Le Mars Weather Records (USC00134735)
Record envelope, standing records and threshold days for Le Mars (USC00134735), Iowa, United States, with 131 years of record.
Key Facts for Le Mars
- Le Mars (USC00134735) is a weather station in Iowa, United States at 42.79 latitude and -96.15 longitude, 396 m (1,299 ft) above sea level.
- The station reports from 1896 to 2026, 131 years of record.
- 1,464 records set at Le Mars still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Le Mars set a daily record precipitation of 50.8 mm (2.0 in) on 2 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, 42.79 latitude, -96.15 longitude.
- Elevation: 396 m (1,299 ft).
- Period of record: 1896 to 2026, 131 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
8 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) | -38.3 C (-36.9 F) | 14.4 C (57.9 F) | -26.1 C (-15.0 F) |
| Feb | 22.8 C (73.0 F) | -37.2 C (-35.0 F) | 18.9 C (66.0 F) | -20.6 C (-5.1 F) |
| Mar | 33.9 C (93.0 F) | -32.2 C (-26.0 F) | 33.9 C (93.0 F) | -16.7 C (1.9 F) |
| Apr | 35.6 C (96.1 F) | -18.9 C (-2.0 F) | 30.6 C (87.1 F) | -3.9 C (25.0 F) |
| May | 42.2 C (108.0 F) | -8.3 C (17.1 F) | 33.9 C (93.0 F) | -1.1 C (30.0 F) |
| Jun | 41.1 C (106.0 F) | 0.6 C (33.1 F) | 35.6 C (96.1 F) | 10.6 C (51.1 F) |
| Jul | 43.9 C (111.0 F) | 3.3 C (37.9 F) | 35.6 C (96.1 F) | 13.9 C (57.0 F) |
| Aug | 42.2 C (108.0 F) | 1.7 C (35.1 F) | 32.8 C (91.0 F) | 11.1 C (52.0 F) |
| Sep | 39.4 C (102.9 F) | -5.6 C (21.9 F) | 35.0 C (95.0 F) | 11.7 C (53.1 F) |
| Oct | 36.1 C (97.0 F) | -21.7 C (-7.1 F) | 31.7 C (89.1 F) | 5.0 C (41.0 F) |
| Nov | 26.7 C (80.1 F) | -31.1 C (-24.0 F) | n/a | n/a |
| Dec | 20.0 C (68.0 F) | -36.1 C (-33.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1896 | 13 |
| 1897 | 15 |
| 1898 | 5 |
| 1899 | 16 |
| 1900 | 5 |
| 1901 | 10 |
| 1902 | 15 |
| 1903 | 9 |
| 1904 | 7 |
| 1905 | 15 |
| 1906 | 6 |
| 1907 | 12 |
| 1908 | 9 |
| 1909 | 13 |
| 1910 | 10 |
| 1911 | 7 |
| 1912 | 11 |
| 1913 | 15 |
| 1914 | 14 |
| 1915 | 12 |
| 1916 | 9 |
| 1917 | 17 |
| 1918 | 10 |
| 1919 | 8 |
| 1920 | 10 |
| 1921 | 11 |
| 1922 | 7 |
| 1923 | 13 |
| 1924 | 20 |
| 1925 | 23 |
| 1926 | 11 |
| 1927 | 7 |
| 1928 | 12 |
| 1929 | 5 |
| 1930 | 19 |
| 1931 | 27 |
| 1932 | 7 |
| 1933 | 19 |
| 1934 | 36 |
| 1935 | 15 |
| 1936 | 44 |
| 1937 | 21 |
| 1938 | 9 |
| 1939 | 22 |
| 1940 | 9 |
| 1941 | 14 |
| 1942 | 11 |
| 1943 | 8 |
| 1944 | 11 |
| 1945 | 12 |
| 1946 | 9 |
| 1947 | 13 |
| 1948 | 4 |
| 1949 | 5 |
| 1950 | 7 |
| 1951 | 6 |
| 1952 | 6 |
| 1953 | 5 |
| 1954 | 9 |
| 1955 | 22 |
| 1956 | 14 |
| 1957 | 3 |
| 1958 | 16 |
| 1959 | 15 |
| 1960 | 13 |
| 1961 | 7 |
| 1962 | 14 |
| 1963 | 15 |
| 1964 | 18 |
| 1965 | 12 |
| 1966 | 13 |
| 1967 | 21 |
| 1968 | 11 |
| 1969 | 10 |
| 1970 | 13 |
| 1971 | 7 |
| 1972 | 5 |
| 1973 | 10 |
| 1974 | 13 |
| 1975 | 8 |
| 1976 | 9 |
| 1977 | 10 |
| 1978 | 5 |
| 1979 | 9 |
| 1980 | 12 |
| 1981 | 17 |
| 1982 | 6 |
| 1983 | 9 |
| 1984 | 4 |
| 1985 | 12 |
| 1986 | 6 |
| 1987 | 13 |
| 1988 | 10 |
| 1989 | 16 |
| 1990 | 7 |
| 1991 | 21 |
| 1992 | 9 |
| 1993 | 4 |
| 1994 | 7 |
| 1995 | 10 |
| 1996 | 14 |
| 1997 | 18 |
| 1998 | 8 |
| 1999 | 5 |
| 2000 | 16 |
| 2001 | 8 |
| 2002 | 7 |
| 2003 | 5 |
| 2004 | 8 |
| 2005 | 9 |
| 2006 | 4 |
| 2007 | 5 |
| 2008 | 6 |
| 2009 | 6 |
| 2010 | 3 |
| 2011 | 7 |
| 2012 | 22 |
| 2013 | 11 |
| 2014 | 9 |
| 2015 | 4 |
| 2016 | 5 |
| 2017 | 7 |
| 2018 | 13 |
| 2019 | 4 |
| 2020 | 13 |
| 2021 | 12 |
| 2022 | 11 |
| 2023 | 16 |
| 2024 | 7 |
| 2025 | 8 |
| 2026 | 7 |
All-Time Record Progression
10 new records| Date | Kind | Detail |
|---|---|---|
| 1926-07-19 | Record high maximum temperature | Record high maximum temperature 41.7 C (107.1 F) |
| 1930-08-03 | Record high maximum temperature | Record high maximum temperature 42.2 C (108.0 F) |
| 1936-07-04 | Record high maximum temperature | Record high maximum temperature 42.8 C (109.0 F) |
| 1936-07-17 | Record high maximum temperature | Record high maximum temperature 43.9 C (111.0 F) |
| 1936-08-18 | Record high minimum temperature | Record high minimum temperature 29.4 C (84.9 F) |
| 1937-02-05 | Record snow depth | Record snow depth 495.3 cm (195.0 in) |
| 1982-01-22 | Record daily snowfall | Record daily snowfall 38.6 cm (15.2 in) |
| 1983-12-24 | Record low maximum temperature | Record low maximum temperature -26.1 C (-15.0 F) |
| 1985-08-29 | Record daily precipitation | Record daily precipitation 222.5 mm (8.8 in) |
| 1989-12-22 | Record low maximum temperature | Record low maximum temperature -27.2 C (-17.0 F) |
Wettest Day of Each Month
Aug: 222.5 mm (8.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 35.6 mm (1.4 in) | 22 January 1982 |
| Feb | 41.4 mm (1.6 in) | 28 February 1951 |
| Mar | 93.0 mm (3.7 in) | 20 March 1969 |
| Apr | 65.0 mm (2.6 in) | 22 April 1985 |
| May | 61.2 mm (2.4 in) | 7 May 1930 |
| Jun | 132.1 mm (5.2 in) | 21 June 1996 |
| Jul | 136.9 mm (5.4 in) | 15 July 1900 |
| Aug | 222.5 mm (8.8 in) | 29 August 1985 |
| Sep | 139.7 mm (5.5 in) | 11 September 1900 |
| Oct | 79.5 mm (3.1 in) | 30 October 1979 |
| Nov | 55.9 mm (2.2 in) | 23 November 1905 |
| Dec | 54.6 mm (2.1 in) | 20 December 1902 |
Period of Record Coverage
1896 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1896 | 306 | 84% | No |
| 1897 | 359 | 98% | Yes |
| 1898 | 364 | 100% | Yes |
| 1899 | 365 | 100% | Yes |
| 1900 | 363 | 99% | Yes |
| 1901 | 362 | 99% | Yes |
| 1902 | 365 | 100% | Yes |
| 1903 | 361 | 99% | Yes |
| 1904 | 322 | 88% | No |
| 1905 | 364 | 100% | Yes |
| 1906 | 352 | 96% | Yes |
| 1907 | 360 | 99% | Yes |
| 1908 | 366 | 100% | Yes |
| 1909 | 362 | 99% | Yes |
| 1910 | 364 | 100% | Yes |
| 1911 | 365 | 100% | Yes |
| 1912 | 365 | 100% | Yes |
| 1913 | 365 | 100% | Yes |
| 1914 | 364 | 100% | Yes |
| 1915 | 365 | 100% | Yes |
| 1916 | 365 | 100% | Yes |
| 1917 | 364 | 100% | Yes |
| 1918 | 364 | 100% | Yes |
| 1919 | 273 | 75% | No |
| 1920 | 333 | 91% | Yes |
| 1921 | 364 | 100% | Yes |
| 1922 | 363 | 99% | Yes |
| 1923 | 364 | 100% | Yes |
| 1924 | 365 | 100% | Yes |
| 1925 | 363 | 99% | Yes |
| 1926 | 364 | 100% | Yes |
| 1927 | 364 | 100% | Yes |
| 1928 | 364 | 99% | Yes |
| 1929 | 362 | 99% | Yes |
| 1930 | 364 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 364 | 99% | Yes |
| 1933 | 363 | 99% | Yes |
| 1934 | 363 | 99% | Yes |
| 1935 | 363 | 99% | Yes |
| 1936 | 365 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 364 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 363 | 99% | Yes |
| 1944 | 364 | 99% | Yes |
| 1945 | 360 | 99% | Yes |
| 1946 | 363 | 99% | Yes |
| 1947 | 363 | 99% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 364 | 100% | Yes |
| 1951 | 361 | 99% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 362 | 99% | Yes |
| 1957 | 360 | 99% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 363 | 99% | Yes |
| 1960 | 362 | 99% | Yes |
| 1961 | 359 | 98% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 363 | 99% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 365 | 100% | Yes |
| 1969 | 361 | 99% | Yes |
| 1970 | 363 | 99% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 364 | 99% | Yes |
| 1973 | 335 | 92% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 364 | 99% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 362 | 99% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 362 | 99% | Yes |
| 1986 | 363 | 99% | Yes |
| 1987 | 362 | 99% | Yes |
| 1988 | 362 | 99% | Yes |
| 1989 | 339 | 93% | Yes |
| 1990 | 352 | 96% | Yes |
| 1991 | 346 | 95% | Yes |
| 1992 | 347 | 95% | Yes |
| 1993 | 353 | 97% | Yes |
| 1994 | 350 | 96% | Yes |
| 1995 | 351 | 96% | Yes |
| 1996 | 350 | 96% | Yes |
| 1997 | 358 | 98% | Yes |
| 1998 | 355 | 97% | Yes |
| 1999 | 362 | 99% | Yes |
| 2000 | 356 | 97% | Yes |
| 2001 | 361 | 99% | Yes |
| 2002 | 362 | 99% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 332 | 91% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 362 | 99% | Yes |
| 2007 | 363 | 99% | Yes |
| 2008 | 363 | 99% | Yes |
| 2009 | 333 | 91% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 363 | 99% | Yes |
| 2012 | 364 | 99% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 364 | 100% | Yes |
| 2016 | 365 | 100% | Yes |
| 2017 | 362 | 99% | Yes |
| 2018 | 361 | 99% | Yes |
| 2019 | 363 | 99% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 282 | 77% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 2 September 2026 | Le Mars, US | daily rain (Provisional) | 50.8 mm (2.0 in) | 17.0 mm (0.7 in) | 33 years | 31 of 100 (Routine) |
| 5 August 2026 | Le Mars, US | daily low max | 18.9 C (66.0 F) | 3.3 C (5.9 F) | 32 years | 27 of 100 (Routine) |
| 1 August 2026 | Le Mars, US | daily low max (Tie) | 20.6 C (69.1 F) | tie | 31 years | 4 of 100 (Routine) |
| 25 July 2026 | Le Mars, US | daily low max | 22.2 C (72.0 F) | 0.6 C (1.1 F) | 115 years | 41 of 100 (Notable) |
| 3 July 2026 | Le Mars, US | daily rain | 73.7 mm (2.9 in) | 8.7 mm (0.34 in) | 21 years | 22 of 100 (Routine) |
| 1 July 2026 | Le Mars, US | daily rain | 32.0 mm (1.3 in) | 5.8 mm (0.23 in) | 99 years | 43 of 100 (Notable) |
| 10 June 2026 | Le Mars, US | daily high min (Tie) | 21.7 C (71.1 F) | tie | 105 years | 10 of 100 (Routine) |
| 18 May 2026 | Le Mars, US | daily rain | 56.9 mm (2.2 in) | 27.4 mm (1.1 in) | 64 years | 53 of 100 (Notable) |
| 17 April 2026 | Le Mars, US | daily high max (Tie) | 30.6 C (87.1 F) | tie | 40 years | 5 of 100 (Routine) |
| 2 April 2026 | Le Mars, US | daily rain | 43.7 mm (1.7 in) | 26.7 mm (1.1 in) | 48 years | 51 of 100 (Notable) |
| 26 March 2026 | Le Mars, US | daily high max | 27.8 C (82.0 F) | 0.6 C (1.1 F) | 57 years | 27 of 100 (Routine) |
| 22 March 2026 | Le Mars, US | monthly high max | 33.9 C (93.0 F) | 3.3 C (5.9 F) | 57 years | 41 of 100 (Notable) |
| 21 March 2026 | Le Mars, US | daily high max | 27.2 C (81.0 F) | 0.5 C (0.9 F) | 116 years | 40 of 100 (Notable) |
| 9 March 2026 | Le Mars, US | daily high max | 23.3 C (73.9 F) | 2.7 C (4.9 F) | 5 years | 14 of 100 (Routine) |
| 18 February 2026 | Le Mars, US | daily high max (Tie) | 18.9 C (66.0 F) | tie | 44 years | 5 of 100 (Routine) |
| 18 February 2026 | Le Mars, US | daily high min (Tie) | 3.3 C (37.9 F) | tie | 8 years | 3 of 100 (Routine) |
| 16 February 2026 | Le Mars, US | daily high max (Tie) | 18.3 C (64.9 F) | tie | 44 years | 5 of 100 (Routine) |
| 10 February 2026 | Le Mars, US | daily high max | 18.9 C (66.0 F) | 1.7 C (3.1 F) | 27 years | 20 of 100 (Routine) |
| 28 December 2025 | Le Mars, US | daily high max (Tie) | 11.1 C (52.0 F) | tie | 12 years | 3 of 100 (Routine) |
| 27 December 2025 | Le Mars, US | daily high min (Tie) | 0.6 C (33.1 F) | tie | 0 years | 2 of 100 (Routine) |
Climate Trend
123 complete years, 1897 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1897 | 8.0 C | -0.72 C |
| 1898 | 8.2 C | -0.57 C |
| 1899 | 7.9 C | -0.89 C |
| 1900 | 9.1 C | +0.38 C |
| 1901 | 9.0 C | +0.21 C |
| 1902 | 7.9 C | -0.83 C |
| 1903 | 7.6 C | -1.15 C |
| 1905 | 7.8 C | -0.97 C |
| 1906 | 8.4 C | -0.33 C |
| 1907 | 7.7 C | -1.03 C |
| 1908 | 8.9 C | +0.15 C |
| 1909 | 7.5 C | -1.30 C |
| 1910 | 8.6 C | -0.18 C |
| 1911 | 8.6 C | -0.18 C |
| 1912 | 7.3 C | -1.42 C |
| 1913 | 9.0 C | +0.26 C |
| 1914 | 9.2 C | +0.39 C |
| 1915 | 8.2 C | -0.58 C |
| 1916 | 7.7 C | -1.03 C |
| 1917 | 6.5 C | -2.28 C |
| 1918 | 9.1 C | +0.33 C |
| 1921 | 10.4 C | +1.68 C |
| 1922 | 9.2 C | +0.39 C |
| 1923 | 8.9 C | +0.10 C |
| 1924 | 7.1 C | -1.63 C |
| 1925 | 8.7 C | -0.07 C |
| 1926 | 8.7 C | -0.03 C |
| 1927 | 8.6 C | -0.16 C |
| 1928 | 9.2 C | +0.45 C |
| 1929 | 7.5 C | -1.30 C |
| 1930 | 9.7 C | +0.98 C |
| 1931 | 11.8 C | +3.00 C |
| 1932 | 8.7 C | -0.11 C |
| 1933 | 10.4 C | +1.66 C |
| 1934 | 10.7 C | +1.94 C |
| 1935 | 9.1 C | +0.29 C |
| 1936 | 8.4 C | -0.36 C |
| 1937 | 8.1 C | -0.71 C |
| 1938 | 9.8 C | +1.06 C |
| 1939 | 10.1 C | +1.30 C |
| 1940 | 8.6 C | -0.21 C |
| 1941 | 10.3 C | +1.51 C |
| 1942 | 9.3 C | +0.51 C |
| 1943 | 8.7 C | -0.05 C |
| 1944 | 9.2 C | +0.45 C |
| 1945 | 8.3 C | -0.49 C |
| 1946 | 9.9 C | +1.12 C |
| 1947 | 8.9 C | +0.12 C |
| 1948 | 9.0 C | +0.24 C |
| 1949 | 9.2 C | +0.46 C |
| 1950 | 7.9 C | -0.91 C |
| 1951 | 7.6 C | -1.15 C |
| 1952 | 9.2 C | +0.48 C |
| 1953 | 9.9 C | +1.15 C |
| 1954 | 9.7 C | +0.98 C |
| 1955 | 9.5 C | +0.70 C |
| 1956 | 9.4 C | +0.68 C |
| 1957 | 9.0 C | +0.21 C |
| 1958 | 8.7 C | -0.02 C |
| 1959 | 8.4 C | -0.34 C |
| 1960 | 7.4 C | -1.32 C |
| 1961 | 7.8 C | -0.99 C |
| 1962 | 8.1 C | -0.70 C |
| 1963 | 9.2 C | +0.44 C |
| 1964 | 9.0 C | +0.19 C |
| 1965 | 8.0 C | -0.73 C |
| 1966 | 7.9 C | -0.88 C |
| 1967 | 8.3 C | -0.49 C |
| 1968 | 8.7 C | -0.03 C |
| 1969 | 7.5 C | -1.26 C |
| 1970 | 8.1 C | -0.63 C |
| 1971 | 8.6 C | -0.21 C |
| 1972 | 7.6 C | -1.16 C |
| 1974 | 10.1 C | +1.29 C |
| 1975 | 9.2 C | +0.45 C |
| 1976 | 10.0 C | +1.28 C |
| 1977 | 9.9 C | +1.16 C |
| 1978 | 8.2 C | -0.55 C |
| 1979 | 8.2 C | -0.55 C |
| 1980 | 10.3 C | +1.49 C |
| 1981 | 10.7 C | +1.93 C |
| 1982 | 8.7 C | -0.09 C |
| 1983 | 9.2 C | +0.40 C |
| 1984 | 9.1 C | +0.32 C |
| 1985 | 8.1 C | -0.66 C |
| 1986 | 9.7 C | +0.98 C |
| 1987 | 11.2 C | +2.42 C |
| 1988 | 9.7 C | +0.90 C |
| 1989 | 7.7 C | -1.06 C |
| 1990 | 9.0 C | +0.20 C |
| 1991 | 8.5 C | -0.22 C |
| 1992 | 8.4 C | -0.32 C |
| 1993 | 6.6 C | -2.15 C |
| 1994 | 7.9 C | -0.83 C |
| 1995 | 7.9 C | -0.82 C |
| 1996 | 6.3 C | -2.44 C |
| 1997 | 7.8 C | -0.94 C |
| 1998 | 10.0 C | +1.22 C |
| 1999 | 9.6 C | +0.83 C |
| 2000 | 8.7 C | -0.09 C |
| 2001 | 8.9 C | +0.17 C |
| 2002 | 9.0 C | +0.21 C |
| 2003 | 8.3 C | -0.48 C |
| 2005 | 9.3 C | +0.53 C |
| 2006 | 9.6 C | +0.83 C |
| 2007 | 8.7 C | -0.02 C |
| 2008 | 6.9 C | -1.86 C |
| 2010 | 8.2 C | -0.57 C |
| 2011 | 8.4 C | -0.37 C |
| 2012 | 10.8 C | +2.03 C |
| 2013 | 7.6 C | -1.13 C |
| 2014 | 7.4 C | -1.37 C |
| 2015 | 9.4 C | +0.60 C |
| 2016 | 9.7 C | +0.91 C |
| 2017 | 9.2 C | +0.45 C |
| 2018 | 7.7 C | -1.10 C |
| 2019 | 7.3 C | -1.45 C |
| 2020 | 9.2 C | +0.42 C |
| 2021 | 9.8 C | +1.02 C |
| 2022 | 8.4 C | -0.33 C |
| 2023 | 9.7 C | +0.89 C |
| 2024 | 10.0 C | +1.26 C |
| 2025 | 9.4 C | +0.64 C |
The fitted trend in annual mean temperature here over 1897 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 123 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 | 1897 to 2025 | 123 | Not clearly different from zero |
| Mean daily maximum | 0.03 C (-0.03 to 0.09) per decade | 0.05 F (-0.05 to 0.15) per decade | 1897 to 2025 | 123 | Not clearly different from zero |
| Mean daily minimum | 0.02 C (-0.03 to 0.06) per decade | 0.03 F (-0.06 to 0.11) per decade | 1897 to 2025 | 123 | 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
1896 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 43.9 C (111.0 F) | 1936 | 36.7 C (98.1 F) | 131 |
| Coldest night (TNn) | -38.3 C (-36.9 F) | 1912 | -28.9 C (-20.0 F) | 131 |
| Wettest day (Rx1day) | 222.5 mm (8.8 in) | 1985 | 57.2 mm (2.3 in) | 131 |
| Wettest five days (Rx5day) | 222.8 mm (8.8 in) | 1985 | 87.2 mm (3.4 in) | 131 |
| Longest dry spell (CDD) | 67 days | 2017 | 30 days | 131 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1896 | 36.1 C (97.0 F) |
| 1897 | 37.2 C (99.0 F) |
| 1898 | 36.7 C (98.1 F) |
| 1899 | 35.6 C (96.1 F) |
| 1900 | 35.6 C (96.1 F) |
| 1901 | 40.6 C (105.1 F) |
| 1902 | 33.9 C (93.0 F) |
| 1903 | 33.3 C (91.9 F) |
| 1904 | 33.9 C (93.0 F) |
| 1905 | 36.1 C (97.0 F) |
| 1906 | 35.0 C (95.0 F) |
| 1907 | 36.1 C (97.0 F) |
| 1908 | 36.1 C (97.0 F) |
| 1909 | 33.3 C (91.9 F) |
| 1910 | 34.4 C (93.9 F) |
| 1911 | 36.1 C (97.0 F) |
| 1912 | 34.4 C (93.9 F) |
| 1913 | 36.1 C (97.0 F) |
| 1914 | 37.2 C (99.0 F) |
| 1915 | 30.0 C (86.0 F) |
| 1916 | 35.0 C (95.0 F) |
| 1917 | 37.2 C (99.0 F) |
| 1918 | 35.6 C (96.1 F) |
| 1919 | 37.8 C (100.0 F) |
| 1920 | 36.7 C (98.1 F) |
| 1921 | 36.7 C (98.1 F) |
| 1922 | 37.2 C (99.0 F) |
| 1923 | 36.1 C (97.0 F) |
| 1924 | 33.9 C (93.0 F) |
| 1925 | 38.9 C (102.0 F) |
| 1926 | 41.7 C (107.1 F) |
| 1927 | 36.1 C (97.0 F) |
| 1928 | 35.6 C (96.1 F) |
| 1929 | 37.8 C (100.0 F) |
| 1930 | 42.2 C (108.0 F) |
| 1931 | 40.0 C (104.0 F) |
| 1932 | 38.9 C (102.0 F) |
| 1933 | 41.1 C (106.0 F) |
| 1934 | 42.2 C (108.0 F) |
| 1935 | 38.9 C (102.0 F) |
| 1936 | 43.9 C (111.0 F) |
| 1937 | 41.7 C (107.1 F) |
| 1938 | 38.3 C (100.9 F) |
| 1939 | 40.0 C (104.0 F) |
| 1940 | 41.1 C (106.0 F) |
| 1941 | 38.9 C (102.0 F) |
| 1942 | 40.0 C (104.0 F) |
| 1943 | 36.7 C (98.1 F) |
| 1944 | 36.1 C (97.0 F) |
| 1945 | 35.6 C (96.1 F) |
| 1946 | 40.6 C (105.1 F) |
| 1947 | 40.6 C (105.1 F) |
| 1948 | 37.2 C (99.0 F) |
| 1949 | 36.7 C (98.1 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 35.0 C (95.0 F) |
| 1952 | 36.1 C (97.0 F) |
| 1953 | 38.3 C (100.9 F) |
| 1954 | 39.4 C (102.9 F) |
| 1955 | 40.6 C (105.1 F) |
| 1956 | 37.8 C (100.0 F) |
| 1957 | 36.7 C (98.1 F) |
| 1958 | 36.1 C (97.0 F) |
| 1959 | 36.7 C (98.1 F) |
| 1960 | 37.2 C (99.0 F) |
| 1961 | 37.2 C (99.0 F) |
| 1962 | 34.4 C (93.9 F) |
| 1963 | 35.0 C (95.0 F) |
| 1964 | 37.8 C (100.0 F) |
| 1965 | 37.2 C (99.0 F) |
| 1966 | 37.2 C (99.0 F) |
| 1967 | 39.4 C (102.9 F) |
| 1968 | 37.2 C (99.0 F) |
| 1969 | 35.0 C (95.0 F) |
| 1970 | 36.7 C (98.1 F) |
| 1971 | 36.7 C (98.1 F) |
| 1972 | 35.6 C (96.1 F) |
| 1973 | 37.2 C (99.0 F) |
| 1974 | 39.4 C (102.9 F) |
| 1975 | 36.7 C (98.1 F) |
| 1976 | 40.0 C (104.0 F) |
| 1977 | 37.2 C (99.0 F) |
| 1978 | 37.2 C (99.0 F) |
| 1979 | 37.8 C (100.0 F) |
| 1980 | 41.1 C (106.0 F) |
| 1981 | 38.3 C (100.9 F) |
| 1982 | 38.9 C (102.0 F) |
| 1983 | 40.0 C (104.0 F) |
| 1984 | 37.2 C (99.0 F) |
| 1985 | 38.3 C (100.9 F) |
| 1986 | 33.9 C (93.0 F) |
| 1987 | 36.7 C (98.1 F) |
| 1988 | 40.6 C (105.1 F) |
| 1989 | 38.9 C (102.0 F) |
| 1990 | 39.4 C (102.9 F) |
| 1991 | 35.6 C (96.1 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 36.1 C (97.0 F) |
| 1995 | 40.6 C (105.1 F) |
| 1996 | 35.0 C (95.0 F) |
| 1997 | 35.0 C (95.0 F) |
| 1998 | 34.4 C (93.9 F) |
| 1999 | 34.4 C (93.9 F) |
| 2000 | 37.2 C (99.0 F) |
| 2001 | 37.2 C (99.0 F) |
| 2002 | 36.1 C (97.0 F) |
| 2003 | 35.0 C (95.0 F) |
| 2004 | 33.3 C (91.9 F) |
| 2005 | 34.4 C (93.9 F) |
| 2006 | 37.2 C (99.0 F) |
| 2007 | 35.0 C (95.0 F) |
| 2008 | 33.9 C (93.0 F) |
| 2009 | 35.0 C (95.0 F) |
| 2010 | 34.4 C (93.9 F) |
| 2011 | 36.7 C (98.1 F) |
| 2012 | 39.4 C (102.9 F) |
| 2013 | 38.3 C (100.9 F) |
| 2014 | 33.3 C (91.9 F) |
| 2015 | 36.1 C (97.0 F) |
| 2016 | 36.1 C (97.0 F) |
| 2017 | 35.6 C (96.1 F) |
| 2018 | 38.3 C (100.9 F) |
| 2019 | 36.7 C (98.1 F) |
| 2020 | 37.8 C (100.0 F) |
| 2021 | 36.7 C (98.1 F) |
| 2022 | 38.3 C (100.9 F) |
| 2023 | 38.3 C (100.9 F) |
| 2024 | 36.7 C (98.1 F) |
| 2025 | 37.2 C (99.0 F) |
| 2026 | 35.6 C (96.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1896 | -22.8 C (-9.0 F) |
| 1897 | -28.3 C (-18.9 F) |
| 1898 | -26.1 C (-15.0 F) |
| 1899 | -37.2 C (-35.0 F) |
| 1900 | -26.7 C (-16.1 F) |
| 1901 | -35.0 C (-31.0 F) |
| 1902 | -31.1 C (-24.0 F) |
| 1903 | -28.3 C (-18.9 F) |
| 1904 | -30.6 C (-23.1 F) |
| 1905 | -37.2 C (-35.0 F) |
| 1906 | -27.2 C (-17.0 F) |
| 1907 | -31.1 C (-24.0 F) |
| 1908 | -25.0 C (-13.0 F) |
| 1909 | -28.3 C (-18.9 F) |
| 1910 | -28.3 C (-18.9 F) |
| 1911 | -32.2 C (-26.0 F) |
| 1912 | -38.3 C (-36.9 F) |
| 1913 | -26.1 C (-15.0 F) |
| 1914 | -30.0 C (-22.0 F) |
| 1915 | -28.3 C (-18.9 F) |
| 1916 | -33.3 C (-27.9 F) |
| 1917 | -36.1 C (-33.0 F) |
| 1918 | -32.8 C (-27.0 F) |
| 1919 | -30.0 C (-22.0 F) |
| 1920 | -26.7 C (-16.1 F) |
| 1921 | -25.0 C (-13.0 F) |
| 1922 | -27.8 C (-18.0 F) |
| 1923 | -26.1 C (-15.0 F) |
| 1924 | -34.4 C (-29.9 F) |
| 1925 | -26.7 C (-16.1 F) |
| 1926 | -27.2 C (-17.0 F) |
| 1927 | -27.2 C (-17.0 F) |
| 1928 | -25.6 C (-14.1 F) |
| 1929 | -30.0 C (-22.0 F) |
| 1930 | -31.7 C (-25.1 F) |
| 1931 | -21.1 C (-6.0 F) |
| 1932 | -28.9 C (-20.0 F) |
| 1933 | -31.1 C (-24.0 F) |
| 1934 | -25.0 C (-13.0 F) |
| 1935 | -28.3 C (-18.9 F) |
| 1936 | -33.3 C (-27.9 F) |
| 1937 | -29.4 C (-20.9 F) |
| 1938 | -25.0 C (-13.0 F) |
| 1939 | -26.7 C (-16.1 F) |
| 1940 | -30.6 C (-23.1 F) |
| 1941 | -22.8 C (-9.0 F) |
| 1942 | -31.1 C (-24.0 F) |
| 1943 | -31.1 C (-24.0 F) |
| 1944 | -30.6 C (-23.1 F) |
| 1945 | -23.9 C (-11.0 F) |
| 1946 | -27.8 C (-18.0 F) |
| 1947 | -24.4 C (-11.9 F) |
| 1948 | -28.9 C (-20.0 F) |
| 1949 | -27.2 C (-17.0 F) |
| 1950 | -29.4 C (-20.9 F) |
| 1951 | -27.2 C (-17.0 F) |
| 1952 | -25.6 C (-14.1 F) |
| 1953 | -29.4 C (-20.9 F) |
| 1954 | -30.0 C (-22.0 F) |
| 1955 | -27.2 C (-17.0 F) |
| 1956 | -29.4 C (-20.9 F) |
| 1957 | -31.1 C (-24.0 F) |
| 1958 | -35.6 C (-32.1 F) |
| 1959 | -32.2 C (-26.0 F) |
| 1960 | -32.2 C (-26.0 F) |
| 1961 | -31.7 C (-25.1 F) |
| 1962 | -36.7 C (-34.1 F) |
| 1963 | -31.7 C (-25.1 F) |
| 1964 | -29.4 C (-20.9 F) |
| 1965 | -32.2 C (-26.0 F) |
| 1966 | -33.3 C (-27.9 F) |
| 1967 | -34.4 C (-29.9 F) |
| 1968 | -33.3 C (-27.9 F) |
| 1969 | -32.2 C (-26.0 F) |
| 1970 | -37.2 C (-35.0 F) |
| 1971 | -31.1 C (-24.0 F) |
| 1972 | -33.3 C (-27.9 F) |
| 1973 | -30.6 C (-23.1 F) |
| 1974 | -31.7 C (-25.1 F) |
| 1975 | -27.2 C (-17.0 F) |
| 1976 | -28.3 C (-18.9 F) |
| 1977 | -30.0 C (-22.0 F) |
| 1978 | -30.6 C (-23.1 F) |
| 1979 | -32.2 C (-26.0 F) |
| 1980 | -29.4 C (-20.9 F) |
| 1981 | -28.9 C (-20.0 F) |
| 1982 | -33.9 C (-29.0 F) |
| 1983 | -31.7 C (-25.1 F) |
| 1984 | -30.0 C (-22.0 F) |
| 1985 | -29.4 C (-20.9 F) |
| 1986 | -26.1 C (-15.0 F) |
| 1987 | -24.4 C (-11.9 F) |
| 1988 | -30.6 C (-23.1 F) |
| 1989 | -33.3 C (-27.9 F) |
| 1990 | -27.8 C (-18.0 F) |
| 1991 | -26.1 C (-15.0 F) |
| 1992 | -25.0 C (-13.0 F) |
| 1993 | -26.7 C (-16.1 F) |
| 1994 | -31.1 C (-24.0 F) |
| 1995 | -25.0 C (-13.0 F) |
| 1996 | -32.8 C (-27.0 F) |
| 1997 | -27.2 C (-17.0 F) |
| 1998 | -25.0 C (-13.0 F) |
| 1999 | -27.8 C (-18.0 F) |
| 2000 | -27.2 C (-17.0 F) |
| 2001 | -27.8 C (-18.0 F) |
| 2002 | -23.3 C (-9.9 F) |
| 2003 | -26.1 C (-15.0 F) |
| 2004 | -28.3 C (-18.9 F) |
| 2005 | -26.7 C (-16.1 F) |
| 2006 | -27.8 C (-18.0 F) |
| 2007 | -28.3 C (-18.9 F) |
| 2008 | -29.4 C (-20.9 F) |
| 2009 | -33.3 C (-27.9 F) |
| 2010 | -35.0 C (-31.0 F) |
| 2011 | -27.2 C (-17.0 F) |
| 2012 | -23.9 C (-11.0 F) |
| 2013 | -24.4 C (-11.9 F) |
| 2014 | -27.2 C (-17.0 F) |
| 2015 | -26.7 C (-16.1 F) |
| 2016 | -31.7 C (-25.1 F) |
| 2017 | -26.7 C (-16.1 F) |
| 2018 | -30.6 C (-23.1 F) |
| 2019 | -30.0 C (-22.0 F) |
| 2020 | -24.4 C (-11.9 F) |
| 2021 | -34.4 C (-29.9 F) |
| 2022 | -27.8 C (-18.0 F) |
| 2023 | -25.0 C (-13.0 F) |
| 2024 | -28.9 C (-20.0 F) |
| 2025 | -28.3 C (-18.9 F) |
| 2026 | -26.1 C (-15.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1896 | 50.0 mm (2.0 in) |
| 1897 | 40.1 mm (1.6 in) |
| 1898 | 44.5 mm (1.8 in) |
| 1899 | 44.5 mm (1.8 in) |
| 1900 | 139.7 mm (5.5 in) |
| 1901 | 59.2 mm (2.3 in) |
| 1902 | 89.4 mm (3.5 in) |
| 1903 | 52.1 mm (2.1 in) |
| 1904 | 48.3 mm (1.9 in) |
| 1905 | 90.2 mm (3.6 in) |
| 1906 | 77.5 mm (3.1 in) |
| 1907 | 45.7 mm (1.8 in) |
| 1908 | 44.5 mm (1.8 in) |
| 1909 | 110.7 mm (4.4 in) |
| 1910 | 34.5 mm (1.4 in) |
| 1911 | 90.2 mm (3.6 in) |
| 1912 | 51.8 mm (2.0 in) |
| 1913 | 61.0 mm (2.4 in) |
| 1914 | 76.2 mm (3.0 in) |
| 1915 | 39.9 mm (1.6 in) |
| 1916 | 48.3 mm (1.9 in) |
| 1917 | 54.6 mm (2.1 in) |
| 1918 | 34.0 mm (1.3 in) |
| 1919 | 104.6 mm (4.1 in) |
| 1920 | 43.7 mm (1.7 in) |
| 1921 | 87.9 mm (3.5 in) |
| 1922 | 77.5 mm (3.1 in) |
| 1923 | 54.9 mm (2.2 in) |
| 1924 | 47.5 mm (1.9 in) |
| 1925 | 62.2 mm (2.4 in) |
| 1926 | 84.6 mm (3.3 in) |
| 1927 | 40.1 mm (1.6 in) |
| 1928 | 57.2 mm (2.3 in) |
| 1929 | 34.3 mm (1.4 in) |
| 1930 | 61.2 mm (2.4 in) |
| 1931 | 29.2 mm (1.1 in) |
| 1932 | 61.5 mm (2.4 in) |
| 1933 | 62.5 mm (2.5 in) |
| 1934 | 69.1 mm (2.7 in) |
| 1935 | 37.6 mm (1.5 in) |
| 1936 | 45.0 mm (1.8 in) |
| 1937 | 38.6 mm (1.5 in) |
| 1938 | 67.3 mm (2.6 in) |
| 1939 | 44.7 mm (1.8 in) |
| 1940 | 75.4 mm (3.0 in) |
| 1941 | 59.9 mm (2.4 in) |
| 1942 | 39.4 mm (1.6 in) |
| 1943 | 35.6 mm (1.4 in) |
| 1944 | 45.7 mm (1.8 in) |
| 1945 | 54.6 mm (2.1 in) |
| 1946 | 36.3 mm (1.4 in) |
| 1947 | 33.0 mm (1.3 in) |
| 1948 | 51.3 mm (2.0 in) |
| 1949 | 94.2 mm (3.7 in) |
| 1950 | 130.3 mm (5.1 in) |
| 1951 | 73.2 mm (2.9 in) |
| 1952 | 85.6 mm (3.4 in) |
| 1953 | 76.7 mm (3.0 in) |
| 1954 | 74.9 mm (2.9 in) |
| 1955 | 34.8 mm (1.4 in) |
| 1956 | 26.4 mm (1.0 in) |
| 1957 | 49.0 mm (1.9 in) |
| 1958 | 33.3 mm (1.3 in) |
| 1959 | 53.3 mm (2.1 in) |
| 1960 | 63.2 mm (2.5 in) |
| 1961 | 72.6 mm (2.9 in) |
| 1962 | 45.5 mm (1.8 in) |
| 1963 | 30.5 mm (1.2 in) |
| 1964 | 79.2 mm (3.1 in) |
| 1965 | 49.3 mm (1.9 in) |
| 1966 | 45.7 mm (1.8 in) |
| 1967 | 50.8 mm (2.0 in) |
| 1968 | 59.2 mm (2.3 in) |
| 1969 | 93.0 mm (3.7 in) |
| 1970 | 31.8 mm (1.3 in) |
| 1971 | 50.0 mm (2.0 in) |
| 1972 | 58.7 mm (2.3 in) |
| 1973 | 95.0 mm (3.7 in) |
| 1974 | 81.0 mm (3.2 in) |
| 1975 | 34.8 mm (1.4 in) |
| 1976 | 36.6 mm (1.4 in) |
| 1977 | 43.2 mm (1.7 in) |
| 1978 | 83.1 mm (3.3 in) |
| 1979 | 79.5 mm (3.1 in) |
| 1980 | 53.1 mm (2.1 in) |
| 1981 | 55.9 mm (2.2 in) |
| 1982 | 40.1 mm (1.6 in) |
| 1983 | 77.0 mm (3.0 in) |
| 1984 | 63.0 mm (2.5 in) |
| 1985 | 222.5 mm (8.8 in) |
| 1986 | 47.5 mm (1.9 in) |
| 1987 | 74.7 mm (2.9 in) |
| 1988 | 139.2 mm (5.5 in) |
| 1989 | 52.1 mm (2.1 in) |
| 1990 | 45.2 mm (1.8 in) |
| 1991 | 58.9 mm (2.3 in) |
| 1992 | 63.5 mm (2.5 in) |
| 1993 | 46.5 mm (1.8 in) |
| 1994 | 38.6 mm (1.5 in) |
| 1995 | 58.4 mm (2.3 in) |
| 1996 | 132.1 mm (5.2 in) |
| 1997 | 63.0 mm (2.5 in) |
| 1998 | 48.0 mm (1.9 in) |
| 1999 | 43.2 mm (1.7 in) |
| 2000 | 60.5 mm (2.4 in) |
| 2001 | 56.6 mm (2.2 in) |
| 2002 | 69.9 mm (2.8 in) |
| 2003 | 37.1 mm (1.5 in) |
| 2004 | 103.1 mm (4.1 in) |
| 2005 | 96.5 mm (3.8 in) |
| 2006 | 93.7 mm (3.7 in) |
| 2007 | 100.3 mm (3.9 in) |
| 2008 | 54.6 mm (2.1 in) |
| 2009 | 58.2 mm (2.3 in) |
| 2010 | 106.7 mm (4.2 in) |
| 2011 | 65.5 mm (2.6 in) |
| 2012 | 44.4 mm (1.7 in) |
| 2013 | 69.9 mm (2.8 in) |
| 2014 | 99.1 mm (3.9 in) |
| 2015 | 139.7 mm (5.5 in) |
| 2016 | 61.0 mm (2.4 in) |
| 2017 | 72.6 mm (2.9 in) |
| 2018 | 80.0 mm (3.1 in) |
| 2019 | 57.2 mm (2.3 in) |
| 2020 | 32.3 mm (1.3 in) |
| 2021 | 38.4 mm (1.5 in) |
| 2022 | 45.7 mm (1.8 in) |
| 2023 | 81.5 mm (3.2 in) |
| 2024 | 45.5 mm (1.8 in) |
| 2025 | 55.4 mm (2.2 in) |
| 2026 | 73.7 mm (2.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1896 | 144.5 mm (5.7 in) |
| 1897 | 100.1 mm (3.9 in) |
| 1898 | 58.5 mm (2.3 in) |
| 1899 | 74.8 mm (2.9 in) |
| 1900 | 221.5 mm (8.7 in) |
| 1901 | 94.3 mm (3.7 in) |
| 1902 | 108.0 mm (4.3 in) |
| 1903 | 88.9 mm (3.5 in) |
| 1904 | 58.5 mm (2.3 in) |
| 1905 | 169.0 mm (6.7 in) |
| 1906 | 144.7 mm (5.7 in) |
| 1907 | 95.2 mm (3.7 in) |
| 1908 | 92.0 mm (3.6 in) |
| 1909 | 151.6 mm (6.0 in) |
| 1910 | 73.3 mm (2.9 in) |
| 1911 | 91.5 mm (3.6 in) |
| 1912 | 80.7 mm (3.2 in) |
| 1913 | 81.8 mm (3.2 in) |
| 1914 | 129.3 mm (5.1 in) |
| 1915 | 74.7 mm (2.9 in) |
| 1916 | 65.8 mm (2.6 in) |
| 1917 | 70.9 mm (2.8 in) |
| 1918 | 71.6 mm (2.8 in) |
| 1919 | 125.4 mm (4.9 in) |
| 1920 | 54.8 mm (2.2 in) |
| 1921 | 87.9 mm (3.5 in) |
| 1922 | 92.2 mm (3.6 in) |
| 1923 | 102.9 mm (4.1 in) |
| 1924 | 64.0 mm (2.5 in) |
| 1925 | 83.0 mm (3.3 in) |
| 1926 | 88.4 mm (3.5 in) |
| 1927 | 85.8 mm (3.4 in) |
| 1928 | 63.3 mm (2.5 in) |
| 1929 | 53.6 mm (2.1 in) |
| 1930 | 134.8 mm (5.3 in) |
| 1931 | 49.5 mm (1.9 in) |
| 1932 | 85.4 mm (3.4 in) |
| 1933 | 85.1 mm (3.4 in) |
| 1934 | 167.2 mm (6.6 in) |
| 1935 | 59.0 mm (2.3 in) |
| 1936 | 55.1 mm (2.2 in) |
| 1937 | 65.0 mm (2.6 in) |
| 1938 | 124.7 mm (4.9 in) |
| 1939 | 59.7 mm (2.4 in) |
| 1940 | 116.4 mm (4.6 in) |
| 1941 | 118.3 mm (4.7 in) |
| 1942 | 77.5 mm (3.1 in) |
| 1943 | 81.9 mm (3.2 in) |
| 1944 | 73.7 mm (2.9 in) |
| 1945 | 84.4 mm (3.3 in) |
| 1946 | 111.3 mm (4.4 in) |
| 1947 | 45.2 mm (1.8 in) |
| 1948 | 70.6 mm (2.8 in) |
| 1949 | 150.3 mm (5.9 in) |
| 1950 | 157.5 mm (6.2 in) |
| 1951 | 121.4 mm (4.8 in) |
| 1952 | 116.6 mm (4.6 in) |
| 1953 | 110.2 mm (4.3 in) |
| 1954 | 106.6 mm (4.2 in) |
| 1955 | 55.1 mm (2.2 in) |
| 1956 | 33.0 mm (1.3 in) |
| 1957 | 79.6 mm (3.1 in) |
| 1958 | 42.2 mm (1.7 in) |
| 1959 | 89.5 mm (3.5 in) |
| 1960 | 89.2 mm (3.5 in) |
| 1961 | 88.4 mm (3.5 in) |
| 1962 | 72.7 mm (2.9 in) |
| 1963 | 48.8 mm (1.9 in) |
| 1964 | 91.4 mm (3.6 in) |
| 1965 | 98.1 mm (3.9 in) |
| 1966 | 47.2 mm (1.9 in) |
| 1967 | 102.4 mm (4.0 in) |
| 1968 | 118.9 mm (4.7 in) |
| 1969 | 130.8 mm (5.1 in) |
| 1970 | 61.1 mm (2.4 in) |
| 1971 | 149.4 mm (5.9 in) |
| 1972 | 91.2 mm (3.6 in) |
| 1973 | 95.0 mm (3.7 in) |
| 1974 | 81.0 mm (3.2 in) |
| 1975 | 55.4 mm (2.2 in) |
| 1976 | 59.0 mm (2.3 in) |
| 1977 | 60.9 mm (2.4 in) |
| 1978 | 137.9 mm (5.4 in) |
| 1979 | 108.2 mm (4.3 in) |
| 1980 | 64.5 mm (2.5 in) |
| 1981 | 69.4 mm (2.7 in) |
| 1982 | 73.3 mm (2.9 in) |
| 1983 | 103.2 mm (4.1 in) |
| 1984 | 87.2 mm (3.4 in) |
| 1985 | 222.8 mm (8.8 in) |
| 1986 | 79.7 mm (3.1 in) |
| 1987 | 94.8 mm (3.7 in) |
| 1988 | 150.9 mm (5.9 in) |
| 1989 | 75.4 mm (3.0 in) |
| 1990 | 86.6 mm (3.4 in) |
| 1991 | 61.9 mm (2.4 in) |
| 1992 | 120.7 mm (4.8 in) |
| 1993 | 64.3 mm (2.5 in) |
| 1994 | 70.6 mm (2.8 in) |
| 1995 | 58.4 mm (2.3 in) |
| 1996 | 158.5 mm (6.2 in) |
| 1997 | 24.7 mm (1.0 in) |
| 1998 | 85.9 mm (3.4 in) |
| 1999 | 84.6 mm (3.3 in) |
| 2000 | 62.5 mm (2.5 in) |
| 2001 | 82.0 mm (3.2 in) |
| 2002 | 74.7 mm (2.9 in) |
| 2003 | 88.1 mm (3.5 in) |
| 2004 | 163.5 mm (6.4 in) |
| 2005 | 117.3 mm (4.6 in) |
| 2006 | 125.0 mm (4.9 in) |
| 2007 | 113.8 mm (4.5 in) |
| 2008 | 88.4 mm (3.5 in) |
| 2009 | 103.2 mm (4.1 in) |
| 2010 | 120.9 mm (4.8 in) |
| 2011 | 66.8 mm (2.6 in) |
| 2012 | 70.9 mm (2.8 in) |
| 2013 | 123.7 mm (4.9 in) |
| 2014 | 154.0 mm (6.1 in) |
| 2015 | 168.2 mm (6.6 in) |
| 2016 | 101.1 mm (4.0 in) |
| 2017 | 110.2 mm (4.3 in) |
| 2018 | 81.0 mm (3.2 in) |
| 2019 | 82.4 mm (3.2 in) |
| 2020 | 38.8 mm (1.5 in) |
| 2021 | 71.9 mm (2.8 in) |
| 2022 | 50.5 mm (2.0 in) |
| 2023 | 97.7 mm (3.8 in) |
| 2024 | 87.9 mm (3.5 in) |
| 2025 | 83.5 mm (3.3 in) |
| 2026 | 126.5 mm (5.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1896 | 34 days |
| 1897 | 36 days |
| 1898 | 27 days |
| 1899 | 33 days |
| 1900 | 31 days |
| 1901 | 30 days |
| 1902 | 31 days |
| 1903 | 42 days |
| 1904 | 45 days |
| 1905 | 32 days |
| 1906 | 27 days |
| 1907 | 37 days |
| 1908 | 30 days |
| 1909 | 17 days |
| 1910 | 41 days |
| 1911 | 37 days |
| 1912 | 31 days |
| 1913 | 51 days |
| 1914 | 45 days |
| 1915 | 31 days |
| 1916 | 28 days |
| 1917 | 29 days |
| 1918 | 22 days |
| 1919 | 28 days |
| 1920 | 26 days |
| 1921 | 35 days |
| 1922 | 23 days |
| 1923 | 47 days |
| 1924 | 42 days |
| 1925 | 39 days |
| 1926 | 24 days |
| 1927 | 34 days |
| 1928 | 28 days |
| 1929 | 23 days |
| 1930 | 30 days |
| 1931 | 41 days |
| 1932 | 30 days |
| 1933 | 31 days |
| 1934 | 50 days |
| 1935 | 28 days |
| 1936 | 24 days |
| 1937 | 30 days |
| 1938 | 28 days |
| 1939 | 28 days |
| 1940 | 26 days |
| 1941 | 21 days |
| 1942 | 37 days |
| 1943 | 36 days |
| 1944 | 32 days |
| 1945 | 37 days |
| 1946 | 29 days |
| 1947 | 24 days |
| 1948 | 30 days |
| 1949 | 48 days |
| 1950 | 31 days |
| 1951 | 17 days |
| 1952 | 63 days |
| 1953 | 24 days |
| 1954 | 30 days |
| 1955 | 20 days |
| 1956 | 20 days |
| 1957 | 18 days |
| 1958 | 39 days |
| 1959 | 20 days |
| 1960 | 36 days |
| 1961 | 30 days |
| 1962 | 53 days |
| 1963 | 47 days |
| 1964 | 34 days |
| 1965 | 22 days |
| 1966 | 52 days |
| 1967 | 42 days |
| 1968 | 55 days |
| 1969 | 18 days |
| 1970 | 32 days |
| 1971 | 41 days |
| 1972 | 22 days |
| 1973 | 19 days |
| 1974 | 31 days |
| 1975 | 31 days |
| 1976 | 41 days |
| 1977 | 24 days |
| 1978 | 19 days |
| 1979 | 30 days |
| 1980 | 34 days |
| 1981 | 30 days |
| 1982 | 19 days |
| 1983 | 27 days |
| 1984 | 19 days |
| 1985 | 37 days |
| 1986 | 35 days |
| 1987 | 36 days |
| 1988 | 30 days |
| 1989 | 56 days |
| 1990 | 20 days |
| 1991 | 24 days |
| 1992 | 23 days |
| 1993 | 28 days |
| 1994 | 41 days |
| 1995 | 25 days |
| 1996 | 41 days |
| 1997 | 23 days |
| 1998 | 48 days |
| 1999 | 45 days |
| 2000 | 25 days |
| 2001 | 43 days |
| 2002 | 56 days |
| 2003 | 21 days |
| 2004 | 24 days |
| 2005 | 31 days |
| 2006 | 37 days |
| 2007 | 42 days |
| 2008 | 15 days |
| 2009 | 16 days |
| 2010 | 28 days |
| 2011 | 31 days |
| 2012 | 28 days |
| 2013 | 23 days |
| 2014 | 26 days |
| 2015 | 26 days |
| 2016 | 40 days |
| 2017 | 67 days |
| 2018 | 24 days |
| 2019 | 21 days |
| 2020 | 28 days |
| 2021 | 28 days |
| 2022 | 26 days |
| 2023 | 26 days |
| 2024 | 61 days |
| 2025 | 27 days |
| 2026 | 60 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
123 years with a frostAcross 123 years with a frost, the median last spring frost at Le Mars falls on 3 May and the median first autumn frost on 2 October, which leaves a median of 152 days between them.
In 1994 to 2025 the median growing season was 163 days. That is 22 days more than in 1897 to 1929.
Fitted over all years, the growing season changes by +2.0 days per decade at this station.
| Measure | Median, all years | Earliest period (1897 to 1929) | Recent period (1994 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 3 May | 12 May | 29 April | 13 days earlier | -1.3 days per decade |
| First autumn frost | 2 October | 28 September | 7 October | 9 days later | +0.7 days per decade |
| Growing days | 152 days | 141 days | 163 days | 22 days more | +2.0 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
119 years, 1897 to 2025A day with at least 56.9 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 166.7 mm (6.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 56.9 mm (2.2 in) | |
| 5 years | 79.6 mm (3.1 in) | |
| 10 years | 97.0 mm (3.8 in) | |
| 25 years | 122.1 mm (4.8 in) | |
| 50 years | 143.3 mm (5.6 in) | |
| 100 years | 166.7 mm (6.6 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 119 years of values from 1897 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: 222.5 mm (8.8 in) in 1985; 139.7 mm (5.5 in) in 1900; 139.7 mm (5.5 in) in 2015.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Le Mars had a mean temperature of 8.9 C (48.1 F) and 776.7 mm (30.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Guttenberg L&D 10 (United States, 412 km away), Perry (United States, 198 km away) and Prairie du Chien (United States, 409 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Guttenberg L&D 10 | United States | 412 km (256 mi) | 9.0 C (48.2 F) | 797.5 mm (31.4 in) | 0.81 |
| Perry | United States | 198 km (123 mi) | 8.8 C (47.8 F) | 804.7 mm (31.7 in) | 0.83 |
| Prairie du Chien | United States | 409 km (254 mi) | 9.0 C (48.2 F) | 776.5 mm (30.6 in) | 0.83 |
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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-16).