mm (2.9 in) |
| 1957 | 39.9 mm (1.6 in) |
| 1958 | 86.4 mm (3.4 in) |
| 1959 | 88.4 mm (3.5 in) |
| 1960 | 74.9 mm (2.9 in) |
| 1961 | 50.8 mm (2.0 in) |
| 1962 | 107.4 mm (4.2 in) |
| 1963 | 99.6 mm (3.9 in) |
| 1964 | 132.1 mm (5.2 in) |
| 1965 | 63.5 mm (2.5 in) |
| 1966 | 81.3 mm (3.2 in) |
| 1967 | 90.7 mm (3.6 in) |
| 1968 | 69.1 mm (2.7 in) |
| 1969 | 56.6 mm (2.2 in) |
| 1970 | 68.6 mm (2.7 in) |
| 1971 | 83.8 mm (3.3 in) |
| 1972 | 55.9 mm (2.2 in) |
| 1973 | 44.7 mm (1.8 in) |
| 1974 | 47.5 mm (1.9 in) |
| 1975 | 76.2 mm (3.0 in) |
| 1976 | 49.3 mm (1.9 in) |
| 1977 | 46.5 mm (1.8 in) |
| 1978 | 88.9 mm (3.5 in) |
| 1979 | 67.3 mm (2.6 in) |
| 1980 | 158.8 mm (6.3 in) |
| 1981 | 97.3 mm (3.8 in) |
| 1982 | 82.0 mm (3.2 in) |
| 1983 | 127.5 mm (5.0 in) |
| 1984 | 110.2 mm (4.3 in) |
| 1985 | 91.9 mm (3.6 in) |
| 1986 | 52.6 mm (2.1 in) |
| 1987 | 33.3 mm (1.3 in) |
| 1988 | 60.2 mm (2.4 in) |
| 1989 | 27.7 mm (1.1 in) |
| 1990 | 101.6 mm (4.0 in) |
| 1991 | 69.3 mm (2.7 in) |
| 1992 | 81.5 mm (3.2 in) |
| 1993 | 58.4 mm (2.3 in) |
| 1994 | 47.8 mm (1.9 in) |
| 1995 | 111.8 mm (4.4 in) |
| 1996 | 39.4 mm (1.6 in) |
| 1997 | 59.7 mm (2.4 in) |
| 1998 | 46.2 mm (1.8 in) |
| 1999 | 98.6 mm (3.9 in) |
| 2000 | 54.6 mm (2.1 in) |
| 2001 | 41.9 mm (1.6 in) |
| 2002 | 52.1 mm (2.1 in) |
| 2003 | 68.1 mm (2.7 in) |
| 2004 | 124.0 mm (4.9 in) |
| 2005 | 73.7 mm (2.9 in) |
| 2006 | 61.0 mm (2.4 in) |
| 2007 | 114.3 mm (4.5 in) |
| 2008 | 88.1 mm (3.5 in) |
| 2009 | 65.5 mm (2.6 in) |
| 2010 | 52.1 mm (2.1 in) |
| 2011 | 50.8 mm (2.0 in) |
| 2012 | 45.7 mm (1.8 in) |
| 2013 | 62.7 mm (2.5 in) |
| 2014 | 54.6 mm (2.1 in) |
| 2015 | 56.9 mm (2.2 in) |
| 2016 | 77.0 mm (3.0 in) |
| 2017 | 59.9 mm (2.4 in) |
| 2018 | 80.8 mm (3.2 in) |
| 2019 | 59.2 mm (2.3 in) |
| 2020 | 57.2 mm (2.3 in) |
| 2021 | 62.7 mm (2.5 in) |
| 2022 | 93.5 mm (3.7 in) |
| 2023 | 91.4 mm (3.6 in) |
| 2024 | 47.5 mm (1.9 in) |
| 2025 | 53.8 mm (2.1 in) |
| 2026 | 76.2 mm (3.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1893 | 111.8 mm (4.4 in) |
| 1894 | 51.3 mm (2.0 in) |
| 1895 | 66.8 mm (2.6 in) |
| 1896 | 126.7 mm (5.0 in) |
| 1897 | 60.0 mm (2.4 in) |
| 1898 | 74.9 mm (2.9 in) |
| 1899 | 170.2 mm (6.7 in) |
| 1900 | 177.8 mm (7.0 in) |
| 1902 | n/a |
| 1903 | 91.4 mm (3.6 in) |
| 1904 | 85.1 mm (3.4 in) |
| 1905 | 119.7 mm (4.7 in) |
| 1906 | 104.1 mm (4.1 in) |
| 1907 | 162.8 mm (6.4 in) |
| 1908 | 107.4 mm (4.2 in) |
| 1909 | 98.8 mm (3.9 in) |
| 1910 | 69.4 mm (2.7 in) |
| 1911 | 72.4 mm (2.9 in) |
| 1912 | 76.9 mm (3.0 in) |
| 1913 | 64.3 mm (2.5 in) |
| 1914 | 89.0 mm (3.5 in) |
| 1915 | 96.1 mm (3.8 in) |
| 1916 | 75.2 mm (3.0 in) |
| 1917 | 54.2 mm (2.1 in) |
| 1918 | 107.4 mm (4.2 in) |
| 1919 | 95.5 mm (3.8 in) |
| 1920 | 62.3 mm (2.5 in) |
| 1921 | 99.8 mm (3.9 in) |
| 1922 | 77.8 mm (3.1 in) |
| 1923 | 93.0 mm (3.7 in) |
| 1924 | 77.5 mm (3.1 in) |
| 1925 | 107.5 mm (4.2 in) |
| 1926 | 121.4 mm (4.8 in) |
| 1927 | 63.8 mm (2.5 in) |
| 1928 | 134.1 mm (5.3 in) |
| 1929 | 84.6 mm (3.3 in) |
| 1930 | 116.9 mm (4.6 in) |
| 1931 | 98.2 mm (3.9 in) |
| 1932 | 59.6 mm (2.3 in) |
| 1933 | 69.1 mm (2.7 in) |
| 1934 | 82.6 mm (3.3 in) |
| 1935 | 82.3 mm (3.2 in) |
| 1936 | 111.5 mm (4.4 in) |
| 1937 | 88.2 mm (3.5 in) |
| 1938 | 124.1 mm (4.9 in) |
| 1939 | 103.4 mm (4.1 in) |
| 1940 | 120.6 mm (4.7 in) |
| 1941 | 148.3 mm (5.8 in) |
| 1942 | 96.8 mm (3.8 in) |
| 1943 | 70.8 mm (2.8 in) |
| 1944 | 158.6 mm (6.2 in) |
| 1945 | 73.6 mm (2.9 in) |
| 1946 | 126.9 mm (5.0 in) |
| 1947 | 64.8 mm (2.6 in) |
| 1948 | 48.3 mm (1.9 in) |
| 1949 | 102.6 mm (4.0 in) |
| 1950 | 109.2 mm (4.3 in) |
| 1951 | 120.9 mm (4.8 in) |
| 1952 | 77.7 mm (3.1 in) |
| 1953 | 106.4 mm (4.2 in) |
| 1954 | 249.7 mm (9.8 in) |
| 1955 | 117.1 mm (4.6 in) |
| 1956 | 106.6 mm (4.2 in) |
| 1957 | 59.2 mm (2.3 in) |
| 1958 | 97.1 mm (3.8 in) |
| 1959 | 115.8 mm (4.6 in) |
| 1960 | 87.9 mm (3.5 in) |
| 1961 | 76.7 mm (3.0 in) |
| 1962 | 143.7 mm (5.7 in) |
| 1963 | 120.8 mm (4.8 in) |
| 1964 | 155.8 mm (6.1 in) |
| 1965 | 130.6 mm (5.1 in) |
| 1966 | 126.3 mm (5.0 in) |
| 1967 | 103.4 mm (4.1 in) |
| 1968 | 141.7 mm (5.6 in) |
| 1969 | 151.5 mm (6.0 in) |
| 1970 | 86.9 mm (3.4 in) |
| 1971 | 95.0 mm (3.7 in) |
| 1972 | 116.8 mm (4.6 in) |
| 1973 | 102.1 mm (4.0 in) |
| 1974 | 78.6 mm (3.1 in) |
| 1975 | 89.4 mm (3.5 in) |
| 1976 | 58.9 mm (2.3 in) |
| 1977 | 68.3 mm (2.7 in) |
| 1978 | 107.0 mm (4.2 in) |
| 1979 | 121.9 mm (4.8 in) |
| 1980 | 230.2 mm (9.1 in) |
| 1981 | 147.8 mm (5.8 in) |
| 1982 | 102.8 mm (4.0 in) |
| 1983 | 177.9 mm (7.0 in) |
| 1984 | 139.1 mm (5.5 in) |
| 1985 | 105.4 mm (4.1 in) |
| 1986 | 90.9 mm (3.6 in) |
| 1987 | 59.0 mm (2.3 in) |
| 1988 | 103.4 mm (4.1 in) |
| 1989 | 41.8 mm (1.6 in) |
| 1990 | 171.0 mm (6.7 in) |
| 1991 | 126.7 mm (5.0 in) |
| 1992 | 85.8 mm (3.4 in) |
| 1993 | 105.6 mm (4.2 in) |
| 1994 | 129.5 mm (5.1 in) |
| 1995 | 120.4 mm (4.7 in) |
| 1996 | 62.8 mm (2.5 in) |
| 1997 | 80.5 mm (3.2 in) |
| 1998 | 70.1 mm (2.8 in) |
| 1999 | 219.8 mm (8.7 in) |
| 2000 | 108.2 mm (4.3 in) |
| 2001 | 96.2 mm (3.8 in) |
| 2002 | 87.2 mm (3.4 in) |
| 2003 | 96.0 mm (3.8 in) |
| 2004 | 190.8 mm (7.5 in) |
| 2005 | 112.8 mm (4.4 in) |
| 2006 | 97.6 mm (3.8 in) |
| 2007 | 195.9 mm (7.7 in) |
| 2008 | 165.1 mm (6.5 in) |
| 2009 | 80.1 mm (3.2 in) |
| 2010 | 65.2 mm (2.6 in) |
| 2011 | 61.5 mm (2.4 in) |
| 2012 | 65.8 mm (2.6 in) |
| 2013 | 112.3 mm (4.4 in) |
| 2014 | 113.6 mm (4.5 in) |
| 2015 | 73.3 mm (2.9 in) |
| 2016 | 118.7 mm (4.7 in) |
| 2017 | 108.7 mm (4.3 in) |
| 2018 | 185.0 mm (7.3 in) |
| 2019 | 111.3 mm (4.4 in) |
| 2020 | 93.0 mm (3.7 in) |
| 2021 | 136.3 mm (5.4 in) |
| 2022 | 101.4 mm (4.0 in) |
| 2023 | 99.6 mm (3.9 in) |
| 2024 | 86.6 mm (3.4 in) |
| 2025 | 96.5 mm (3.8 in) |
| 2026 | 91.4 mm (3.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1893 | 27 days |
| 1894 | 26 days |
| 1895 | 21 days |
| 1896 | 22 days |
| 1897 | 47 days |
| 1898 | 18 days |
| 1899 | 26 days |
| 1900 | 16 days |
| 1902 | n/a |
| 1903 | 54 days |
| 1904 | 26 days |
| 1905 | 22 days |
| 1906 | 23 days |
| 1907 | 25 days |
| 1908 | 30 days |
| 1909 | 27 days |
| 1910 | 34 days |
| 1911 | 37 days |
| 1912 | 21 days |
| 1913 | 44 days |
| 1914 | 46 days |
| 1915 | 33 days |
| 1916 | 31 days |
| 1917 | 28 days |
| 1918 | 22 days |
| 1919 | 31 days |
| 1920 | 31 days |
| 1921 | 26 days |
| 1922 | 17 days |
| 1923 | 26 days |
| 1924 | 21 days |
| 1925 | 25 days |
| 1926 | 21 days |
| 1927 | 22 days |
| 1928 | 17 days |
| 1929 | 20 days |
| 1930 | 33 days |
| 1931 | 23 days |
| 1932 | 30 days |
| 1933 | 26 days |
| 1934 | 41 days |
| 1935 | 25 days |
| 1936 | 26 days |
| 1937 | 26 days |
| 1938 | 27 days |
| 1939 | 22 days |
| 1940 | 21 days |
| 1941 | 22 days |
| 1942 | 38 days |
| 1943 | 53 days |
| 1944 | 39 days |
| 1945 | 22 days |
| 1946 | 34 days |
| 1947 | 22 days |
| 1948 | 22 days |
| 1949 | 33 days |
| 1950 | 31 days |
| 1951 | 20 days |
| 1952 | 53 days |
| 1953 | 30 days |
| 1954 | 30 days |
| 1955 | 23 days |
| 1956 | 27 days |
| 1957 | 23 days |
| 1958 | 32 days |
| 1959 | 18 days |
| 1960 | 23 days |
| 1961 | 16 days |
| 1962 | 49 days |
| 1963 | 29 days |
| 1964 | 38 days |
| 1965 | 20 days |
| 1966 | 26 days |
| 1967 | 19 days |
| 1968 | 29 days |
| 1969 | 22 days |
| 1970 | 27 days |
| 1971 | 27 days |
| 1972 | 27 days |
| 1973 | 18 days |
| 1974 | 18 days |
| 1975 | 28 days |
| 1976 | 45 days |
| 1977 | 18 days |
| 1978 | 21 days |
| 1979 | 29 days |
| 1980 | 30 days |
| 1981 | 26 days |
| 1982 | 25 days |
| 1983 | 17 days |
| 1984 | 29 days |
| 1985 | 16 days |
| 1986 | 33 days |
| 1987 | 25 days |
| 1988 | 25 days |
| 1989 | 23 days |
| 1990 | 19 days |
| 1991 | 37 days |
| 1992 | 20 days |
| 1993 | 22 days |
| 1994 | 28 days |
| 1995 | 35 days |
| 1996 | 56 days |
| 1997 | 24 days |
| 1998 | 39 days |
| 1999 | 27 days |
| 2000 | 17 days |
| 2001 | 20 days |
| 2002 | 50 days |
| 2003 | 28 days |
| 2004 | 25 days |
| 2005 | 17 days |
| 2006 | 25 days |
| 2007 | 30 days |
| 2008 | 16 days |
| 2009 | 30 days |
| 2010 | 28 days |
| 2011 | 20 days |
| 2012 | 27 days |
| 2013 | 27 days |
| 2014 | 13 days |
| 2015 | 24 days |
| 2016 | 23 days |
| 2017 | 33 days |
| 2018 | 24 days |
| 2019 | 18 days |
| 2020 | 28 days |
| 2021 | 19 days |
| 2022 | 31 days |
| 2023 | 24 days |
| 2024 | 34 days |
| 2025 | 41 days |
| 2026 | 16 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
114 years with a frostAcross 114 years with a frost, the median last spring frost at Mason City falls on 6 May and the median first autumn frost on 2 October, which leaves a median of 152 days between them.
In 1995 to 2025 the median growing season was 157 days. That is 8 days more than in 1898 to 1936.
Fitted over all years, the growing season changes by +1.3 days per decade at this station.
| Measure | Median, all years | Earliest period (1898 to 1936) | Recent period (1995 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 6 May | 7 May | 1 May | 6 days earlier | -0.8 days per decade |
| First autumn frost | 2 October | 2 October | 8 October | 6 days later | +0.6 days per decade |
| Growing days | 152 days | 149 days | 157 days | 8 days more | +1.3 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
120 years, 1895 to 2025A day with at least 63.4 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 156.5 mm (6.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 63.4 mm (2.5 in) | |
| 5 years | 84.8 mm (3.3 in) | |
| 10 years | 100.3 mm (3.9 in) | |
| 25 years | 121.5 mm (4.8 in) | |
| 50 years | 138.5 mm (5.5 in) | |
| 100 years | 156.5 mm (6.2 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 120 years of values from 1895 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: 158.8 mm (6.3 in) in 1980; 132.1 mm (5.2 in) in 1964; 127.5 mm (5.0 in) in 1983.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2010 to 2025 against 1961 to 1990Over 2010 to 2025, Mason City had a mean temperature of 8.0 C (46.4 F) and 920.5 mm (36.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Toledo 3N (United States, 135 km away), Colo (United States, 128 km away) and Grinnell 3 SW (United States, 165 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Colo | United States | 128 km (80 mi) | 8.3 C (47.0 F) | 866.4 mm (34.1 in) | 0.77 |
| Toledo 3N | United States | 135 km (84 mi) | 8.3 C (47.0 F) | 881.4 mm (34.7 in) | 0.77 |
| Grinnell 3 SW | United States | 165 km (103 mi) | 8.2 C (46.8 F) | 913.5 mm (36.0 in) | 0.77 |
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 (2026-10-15).