Lewistown AP Weather Records (USW00024036)
Record envelope, standing records and threshold days for Lewistown AP (USW00024036), Montana, United States, with 131 years of record.
Key Facts for Lewistown AP
- Lewistown AP (USW00024036) is a weather station in Montana, United States at 47.05 latitude and -109.46 longitude, 1,257 m (4,125 ft) above sea level.
- The station reports from 1896 to 2026, 131 years of record.
- 1,464 records set at Lewistown AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Lewistown AP tied a daily record low minimum temperature of 3.3 C (37.9 F) on 4 August 2026.
About the Station
- Location: Montana, United States, 47.05 latitude, -109.46 longitude.
- Elevation: 1,257 m (4,125 ft).
- Period of record: 1896 to 2026, 131 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
12 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 22.8 C (73.0 F) | -43.3 C (-45.9 F) | 17.8 C (64.0 F) | -26.1 C (-15.0 F) |
| Feb | 21.1 C (70.0 F) | -41.1 C (-42.0 F) | 20.0 C (68.0 F) | -22.2 C (-8.0 F) |
| Mar | 25.0 C (77.0 F) | -36.6 C (-33.9 F) | 23.3 C (73.9 F) | -23.3 C (-9.9 F) |
| Apr | 31.7 C (89.1 F) | -27.2 C (-17.0 F) | 26.7 C (80.1 F) | -6.7 C (19.9 F) |
| May | 36.7 C (98.1 F) | -11.7 C (10.9 F) | 30.6 C (87.1 F) | -7.8 C (18.0 F) |
| Jun | 40.6 C (105.1 F) | -5.0 C (23.0 F) | 28.3 C (82.9 F) | 2.2 C (36.0 F) |
| Jul | 40.6 C (105.1 F) | -2.8 C (27.0 F) | 38.3 C (100.9 F) | 7.8 C (46.0 F) |
| Aug | 39.4 C (102.9 F) | -2.8 C (27.0 F) | 38.3 C (100.9 F) | 3.3 C (37.9 F) |
| Sep | 37.8 C (100.0 F) | -14.4 C (6.1 F) | 30.6 C (87.1 F) | -0.6 C (30.9 F) |
| Oct | 33.3 C (91.9 F) | -23.3 C (-9.9 F) | 28.9 C (84.0 F) | 3.3 C (37.9 F) |
| Nov | 27.2 C (81.0 F) | -34.4 C (-29.9 F) | n/a | n/a |
| Dec | 23.3 C (73.9 F) | -41.1 C (-42.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1896 | 24 |
| 1897 | 5 |
| 1898 | 3 |
| 1900 | 19 |
| 1901 | 8 |
| 1902 | 15 |
| 1903 | 15 |
| 1904 | 9 |
| 1905 | 27 |
| 1906 | 15 |
| 1907 | 6 |
| 1908 | 18 |
| 1909 | 16 |
| 1910 | 23 |
| 1911 | 6 |
| 1912 | 5 |
| 1913 | 16 |
| 1914 | 9 |
| 1915 | 7 |
| 1916 | 22 |
| 1917 | 2 |
| 1918 | 22 |
| 1919 | 29 |
| 1920 | 5 |
| 1921 | 16 |
| 1922 | 12 |
| 1923 | 6 |
| 1924 | 16 |
| 1925 | 7 |
| 1926 | 11 |
| 1927 | 10 |
| 1928 | 20 |
| 1929 | 23 |
| 1930 | 20 |
| 1931 | 15 |
| 1932 | 9 |
| 1933 | 4 |
| 1934 | 13 |
| 1935 | 12 |
| 1936 | 45 |
| 1937 | 14 |
| 1938 | 5 |
| 1939 | 22 |
| 1940 | 4 |
| 1941 | 12 |
| 1942 | 4 |
| 1943 | 16 |
| 1944 | 6 |
| 1945 | 6 |
| 1946 | 2 |
| 1947 | 9 |
| 1948 | 5 |
| 1949 | 8 |
| 1950 | 21 |
| 1951 | 19 |
| 1952 | 5 |
| 1953 | 9 |
| 1954 | 16 |
| 1955 | 14 |
| 1956 | 14 |
| 1957 | 9 |
| 1958 | 8 |
| 1959 | 12 |
| 1960 | 10 |
| 1961 | 11 |
| 1962 | 4 |
| 1963 | 7 |
| 1964 | 7 |
| 1965 | 12 |
| 1966 | 11 |
| 1967 | 7 |
| 1968 | 11 |
| 1969 | 18 |
| 1970 | 4 |
| 1971 | 5 |
| 1972 | 14 |
| 1973 | 15 |
| 1974 | 7 |
| 1975 | 13 |
| 1976 | 6 |
| 1977 | 3 |
| 1978 | 8 |
| 1979 | 6 |
| 1980 | 9 |
| 1981 | 10 |
| 1982 | 9 |
| 1983 | 21 |
| 1984 | 7 |
| 1985 | 28 |
| 1986 | 14 |
| 1987 | 13 |
| 1988 | 11 |
| 1989 | 17 |
| 1990 | 10 |
| 1991 | 8 |
| 1992 | 12 |
| 1993 | 7 |
| 1994 | 9 |
| 1995 | 13 |
| 1996 | 5 |
| 1997 | 10 |
| 1998 | 3 |
| 1999 | 7 |
| 2000 | 6 |
| 2001 | 6 |
| 2002 | 14 |
| 2003 | 10 |
| 2004 | 4 |
| 2005 | 14 |
| 2006 | 8 |
| 2007 | 12 |
| 2008 | 11 |
| 2009 | 8 |
| 2010 | 7 |
| 2011 | 3 |
| 2012 | 10 |
| 2013 | 4 |
| 2014 | 8 |
| 2015 | 15 |
| 2016 | 9 |
| 2017 | 14 |
| 2018 | 4 |
| 2019 | 11 |
| 2020 | 11 |
| 2021 | 21 |
| 2022 | 12 |
| 2023 | 8 |
| 2024 | 10 |
| 2025 | 8 |
| 2026 | 9 |
All-Time Record Progression
10 new records| Date | Kind | Detail |
|---|---|---|
| 1929-01-28 | Record low minimum temperature | Record low minimum temperature -43.3 C (-45.9 F) |
| 1978-01-26 | Record snow depth | Record snow depth 66.0 cm (26.0 in) |
| 1978-01-27 | Record snow depth | Record snow depth 71.1 cm (28.0 in) |
| 1978-01-28 | Record snow depth | Record snow depth 76.2 cm (30.0 in) |
| 1978-01-29 | Record snow depth | Record snow depth 78.7 cm (31.0 in) |
| 1978-01-30 | Record snow depth | Record snow depth 81.3 cm (32.0 in) |
| 1978-02-01 | Record snow depth | Record snow depth 83.8 cm (33.0 in) |
| 1982-05-29 | Record daily snowfall | Record daily snowfall 53.6 cm (21.1 in) |
| 2014-08-23 | Record daily precipitation | Record daily precipitation 84.8 mm (3.3 in) |
| 2024-09-18 | Record daily precipitation | Record daily precipitation 110.5 mm (4.4 in) |
Wettest Day of Each Month
Sep: 110.5 mm (4.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 22.1 mm (0.9 in) | 25 January 1978 |
| Feb | 21.8 mm (0.9 in) | 5 February 1979 |
| Mar | 31.8 mm (1.3 in) | 25 March 1995 |
| Apr | 43.9 mm (1.7 in) | 16 April 1927 |
| May | 71.4 mm (2.8 in) | 20 May 1962 |
| Jun | 78.7 mm (3.1 in) | 6 June 1906 |
| Jul | 71.1 mm (2.8 in) | 13 July 1907 |
| Aug | 84.8 mm (3.3 in) | 23 August 2014 |
| Sep | 110.5 mm (4.4 in) | 18 September 2024 |
| Oct | 57.2 mm (2.3 in) | 21 October 1953 |
| Nov | 45.7 mm (1.8 in) | 24 November 1896 |
| Dec | 38.1 mm (1.5 in) | 10 December 1949 |
Period of Record Coverage
1896 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1896 | 342 | 93% | Yes |
| 1897 | 267 | 73% | No |
| 1898 | 179 | 49% | No |
| 1899 | 24 | 7% | No |
| 1900 | 329 | 90% | Yes |
| 1901 | 349 | 96% | Yes |
| 1902 | 287 | 79% | No |
| 1903 | 364 | 100% | Yes |
| 1904 | 364 | 99% | Yes |
| 1905 | 361 | 99% | Yes |
| 1906 | 355 | 97% | Yes |
| 1907 | 357 | 98% | Yes |
| 1908 | 353 | 96% | Yes |
| 1909 | 345 | 95% | Yes |
| 1910 | 357 | 98% | Yes |
| 1911 | 359 | 98% | Yes |
| 1912 | 305 | 83% | No |
| 1913 | 352 | 96% | Yes |
| 1914 | 349 | 96% | Yes |
| 1915 | 335 | 92% | Yes |
| 1916 | 342 | 93% | Yes |
| 1917 | 42 | 12% | No |
| 1918 | 331 | 91% | Yes |
| 1919 | 365 | 100% | Yes |
| 1920 | 366 | 100% | Yes |
| 1921 | 364 | 100% | Yes |
| 1922 | 360 | 99% | Yes |
| 1923 | 291 | 80% | No |
| 1924 | 318 | 87% | No |
| 1925 | 361 | 99% | Yes |
| 1926 | 364 | 100% | Yes |
| 1927 | 360 | 99% | Yes |
| 1928 | 364 | 99% | Yes |
| 1929 | 360 | 99% | Yes |
| 1930 | 357 | 98% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 363 | 99% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 364 | 99% | Yes |
| 1941 | 360 | 99% | Yes |
| 1942 | 347 | 95% | Yes |
| 1943 | 360 | 99% | Yes |
| 1944 | 365 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 363 | 99% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 363 | 99% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 364 | 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 | 365 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 365 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 364 | 100% | Yes |
| 1991 | 364 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 364 | 99% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 331 | 90% | Yes |
| 2001 | 334 | 92% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 364 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 364 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 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 | 364 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 362 | 99% | Yes |
| 2026 | 276 | 76% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 4 August 2026 | Lewistown AP, US | daily low min (Tie) | 3.3 C (37.9 F) | tie | 88 years | 9 of 100 (Routine) |
| 1 August 2026 | Lewistown AP, US | daily high max | 38.3 C (100.9 F) | 2.2 C (4.0 F) | 4 years | 15 of 100 (Routine) |
| 14 July 2026 | Lewistown AP, US | daily rain | 37.8 mm (1.5 in) | 22.1 mm (0.9 in) | 76 years | 63 of 100 (Major) |
| 12 July 2026 | Lewistown AP, US | daily high max | 38.3 C (100.9 F) | 1.1 C (2.0 F) | 24 years | 19 of 100 (Routine) |
| 28 June 2026 | Lewistown AP, US | daily rain | 29.0 mm (1.1 in) | 3.3 mm (0.13 in) | 84 years | 38 of 100 (Notable) |
| 20 March 2026 | Lewistown AP, US | monthly high min (Tie) | 8.9 C (48.0 F) | tie | 11 years | 5 of 100 (Routine) |
| 19 March 2026 | Lewistown AP, US | daily high max | 21.7 C (71.1 F) | 2.3 C (4.1 F) | 116 years | 43 of 100 (Notable) |
| 19 March 2026 | Lewistown AP, US | daily high min | 7.8 C (46.0 F) | 0.6 C (1.1 F) | 28 years | 18 of 100 (Routine) |
| 17 March 2026 | Lewistown AP, US | daily high min (Tie) | 4.4 C (39.9 F) | tie | 53 years | 6 of 100 (Routine) |
| 13 March 2026 | Lewistown AP, US | daily rain | 14.0 mm (0.6 in) | 1.3 mm (0.05 in) | 129 years | 20 of 100 (Routine) |
| 12 March 2026 | Lewistown AP, US | daily rain | 14.7 mm (0.6 in) | 6.6 mm (0.26 in) | 72 years | 20 of 100 (Routine) |
| 8 March 2026 | Lewistown AP, US | daily high max | 18.3 C (64.9 F) | 1.6 C (2.9 F) | 120 years | 42 of 100 (Notable) |
| 7 March 2026 | Lewistown AP, US | daily high max (Tie) | 15.6 C (60.1 F) | tie | 40 years | 5 of 100 (Routine) |
| 9 February 2026 | Lewistown AP, US | daily rain | 21.3 mm (0.8 in) | 4.3 mm (0.17 in) | 92 years | 20 of 100 (Routine) |
| 6 February 2026 | Lewistown AP, US | daily high max | 20.0 C (68.0 F) | 1.1 C (2.0 F) | 39 years | 22 of 100 (Routine) |
| 5 February 2026 | Lewistown AP, US | daily high max | 19.4 C (66.9 F) | 3.8 C (6.8 F) | 84 years | 39 of 100 (Notable) |
| 4 February 2026 | Lewistown AP, US | daily high max (Tie) | 16.7 C (62.1 F) | tie | 84 years | 8 of 100 (Routine) |
| 14 January 2026 | Lewistown AP, US | daily high max | 17.8 C (64.0 F) | 1.7 C (3.1 F) | 20 years | 17 of 100 (Routine) |
| 3 January 2026 | Lewistown AP, US | daily high max (Tie) | 13.3 C (55.9 F) | tie | 44 years | 5 of 100 (Routine) |
| 1 January 2026 | Lewistown AP, US | daily high max (Tie) | 12.8 C (55.0 F) | tie | 87 years | 9 of 100 (Routine) |
Climate Trend
115 complete years, 1896 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1896 | 4.9 C | -1.06 C |
| 1901 | 6.5 C | +0.60 C |
| 1903 | 5.7 C | -0.28 C |
| 1904 | 6.3 C | +0.36 C |
| 1905 | 6.4 C | +0.46 C |
| 1906 | 6.9 C | +0.97 C |
| 1907 | 5.6 C | -0.39 C |
| 1908 | 6.8 C | +0.85 C |
| 1909 | 5.0 C | -0.99 C |
| 1910 | 6.9 C | +0.98 C |
| 1911 | 4.7 C | -1.22 C |
| 1913 | 4.3 C | -1.65 C |
| 1914 | 6.0 C | +0.09 C |
| 1915 | 5.9 C | -0.06 C |
| 1916 | 3.8 C | -2.17 C |
| 1919 | 6.2 C | +0.27 C |
| 1920 | 5.8 C | -0.14 C |
| 1921 | 6.8 C | +0.88 C |
| 1922 | 5.7 C | -0.20 C |
| 1925 | 7.6 C | +1.64 C |
| 1926 | 7.0 C | +1.04 C |
| 1927 | 4.7 C | -1.27 C |
| 1928 | 5.9 C | -0.03 C |
| 1929 | 3.9 C | -2.00 C |
| 1931 | 8.1 C | +2.13 C |
| 1932 | 5.8 C | -0.16 C |
| 1933 | 6.7 C | +0.75 C |
| 1934 | 8.1 C | +2.18 C |
| 1935 | 6.1 C | +0.18 C |
| 1936 | 6.0 C | +0.05 C |
| 1937 | 5.6 C | -0.30 C |
| 1938 | 7.0 C | +1.01 C |
| 1939 | 7.5 C | +1.53 C |
| 1940 | 6.2 C | +0.25 C |
| 1941 | 6.7 C | +0.74 C |
| 1944 | 5.8 C | -0.13 C |
| 1945 | 5.1 C | -0.87 C |
| 1946 | 5.8 C | -0.10 C |
| 1947 | 5.5 C | -0.48 C |
| 1948 | 4.9 C | -1.03 C |
| 1949 | 4.8 C | -1.12 C |
| 1950 | 4.0 C | -1.95 C |
| 1951 | 3.2 C | -2.77 C |
| 1952 | 5.9 C | -0.05 C |
| 1953 | 7.2 C | +1.27 C |
| 1954 | 5.8 C | -0.10 C |
| 1955 | 4.3 C | -1.68 C |
| 1956 | 6.1 C | +0.12 C |
| 1957 | 5.3 C | -0.62 C |
| 1958 | 6.6 C | +0.62 C |
| 1959 | 5.3 C | -0.66 C |
| 1960 | 6.0 C | +0.05 C |
| 1961 | 7.0 C | +1.03 C |
| 1962 | 5.7 C | -0.23 C |
| 1963 | 6.8 C | +0.90 C |
| 1964 | 5.1 C | -0.88 C |
| 1965 | 4.5 C | -1.40 C |
| 1966 | 5.6 C | -0.36 C |
| 1967 | 5.7 C | -0.20 C |
| 1968 | 5.2 C | -0.70 C |
| 1969 | 4.7 C | -1.25 C |
| 1970 | 5.2 C | -0.70 C |
| 1971 | 5.2 C | -0.76 C |
| 1972 | 5.0 C | -0.91 C |
| 1973 | 6.8 C | +0.90 C |
| 1974 | 6.9 C | +0.98 C |
| 1975 | 4.2 C | -1.78 C |
| 1976 | 6.5 C | +0.58 C |
| 1977 | 5.1 C | -0.81 C |
| 1978 | 3.5 C | -2.46 C |
| 1979 | 4.8 C | -1.11 C |
| 1980 | 6.1 C | +0.16 C |
| 1981 | 7.3 C | +1.34 C |
| 1982 | 4.9 C | -1.02 C |
| 1983 | 6.7 C | +0.75 C |
| 1984 | 6.1 C | +0.15 C |
| 1985 | 4.4 C | -1.56 C |
| 1986 | 6.7 C | +0.77 C |
| 1987 | 7.4 C | +1.47 C |
| 1988 | 7.2 C | +1.30 C |
| 1989 | 5.5 C | -0.40 C |
| 1990 | 7.0 C | +1.10 C |
| 1991 | 7.3 C | +1.39 C |
| 1992 | 7.0 C | +1.05 C |
| 1993 | 4.6 C | -1.34 C |
| 1994 | 6.2 C | +0.26 C |
| 1995 | 5.6 C | -0.31 C |
| 1996 | 4.1 C | -1.85 C |
| 1997 | 5.8 C | -0.18 C |
| 1998 | 6.8 C | +0.89 C |
| 1999 | 7.0 C | +1.08 C |
| 2002 | 5.3 C | -0.69 C |
| 2003 | 6.8 C | +0.84 C |
| 2004 | 6.3 C | +0.33 C |
| 2005 | 6.4 C | +0.48 C |
| 2006 | 7.3 C | +1.40 C |
| 2007 | 6.7 C | +0.79 C |
| 2008 | 5.4 C | -0.57 C |
| 2009 | 5.3 C | -0.61 C |
| 2010 | 5.6 C | -0.39 C |
| 2011 | 5.5 C | -0.42 C |
| 2012 | 7.0 C | +1.05 C |
| 2013 | 6.0 C | +0.05 C |
| 2014 | 6.0 C | +0.05 C |
| 2015 | 8.1 C | +2.11 C |
| 2016 | 7.8 C | +1.84 C |
| 2017 | 6.5 C | +0.59 C |
| 2018 | 5.3 C | -0.69 C |
| 2019 | 4.2 C | -1.72 C |
| 2020 | 6.6 C | +0.62 C |
| 2021 | 6.8 C | +0.82 C |
| 2022 | 5.7 C | -0.22 C |
| 2023 | 7.1 C | +1.12 C |
| 2024 | 7.0 C | +1.09 C |
| 2025 | 6.7 C | +0.71 C |
The fitted trend in annual mean temperature here over 1896 to 2025 is 0.04 C (-0.02 to 0.09) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.06 F (-0.03 to 0.16) per decade. The slope is a straight line fitted to 115 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.04 C (-0.02 to 0.09) per decade | 0.06 F (-0.03 to 0.16) per decade | 1896 to 2025 | 115 | Not clearly different from zero |
| Mean daily maximum | -0.07 C (-0.13 to 0.00) per decade | -0.12 F (-0.24 to -0.01) per decade | 1896 to 2025 | 115 | Fall |
| Mean daily minimum | 0.1 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.3) per decade | 1896 to 2025 | 115 | Rise |
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1896 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.6 C (105.1 F) | 1900 | 36.1 C (97.0 F) | 131 |
| Coldest night (TNn) | -43.3 C (-45.9 F) | 1929 | -32.8 C (-27.0 F) | 131 |
| Wettest day (Rx1day) | 110.5 mm (4.4 in) | 2024 | 33.5 mm (1.3 in) | 131 |
| Wettest five days (Rx5day) | 140.1 mm (5.5 in) | 1932 | 58.4 mm (2.3 in) | 131 |
| Longest dry spell (CDD) | 74 days | 1901 | 27 days | 131 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1896 | 34.4 C (93.9 F) |
| 1897 | 35.0 C (95.0 F) |
| 1898 | 32.2 C (90.0 F) |
| 1899 | 8.9 C (48.0 F) |
| 1900 | 40.6 C (105.1 F) |
| 1901 | 36.1 C (97.0 F) |
| 1902 | 32.2 C (90.0 F) |
| 1903 | 35.0 C (95.0 F) |
| 1904 | 35.0 C (95.0 F) |
| 1905 | 35.6 C (96.1 F) |
| 1906 | 36.7 C (98.1 F) |
| 1907 | 33.3 C (91.9 F) |
| 1908 | 39.4 C (102.9 F) |
| 1909 | 37.2 C (99.0 F) |
| 1910 | 36.7 C (98.1 F) |
| 1911 | 33.3 C (91.9 F) |
| 1912 | 31.7 C (89.1 F) |
| 1913 | 33.9 C (93.0 F) |
| 1914 | 37.2 C (99.0 F) |
| 1915 | 36.1 C (97.0 F) |
| 1916 | 33.9 C (93.0 F) |
| 1917 | 7.2 C (45.0 F) |
| 1918 | 36.1 C (97.0 F) |
| 1919 | 37.2 C (99.0 F) |
| 1920 | 35.0 C (95.0 F) |
| 1921 | 35.6 C (96.1 F) |
| 1922 | 35.0 C (95.0 F) |
| 1923 | 33.3 C (91.9 F) |
| 1924 | 37.8 C (100.0 F) |
| 1925 | 37.2 C (99.0 F) |
| 1926 | 37.2 C (99.0 F) |
| 1927 | 35.0 C (95.0 F) |
| 1928 | 36.1 C (97.0 F) |
| 1929 | 38.3 C (100.9 F) |
| 1930 | 37.2 C (99.0 F) |
| 1931 | 40.0 C (104.0 F) |
| 1932 | 36.1 C (97.0 F) |
| 1933 | 38.3 C (100.9 F) |
| 1934 | 36.7 C (98.1 F) |
| 1935 | 36.7 C (98.1 F) |
| 1936 | 37.2 C (99.0 F) |
| 1937 | 36.7 C (98.1 F) |
| 1938 | 33.3 C (91.9 F) |
| 1939 | 37.8 C (100.0 F) |
| 1940 | 38.3 C (100.9 F) |
| 1941 | 36.1 C (97.0 F) |
| 1942 | 34.4 C (93.9 F) |
| 1943 | 35.0 C (95.0 F) |
| 1944 | 32.2 C (90.0 F) |
| 1945 | 36.7 C (98.1 F) |
| 1946 | 34.4 C (93.9 F) |
| 1947 | 37.8 C (100.0 F) |
| 1948 | 35.6 C (96.1 F) |
| 1949 | 38.3 C (100.9 F) |
| 1950 | 33.3 C (91.9 F) |
| 1951 | 35.0 C (95.0 F) |
| 1952 | 34.4 C (93.9 F) |
| 1953 | 37.2 C (99.0 F) |
| 1954 | 35.6 C (96.1 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 35.0 C (95.0 F) |
| 1957 | 36.7 C (98.1 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 34.4 C (93.9 F) |
| 1960 | 37.2 C (99.0 F) |
| 1961 | 39.4 C (102.9 F) |
| 1962 | 32.8 C (91.0 F) |
| 1963 | 37.2 C (99.0 F) |
| 1964 | 36.1 C (97.0 F) |
| 1965 | 34.4 C (93.9 F) |
| 1966 | 36.1 C (97.0 F) |
| 1967 | 35.6 C (96.1 F) |
| 1968 | 33.9 C (93.0 F) |
| 1969 | 38.3 C (100.9 F) |
| 1970 | 36.1 C (97.0 F) |
| 1971 | 38.3 C (100.9 F) |
| 1972 | 33.9 C (93.0 F) |
| 1973 | 36.7 C (98.1 F) |
| 1974 | 34.4 C (93.9 F) |
| 1975 | 34.4 C (93.9 F) |
| 1976 | 36.7 C (98.1 F) |
| 1977 | 32.8 C (91.0 F) |
| 1978 | 32.8 C (91.0 F) |
| 1979 | 35.0 C (95.0 F) |
| 1980 | 34.4 C (93.9 F) |
| 1981 | 34.4 C (93.9 F) |
| 1982 | 34.4 C (93.9 F) |
| 1983 | 38.9 C (102.0 F) |
| 1984 | 36.1 C (97.0 F) |
| 1985 | 36.1 C (97.0 F) |
| 1986 | 33.9 C (93.0 F) |
| 1987 | 35.0 C (95.0 F) |
| 1988 | 35.6 C (96.1 F) |
| 1989 | 34.4 C (93.9 F) |
| 1990 | 37.2 C (99.0 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 33.9 C (93.0 F) |
| 1993 | 34.4 C (93.9 F) |
| 1994 | 33.9 C (93.0 F) |
| 1995 | 35.0 C (95.0 F) |
| 1996 | 35.0 C (95.0 F) |
| 1997 | 32.8 C (91.0 F) |
| 1998 | 35.0 C (95.0 F) |
| 1999 | 36.1 C (97.0 F) |
| 2000 | 36.1 C (97.0 F) |
| 2001 | 37.2 C (99.0 F) |
| 2002 | 38.3 C (100.9 F) |
| 2003 | 37.8 C (100.0 F) |
| 2004 | 35.6 C (96.1 F) |
| 2005 | 35.0 C (95.0 F) |
| 2006 | 36.1 C (97.0 F) |
| 2007 | 36.7 C (98.1 F) |
| 2008 | 37.2 C (99.0 F) |
| 2009 | 33.3 C (91.9 F) |
| 2010 | 36.1 C (97.0 F) |
| 2011 | 36.7 C (98.1 F) |
| 2012 | 35.6 C (96.1 F) |
| 2013 | 35.0 C (95.0 F) |
| 2014 | 36.1 C (97.0 F) |
| 2015 | 36.7 C (98.1 F) |
| 2016 | 37.2 C (99.0 F) |
| 2017 | 36.7 C (98.1 F) |
| 2018 | 38.3 C (100.9 F) |
| 2019 | 33.9 C (93.0 F) |
| 2020 | 36.1 C (97.0 F) |
| 2021 | 36.1 C (97.0 F) |
| 2022 | 38.3 C (100.9 F) |
| 2023 | 36.7 C (98.1 F) |
| 2024 | 37.8 C (100.0 F) |
| 2025 | 33.9 C (93.0 F) |
| 2026 | 38.3 C (100.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1896 | -33.3 C (-27.9 F) |
| 1897 | -34.4 C (-29.9 F) |
| 1898 | -28.3 C (-18.9 F) |
| 1899 | -26.1 C (-15.0 F) |
| 1900 | -34.4 C (-29.9 F) |
| 1901 | -29.4 C (-20.9 F) |
| 1902 | -33.3 C (-27.9 F) |
| 1903 | -30.0 C (-22.0 F) |
| 1904 | -30.0 C (-22.0 F) |
| 1905 | -36.1 C (-33.0 F) |
| 1906 | -31.7 C (-25.1 F) |
| 1907 | -31.7 C (-25.1 F) |
| 1908 | -31.7 C (-25.1 F) |
| 1909 | -38.3 C (-36.9 F) |
| 1910 | -37.8 C (-36.0 F) |
| 1911 | -35.0 C (-31.0 F) |
| 1912 | -34.4 C (-29.9 F) |
| 1913 | -32.8 C (-27.0 F) |
| 1914 | -33.9 C (-29.0 F) |
| 1915 | -30.0 C (-22.0 F) |
| 1916 | -40.6 C (-41.1 F) |
| 1917 | -40.0 C (-40.0 F) |
| 1918 | -37.8 C (-36.0 F) |
| 1919 | -37.8 C (-36.0 F) |
| 1920 | -32.2 C (-26.0 F) |
| 1921 | -32.8 C (-27.0 F) |
| 1922 | -32.2 C (-26.0 F) |
| 1923 | -35.6 C (-32.1 F) |
| 1924 | -38.3 C (-36.9 F) |
| 1925 | -28.3 C (-18.9 F) |
| 1926 | -30.6 C (-23.1 F) |
| 1927 | -40.0 C (-40.0 F) |
| 1928 | -33.3 C (-27.9 F) |
| 1929 | -43.3 C (-45.9 F) |
| 1930 | -24.4 C (-11.9 F) |
| 1931 | -22.2 C (-8.0 F) |
| 1932 | -33.3 C (-27.9 F) |
| 1933 | -36.1 C (-33.0 F) |
| 1934 | -27.8 C (-18.0 F) |
| 1935 | -33.9 C (-29.0 F) |
| 1936 | -41.1 C (-42.0 F) |
| 1937 | -34.4 C (-29.9 F) |
| 1938 | -34.4 C (-29.9 F) |
| 1939 | -37.2 C (-35.0 F) |
| 1940 | -34.4 C (-29.9 F) |
| 1941 | -35.6 C (-32.1 F) |
| 1942 | -36.1 C (-33.0 F) |
| 1943 | -28.3 C (-18.9 F) |
| 1944 | -28.3 C (-18.9 F) |
| 1945 | -33.3 C (-27.9 F) |
| 1946 | -30.0 C (-22.0 F) |
| 1947 | -31.7 C (-25.1 F) |
| 1948 | -30.0 C (-22.0 F) |
| 1949 | -36.1 C (-33.0 F) |
| 1950 | -35.6 C (-32.1 F) |
| 1951 | -33.3 C (-27.9 F) |
| 1952 | -32.8 C (-27.0 F) |
| 1953 | -22.2 C (-8.0 F) |
| 1954 | -35.6 C (-32.1 F) |
| 1955 | -30.6 C (-23.1 F) |
| 1956 | -35.0 C (-31.0 F) |
| 1957 | -36.7 C (-34.1 F) |
| 1958 | -27.2 C (-17.0 F) |
| 1959 | -33.9 C (-29.0 F) |
| 1960 | -32.2 C (-26.0 F) |
| 1961 | -30.0 C (-22.0 F) |
| 1962 | -33.3 C (-27.9 F) |
| 1963 | -36.7 C (-34.1 F) |
| 1964 | -35.0 C (-31.0 F) |
| 1965 | -32.8 C (-27.0 F) |
| 1966 | -33.9 C (-29.0 F) |
| 1967 | -29.4 C (-20.9 F) |
| 1968 | -40.6 C (-41.1 F) |
| 1969 | -38.9 C (-38.0 F) |
| 1970 | -28.3 C (-18.9 F) |
| 1971 | -35.0 C (-31.0 F) |
| 1972 | -36.7 C (-34.1 F) |
| 1973 | -29.4 C (-20.9 F) |
| 1974 | -31.7 C (-25.1 F) |
| 1975 | -28.9 C (-20.0 F) |
| 1976 | -31.7 C (-25.1 F) |
| 1977 | -32.8 C (-27.0 F) |
| 1978 | -36.7 C (-34.1 F) |
| 1979 | -33.3 C (-27.9 F) |
| 1980 | -34.4 C (-29.9 F) |
| 1981 | -31.1 C (-24.0 F) |
| 1982 | -31.7 C (-25.1 F) |
| 1983 | -41.1 C (-42.0 F) |
| 1984 | -32.8 C (-27.0 F) |
| 1985 | -34.4 C (-29.9 F) |
| 1986 | -31.1 C (-24.0 F) |
| 1987 | -27.2 C (-17.0 F) |
| 1988 | -27.8 C (-18.0 F) |
| 1989 | -38.3 C (-36.9 F) |
| 1990 | -36.7 C (-34.1 F) |
| 1991 | -28.3 C (-18.9 F) |
| 1992 | -29.4 C (-20.9 F) |
| 1993 | -30.0 C (-22.0 F) |
| 1994 | -36.1 C (-33.0 F) |
| 1995 | -28.3 C (-18.9 F) |
| 1996 | -36.1 C (-33.0 F) |
| 1997 | -33.3 C (-27.9 F) |
| 1998 | -32.2 C (-26.0 F) |
| 1999 | -22.2 C (-8.0 F) |
| 2000 | -28.3 C (-18.9 F) |
| 2001 | -23.9 C (-11.0 F) |
| 2002 | -29.4 C (-20.9 F) |
| 2003 | -28.3 C (-18.9 F) |
| 2004 | -32.2 C (-26.0 F) |
| 2005 | -32.2 C (-26.0 F) |
| 2006 | -34.4 C (-29.9 F) |
| 2007 | -27.2 C (-17.0 F) |
| 2008 | -33.9 C (-29.0 F) |
| 2009 | -34.4 C (-29.9 F) |
| 2010 | -27.2 C (-17.0 F) |
| 2011 | -31.1 C (-24.0 F) |
| 2012 | -28.3 C (-18.9 F) |
| 2013 | -33.8 C (-28.8 F) |
| 2014 | -36.0 C (-32.8 F) |
| 2015 | -24.9 C (-12.8 F) |
| 2016 | -33.8 C (-28.8 F) |
| 2017 | -27.7 C (-17.9 F) |
| 2018 | -31.6 C (-24.9 F) |
| 2019 | -36.6 C (-33.9 F) |
| 2020 | -26.6 C (-15.9 F) |
| 2021 | -37.1 C (-34.8 F) |
| 2022 | -34.3 C (-29.7 F) |
| 2023 | -29.3 C (-20.7 F) |
| 2024 | -41.6 C (-42.9 F) |
| 2025 | -32.1 C (-25.8 F) |
| 2026 | -26.1 C (-15.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1896 | 45.7 mm (1.8 in) |
| 1897 | 47.0 mm (1.9 in) |
| 1898 | 33.5 mm (1.3 in) |
| 1899 | 7.6 mm (0.30 in) |
| 1900 | 63.5 mm (2.5 in) |
| 1901 | 27.9 mm (1.1 in) |
| 1902 | 43.2 mm (1.7 in) |
| 1903 | 45.7 mm (1.8 in) |
| 1904 | 33.0 mm (1.3 in) |
| 1905 | 27.9 mm (1.1 in) |
| 1906 | 78.7 mm (3.1 in) |
| 1907 | 71.1 mm (2.8 in) |
| 1908 | 26.4 mm (1.0 in) |
| 1909 | 39.9 mm (1.6 in) |
| 1910 | 27.4 mm (1.1 in) |
| 1911 | 44.2 mm (1.7 in) |
| 1912 | 57.2 mm (2.3 in) |
| 1913 | 41.7 mm (1.6 in) |
| 1914 | 36.8 mm (1.4 in) |
| 1915 | 25.1 mm (1.0 in) |
| 1916 | 23.1 mm (0.9 in) |
| 1917 | 5.1 mm (0.20 in) |
| 1918 | 45.7 mm (1.8 in) |
| 1919 | 25.4 mm (1.0 in) |
| 1920 | 27.4 mm (1.1 in) |
| 1921 | 54.1 mm (2.1 in) |
| 1922 | 21.1 mm (0.8 in) |
| 1923 | 50.8 mm (2.0 in) |
| 1924 | 23.9 mm (0.9 in) |
| 1925 | 19.6 mm (0.8 in) |
| 1926 | 26.4 mm (1.0 in) |
| 1927 | 43.9 mm (1.7 in) |
| 1928 | 43.7 mm (1.7 in) |
| 1929 | 44.5 mm (1.8 in) |
| 1930 | 26.9 mm (1.1 in) |
| 1931 | 23.1 mm (0.9 in) |
| 1932 | 48.5 mm (1.9 in) |
| 1933 | 25.4 mm (1.0 in) |
| 1934 | 39.6 mm (1.6 in) |
| 1935 | 20.1 mm (0.8 in) |
| 1936 | 41.1 mm (1.6 in) |
| 1937 | 30.2 mm (1.2 in) |
| 1938 | 37.3 mm (1.5 in) |
| 1939 | 24.1 mm (0.9 in) |
| 1940 | 34.0 mm (1.3 in) |
| 1941 | 36.8 mm (1.4 in) |
| 1942 | 34.5 mm (1.4 in) |
| 1943 | 28.7 mm (1.1 in) |
| 1944 | 45.5 mm (1.8 in) |
| 1945 | 19.1 mm (0.8 in) |
| 1946 | 48.0 mm (1.9 in) |
| 1947 | 45.2 mm (1.8 in) |
| 1948 | 50.0 mm (2.0 in) |
| 1949 | 42.7 mm (1.7 in) |
| 1950 | 49.5 mm (1.9 in) |
| 1951 | 28.4 mm (1.1 in) |
| 1952 | 30.0 mm (1.2 in) |
| 1953 | 66.0 mm (2.6 in) |
| 1954 | 33.5 mm (1.3 in) |
| 1955 | 35.6 mm (1.4 in) |
| 1956 | 46.5 mm (1.8 in) |
| 1957 | 35.3 mm (1.4 in) |
| 1958 | 21.6 mm (0.9 in) |
| 1959 | 46.2 mm (1.8 in) |
| 1960 | 27.9 mm (1.1 in) |
| 1961 | 29.0 mm (1.1 in) |
| 1962 | 71.4 mm (2.8 in) |
| 1963 | 25.9 mm (1.0 in) |
| 1964 | 67.8 mm (2.7 in) |
| 1965 | 59.4 mm (2.3 in) |
| 1966 | 31.0 mm (1.2 in) |
| 1967 | 33.5 mm (1.3 in) |
| 1968 | 26.2 mm (1.0 in) |
| 1969 | 29.2 mm (1.1 in) |
| 1970 | 24.1 mm (0.9 in) |
| 1971 | 30.0 mm (1.2 in) |
| 1972 | 40.6 mm (1.6 in) |
| 1973 | 45.7 mm (1.8 in) |
| 1974 | 39.9 mm (1.6 in) |
| 1975 | 37.1 mm (1.5 in) |
| 1976 | 19.3 mm (0.8 in) |
| 1977 | 22.4 mm (0.9 in) |
| 1978 | 69.9 mm (2.8 in) |
| 1979 | 29.5 mm (1.2 in) |
| 1980 | 42.4 mm (1.7 in) |
| 1981 | 37.1 mm (1.5 in) |
| 1982 | 58.2 mm (2.3 in) |
| 1983 | 24.4 mm (1.0 in) |
| 1984 | 23.9 mm (0.9 in) |
| 1985 | 59.7 mm (2.4 in) |
| 1986 | 33.8 mm (1.3 in) |
| 1987 | 32.3 mm (1.3 in) |
| 1988 | 63.2 mm (2.5 in) |
| 1989 | 35.1 mm (1.4 in) |
| 1990 | 25.1 mm (1.0 in) |
| 1991 | 24.6 mm (1.0 in) |
| 1992 | 42.2 mm (1.7 in) |
| 1993 | 23.9 mm (0.9 in) |
| 1994 | 35.1 mm (1.4 in) |
| 1995 | 42.4 mm (1.7 in) |
| 1996 | 19.8 mm (0.8 in) |
| 1997 | 22.4 mm (0.9 in) |
| 1998 | 32.3 mm (1.3 in) |
| 1999 | 20.3 mm (0.8 in) |
| 2000 | 20.3 mm (0.8 in) |
| 2001 | 24.4 mm (1.0 in) |
| 2002 | 75.9 mm (3.0 in) |
| 2003 | 29.7 mm (1.2 in) |
| 2004 | 16.5 mm (0.6 in) |
| 2005 | 32.0 mm (1.3 in) |
| 2006 | 34.0 mm (1.3 in) |
| 2007 | 27.4 mm (1.1 in) |
| 2008 | 31.2 mm (1.2 in) |
| 2009 | 24.4 mm (1.0 in) |
| 2010 | 38.1 mm (1.5 in) |
| 2011 | 30.5 mm (1.2 in) |
| 2012 | 24.4 mm (1.0 in) |
| 2013 | 40.9 mm (1.6 in) |
| 2014 | 84.8 mm (3.3 in) |
| 2015 | 30.5 mm (1.2 in) |
| 2016 | 36.3 mm (1.4 in) |
| 2017 | 25.4 mm (1.0 in) |
| 2018 | 57.2 mm (2.3 in) |
| 2019 | 20.1 mm (0.8 in) |
| 2020 | 20.6 mm (0.8 in) |
| 2021 | 26.7 mm (1.1 in) |
| 2022 | 29.0 mm (1.1 in) |
| 2023 | 50.8 mm (2.0 in) |
| 2024 | 110.5 mm (4.4 in) |
| 2025 | 28.4 mm (1.1 in) |
| 2026 | 37.8 mm (1.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1896 | 63.5 mm (2.5 in) |
| 1897 | 47.0 mm (1.9 in) |
| 1898 | 67.2 mm (2.6 in) |
| 1899 | 7.6 mm (0.30 in) |
| 1900 | 86.4 mm (3.4 in) |
| 1901 | 44.5 mm (1.8 in) |
| 1902 | 66.0 mm (2.6 in) |
| 1903 | 109.2 mm (4.3 in) |
| 1904 | 40.7 mm (1.6 in) |
| 1905 | 58.4 mm (2.3 in) |
| 1906 | 100.3 mm (3.9 in) |
| 1907 | 114.3 mm (4.5 in) |
| 1908 | 40.6 mm (1.6 in) |
| 1909 | 56.6 mm (2.2 in) |
| 1910 | 41.9 mm (1.6 in) |
| 1911 | 67.4 mm (2.7 in) |
| 1912 | 67.6 mm (2.7 in) |
| 1913 | 80.8 mm (3.2 in) |
| 1914 | 56.9 mm (2.2 in) |
| 1915 | 56.2 mm (2.2 in) |
| 1916 | 40.4 mm (1.6 in) |
| 1917 | 6.9 mm (0.27 in) |
| 1918 | 51.3 mm (2.0 in) |
| 1919 | 37.6 mm (1.5 in) |
| 1920 | 52.6 mm (2.1 in) |
| 1921 | 90.4 mm (3.6 in) |
| 1922 | 36.7 mm (1.4 in) |
| 1923 | 111.7 mm (4.4 in) |
| 1924 | 36.1 mm (1.4 in) |
| 1925 | 38.0 mm (1.5 in) |
| 1926 | 55.4 mm (2.2 in) |
| 1927 | 97.3 mm (3.8 in) |
| 1928 | 76.5 mm (3.0 in) |
| 1929 | 55.9 mm (2.2 in) |
| 1930 | 29.0 mm (1.1 in) |
| 1931 | 33.2 mm (1.3 in) |
| 1932 | 140.1 mm (5.5 in) |
| 1933 | 71.9 mm (2.8 in) |
| 1934 | 71.4 mm (2.8 in) |
| 1935 | 28.7 mm (1.1 in) |
| 1936 | 55.8 mm (2.2 in) |
| 1937 | 63.2 mm (2.5 in) |
| 1938 | 86.5 mm (3.4 in) |
| 1939 | 45.7 mm (1.8 in) |
| 1940 | 70.5 mm (2.8 in) |
| 1941 | 63.3 mm (2.5 in) |
| 1942 | 65.0 mm (2.6 in) |
| 1943 | 55.5 mm (2.2 in) |
| 1944 | 127.2 mm (5.0 in) |
| 1945 | 44.7 mm (1.8 in) |
| 1946 | 75.9 mm (3.0 in) |
| 1947 | 63.5 mm (2.5 in) |
| 1948 | 84.6 mm (3.3 in) |
| 1949 | 84.3 mm (3.3 in) |
| 1950 | 72.7 mm (2.9 in) |
| 1951 | 47.4 mm (1.9 in) |
| 1952 | 59.9 mm (2.4 in) |
| 1953 | 118.6 mm (4.7 in) |
| 1954 | 72.1 mm (2.8 in) |
| 1955 | 74.5 mm (2.9 in) |
| 1956 | 62.0 mm (2.4 in) |
| 1957 | 50.1 mm (2.0 in) |
| 1958 | 43.4 mm (1.7 in) |
| 1959 | 74.1 mm (2.9 in) |
| 1960 | 51.5 mm (2.0 in) |
| 1961 | 44.4 mm (1.7 in) |
| 1962 | 130.4 mm (5.1 in) |
| 1963 | 57.9 mm (2.3 in) |
| 1964 | 111.5 mm (4.4 in) |
| 1965 | 78.3 mm (3.1 in) |
| 1966 | 41.8 mm (1.6 in) |
| 1967 | 70.3 mm (2.8 in) |
| 1968 | 52.1 mm (2.1 in) |
| 1969 | 70.6 mm (2.8 in) |
| 1970 | 54.6 mm (2.1 in) |
| 1971 | 43.7 mm (1.7 in) |
| 1972 | 72.7 mm (2.9 in) |
| 1973 | 79.2 mm (3.1 in) |
| 1974 | 85.8 mm (3.4 in) |
| 1975 | 80.2 mm (3.2 in) |
| 1976 | 30.9 mm (1.2 in) |
| 1977 | 47.3 mm (1.9 in) |
| 1978 | 95.6 mm (3.8 in) |
| 1979 | 30.5 mm (1.2 in) |
| 1980 | 59.4 mm (2.3 in) |
| 1981 | 75.5 mm (3.0 in) |
| 1982 | 112.1 mm (4.4 in) |
| 1983 | 49.5 mm (1.9 in) |
| 1984 | 28.7 mm (1.1 in) |
| 1985 | 86.6 mm (3.4 in) |
| 1986 | 71.0 mm (2.8 in) |
| 1987 | 42.2 mm (1.7 in) |
| 1988 | 65.2 mm (2.6 in) |
| 1989 | 43.5 mm (1.7 in) |
| 1990 | 36.6 mm (1.4 in) |
| 1991 | 39.9 mm (1.6 in) |
| 1992 | 55.9 mm (2.2 in) |
| 1993 | 54.8 mm (2.2 in) |
| 1994 | 60.5 mm (2.4 in) |
| 1995 | 67.8 mm (2.7 in) |
| 1996 | 40.4 mm (1.6 in) |
| 1997 | 49.3 mm (1.9 in) |
| 1998 | 71.2 mm (2.8 in) |
| 1999 | 38.4 mm (1.5 in) |
| 2000 | 41.6 mm (1.6 in) |
| 2001 | 43.4 mm (1.7 in) |
| 2002 | 91.1 mm (3.6 in) |
| 2003 | 42.7 mm (1.7 in) |
| 2004 | 48.0 mm (1.9 in) |
| 2005 | 65.5 mm (2.6 in) |
| 2006 | 58.8 mm (2.3 in) |
| 2007 | 50.2 mm (2.0 in) |
| 2008 | 108.4 mm (4.3 in) |
| 2009 | 31.3 mm (1.2 in) |
| 2010 | 82.6 mm (3.3 in) |
| 2011 | 81.8 mm (3.2 in) |
| 2012 | 43.0 mm (1.7 in) |
| 2013 | 140.0 mm (5.5 in) |
| 2014 | 118.6 mm (4.7 in) |
| 2015 | 43.8 mm (1.7 in) |
| 2016 | 64.3 mm (2.5 in) |
| 2017 | 47.5 mm (1.9 in) |
| 2018 | 58.0 mm (2.3 in) |
| 2019 | 36.5 mm (1.4 in) |
| 2020 | 38.7 mm (1.5 in) |
| 2021 | 39.4 mm (1.6 in) |
| 2022 | 59.1 mm (2.3 in) |
| 2023 | 81.6 mm (3.2 in) |
| 2024 | 126.5 mm (5.0 in) |
| 2025 | 32.3 mm (1.3 in) |
| 2026 | 47.4 mm (1.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1896 | 47 days |
| 1897 | 15 days |
| 1898 | 12 days |
| 1899 | 14 days |
| 1900 | 33 days |
| 1901 | 74 days |
| 1902 | 44 days |
| 1903 | 38 days |
| 1904 | 52 days |
| 1905 | 31 days |
| 1906 | 39 days |
| 1907 | 45 days |
| 1908 | 27 days |
| 1909 | 22 days |
| 1910 | 32 days |
| 1911 | 22 days |
| 1912 | 33 days |
| 1913 | 27 days |
| 1914 | 27 days |
| 1915 | 26 days |
| 1916 | 18 days |
| 1917 | 16 days |
| 1918 | 33 days |
| 1919 | 36 days |
| 1920 | 18 days |
| 1921 | 27 days |
| 1922 | 26 days |
| 1923 | 23 days |
| 1924 | 27 days |
| 1925 | 23 days |
| 1926 | 18 days |
| 1927 | 23 days |
| 1928 | 41 days |
| 1929 | 25 days |
| 1930 | 24 days |
| 1931 | 33 days |
| 1932 | 22 days |
| 1933 | 26 days |
| 1934 | 39 days |
| 1935 | 43 days |
| 1936 | 24 days |
| 1937 | 23 days |
| 1938 | 30 days |
| 1939 | 42 days |
| 1940 | 32 days |
| 1941 | 41 days |
| 1942 | 27 days |
| 1943 | 42 days |
| 1944 | 41 days |
| 1945 | 22 days |
| 1946 | 26 days |
| 1947 | 38 days |
| 1948 | 34 days |
| 1949 | 33 days |
| 1950 | 15 days |
| 1951 | 24 days |
| 1952 | 23 days |
| 1953 | 19 days |
| 1954 | 17 days |
| 1955 | 29 days |
| 1956 | 19 days |
| 1957 | 19 days |
| 1958 | 23 days |
| 1959 | 27 days |
| 1960 | 20 days |
| 1961 | 28 days |
| 1962 | 32 days |
| 1963 | 21 days |
| 1964 | 30 days |
| 1965 | 39 days |
| 1966 | 33 days |
| 1967 | 18 days |
| 1968 | 25 days |
| 1969 | 29 days |
| 1970 | 28 days |
| 1971 | 49 days |
| 1972 | 28 days |
| 1973 | 25 days |
| 1974 | 30 days |
| 1975 | 30 days |
| 1976 | 37 days |
| 1977 | 26 days |
| 1978 | 34 days |
| 1979 | 27 days |
| 1980 | 20 days |
| 1981 | 26 days |
| 1982 | 19 days |
| 1983 | 23 days |
| 1984 | 42 days |
| 1985 | 31 days |
| 1986 | 26 days |
| 1987 | 46 days |
| 1988 | 26 days |
| 1989 | 17 days |
| 1990 | 36 days |
| 1991 | 29 days |
| 1992 | 34 days |
| 1993 | 15 days |
| 1994 | 39 days |
| 1995 | 36 days |
| 1996 | 28 days |
| 1997 | 26 days |
| 1998 | 28 days |
| 1999 | 18 days |
| 2000 | 29 days |
| 2001 | 64 days |
| 2002 | 24 days |
| 2003 | 22 days |
| 2004 | 25 days |
| 2005 | 22 days |
| 2006 | 34 days |
| 2007 | 42 days |
| 2008 | 22 days |
| 2009 | 42 days |
| 2010 | 32 days |
| 2011 | 22 days |
| 2012 | 48 days |
| 2013 | 18 days |
| 2014 | 15 days |
| 2015 | 14 days |
| 2016 | 30 days |
| 2017 | 39 days |
| 2018 | 23 days |
| 2019 | 28 days |
| 2020 | 25 days |
| 2021 | 33 days |
| 2022 | 27 days |
| 2023 | 22 days |
| 2024 | 30 days |
| 2025 | 20 days |
| 2026 | 26 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
115 years with a frostAcross 115 years with a frost, the median last spring frost at Lewistown AP falls on 27 May and the median first autumn frost on 16 September, which leaves a median of 114 days between them.
In 1994 to 2025 the median growing season was 121 days. That is 21 days more than in 1896 to 1936.
Fitted over all years, the growing season changes by +3.1 days per decade at this station.
| Measure | Median, all years | Earliest period (1896 to 1936) | Recent period (1994 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 27 May | 1 June | 24 May | 8 days earlier | -1.0 days per decade |
| First autumn frost | 16 September | 4 September | 20 September | 16 days later | +2.0 days per decade |
| Growing days | 114 days | 100 days | 121 days | 21 days more | +3.1 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
124 years, 1896 to 2025A day with at least 33.2 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 97.2 mm (3.8 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 33.2 mm (1.3 in) | |
| 5 years | 46.1 mm (1.8 in) | |
| 10 years | 56.2 mm (2.2 in) | |
| 25 years | 70.8 mm (2.8 in) | |
| 50 years | 83.3 mm (3.3 in) | |
| 100 years | 97.2 mm (3.8 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 124 years of values from 1896 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: 110.5 mm (4.4 in) in 2024; 84.8 mm (3.3 in) in 2014; 78.7 mm (3.1 in) in 1906.
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, Lewistown AP had a mean temperature of 6.4 C (43.5 F) and 446.0 mm (17.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Palisades (United States, 434 km away), Kamas (United States, 728 km away) and Grace (United States, 531 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Palisades | United States | 434 km (270 mi) | 6.5 C (43.8 F) | 533.3 mm (21.0 in) | 1.20 |
| Kamas | United States | 728 km (452 mi) | 6.5 C (43.7 F) | 404.4 mm (15.9 in) | 1.22 |
| Grace | United States | 531 km (330 mi) | 6.1 C (43.0 F) | 390.6 mm (15.4 in) | 1.23 |
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).