Alton Weather Records (USC00420086)
Record envelope, standing records and threshold days for Alton (USC00420086), Utah, United States, with 112 years of record.
Key Facts for Alton
- Alton (USC00420086) is a weather station in Utah, United States at 37.44 latitude and -112.48 longitude, 2,164 m (7,098 ft) above sea level.
- The station reports from 1915 to 2026, 112 years of record.
- 1,464 records set at Alton still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Alton tied a daily record high minimum temperature of 16.1 C (61.0 F) on 21 August 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Utah, United States, 37.44 latitude, -112.48 longitude.
- Elevation: 2,164 m (7,098 ft).
- Period of record: 1915 to 2026, 112 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
13 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 17.8 C (64.0 F) | -28.9 C (-20.0 F) | 14.4 C (57.9 F) | -12.2 C (10.0 F) |
| Feb | 20.0 C (68.0 F) | -27.2 C (-17.0 F) | 16.7 C (62.1 F) | -17.8 C (0.0 F) |
| Mar | 27.2 C (81.0 F) | -21.7 C (-7.1 F) | 27.2 C (81.0 F) | -5.6 C (21.9 F) |
| Apr | 27.2 C (81.0 F) | -18.9 C (-2.0 F) | 21.7 C (71.1 F) | -6.7 C (19.9 F) |
| May | 32.2 C (90.0 F) | -15.0 C (5.0 F) | 27.8 C (82.0 F) | -3.3 C (26.1 F) |
| Jun | 35.6 C (96.1 F) | -5.0 C (23.0 F) | 30.6 C (87.1 F) | 4.4 C (39.9 F) |
| Jul | 38.3 C (100.9 F) | 0.0 C (32.0 F) | 34.4 C (93.9 F) | 5.0 C (41.0 F) |
| Aug | 36.1 C (97.0 F) | 0.0 C (32.0 F) | 33.9 C (93.0 F) | 7.8 C (46.0 F) |
| Sep | 33.9 C (93.0 F) | -6.7 C (19.9 F) | 26.1 C (79.0 F) | 4.4 C (39.9 F) |
| Oct | 29.4 C (84.9 F) | -18.9 C (-2.0 F) | 24.4 C (75.9 F) | 6.7 C (44.1 F) |
| Nov | 25.0 C (77.0 F) | -20.6 C (-5.1 F) | n/a | n/a |
| Dec | 19.4 C (66.9 F) | -31.1 C (-24.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1915 | 14 |
| 1916 | 22 |
| 1917 | 15 |
| 1918 | 29 |
| 1919 | 17 |
| 1920 | 20 |
| 1921 | 15 |
| 1922 | 21 |
| 1923 | 10 |
| 1924 | 36 |
| 1925 | 35 |
| 1926 | 28 |
| 1927 | 27 |
| 1928 | 15 |
| 1929 | 9 |
| 1930 | 20 |
| 1931 | 10 |
| 1932 | 13 |
| 1933 | 18 |
| 1934 | 17 |
| 1935 | 12 |
| 1936 | 13 |
| 1937 | 21 |
| 1938 | 9 |
| 1939 | 8 |
| 1940 | 8 |
| 1941 | 11 |
| 1942 | 17 |
| 1943 | 8 |
| 1944 | 5 |
| 1945 | 13 |
| 1946 | 4 |
| 1947 | 17 |
| 1948 | 7 |
| 1949 | 20 |
| 1950 | 24 |
| 1951 | 11 |
| 1952 | 8 |
| 1953 | 10 |
| 1954 | 8 |
| 1955 | 12 |
| 1956 | 12 |
| 1957 | 5 |
| 1958 | 15 |
| 1959 | 11 |
| 1960 | 15 |
| 1961 | 9 |
| 1962 | 25 |
| 1963 | 15 |
| 1964 | 14 |
| 1965 | 11 |
| 1966 | 9 |
| 1967 | 14 |
| 1968 | 5 |
| 1969 | 8 |
| 1970 | 9 |
| 1971 | 19 |
| 1972 | 14 |
| 1973 | 6 |
| 1974 | 6 |
| 1975 | 22 |
| 1976 | 13 |
| 1977 | 8 |
| 1978 | 9 |
| 1979 | 9 |
| 1980 | 14 |
| 1981 | 11 |
| 1982 | 12 |
| 1983 | 3 |
| 1984 | 12 |
| 1985 | 11 |
| 1986 | 23 |
| 1987 | 4 |
| 1988 | 4 |
| 1989 | 17 |
| 1990 | 18 |
| 1991 | 9 |
| 1992 | 3 |
| 1993 | 9 |
| 1994 | 4 |
| 1995 | 5 |
| 1996 | 20 |
| 1997 | 5 |
| 1998 | 4 |
| 1999 | 6 |
| 2000 | 15 |
| 2001 | 7 |
| 2002 | 11 |
| 2003 | 17 |
| 2004 | 8 |
| 2005 | 5 |
| 2006 | 7 |
| 2007 | 16 |
| 2008 | 12 |
| 2009 | 11 |
| 2010 | 14 |
| 2011 | 5 |
| 2012 | 6 |
| 2013 | 14 |
| 2014 | 10 |
| 2015 | 31 |
| 2016 | 14 |
| 2017 | 17 |
| 2018 | 4 |
| 2019 | 12 |
| 2020 | 21 |
| 2021 | 15 |
| 2022 | 10 |
| 2023 | 10 |
| 2024 | 17 |
| 2025 | 14 |
| 2026 | 27 |
All-Time Record Progression
10 new records| Date | Kind | Detail |
|---|---|---|
| 1949-01-03 | Record low maximum temperature | Record low maximum temperature -13.3 C (8.1 F) |
| 1959-07-11 | Record high maximum temperature | Record high maximum temperature 35.0 C (95.0 F) |
| 1963-01-12 | Record low maximum temperature | Record low maximum temperature -16.1 C (3.0 F) |
| 1972-07-13 | Record high maximum temperature | Record high maximum temperature 35.6 C (96.1 F) |
| 1979-01-30 | Record low minimum temperature | Record low minimum temperature -28.9 C (-20.0 F) |
| 1989-07-18 | Record high maximum temperature | Record high maximum temperature 36.7 C (98.1 F) |
| 1990-12-22 | Record low minimum temperature | Record low minimum temperature -31.1 C (-24.0 F) |
| 1996-07-05 | Record high maximum temperature | Record high maximum temperature 37.2 C (99.0 F) |
| 2015-03-02 | Record daily snowfall | Record daily snowfall 71.1 cm (28.0 in) |
| 2021-07-10 | Record high maximum temperature | Record high maximum temperature 38.3 C (100.9 F) |
Wettest Day of Each Month
Mar: 90.2 mm (3.6 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 57.9 mm (2.3 in) | 25 January 1969 |
| Feb | 49.8 mm (2.0 in) | 9 February 1976 |
| Mar | 90.2 mm (3.6 in) | 3 March 1938 |
| Apr | 29.5 mm (1.2 in) | 29 April 1917 |
| May | 47.0 mm (1.9 in) | 28 May 1934 |
| Jun | 43.7 mm (1.7 in) | 26 June 1952 |
| Jul | 45.2 mm (1.8 in) | 22 July 1966 |
| Aug | 52.1 mm (2.1 in) | 29 August 1951 |
| Sep | 61.0 mm (2.4 in) | 19 September 1972 |
| Oct | 73.7 mm (2.9 in) | 21 October 2004 |
| Nov | 88.9 mm (3.5 in) | 24 November 2010 |
| Dec | 81.5 mm (3.2 in) | 6 December 1966 |
Period of Record Coverage
1915 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1915 | 235 | 64% | No |
| 1916 | 365 | 100% | Yes |
| 1917 | 363 | 99% | Yes |
| 1918 | 358 | 98% | Yes |
| 1919 | 342 | 94% | Yes |
| 1920 | 362 | 99% | Yes |
| 1921 | 362 | 99% | Yes |
| 1922 | 344 | 94% | Yes |
| 1923 | 348 | 95% | Yes |
| 1924 | 363 | 99% | Yes |
| 1925 | 360 | 99% | Yes |
| 1926 | 355 | 97% | Yes |
| 1927 | 357 | 98% | Yes |
| 1928 | 353 | 96% | Yes |
| 1929 | 363 | 99% | Yes |
| 1930 | 361 | 99% | Yes |
| 1931 | 359 | 98% | Yes |
| 1932 | 363 | 99% | Yes |
| 1933 | 357 | 98% | Yes |
| 1934 | 364 | 100% | Yes |
| 1935 | 360 | 99% | Yes |
| 1936 | 358 | 98% | Yes |
| 1937 | 356 | 98% | Yes |
| 1938 | 364 | 100% | Yes |
| 1939 | 359 | 98% | Yes |
| 1940 | 363 | 99% | Yes |
| 1941 | 362 | 99% | Yes |
| 1942 | 364 | 100% | Yes |
| 1943 | 354 | 97% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 333 | 91% | Yes |
| 1956 | 363 | 99% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 362 | 99% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 365 | 100% | Yes |
| 1969 | 363 | 99% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 365 | 100% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 354 | 97% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 362 | 99% | Yes |
| 1982 | 354 | 97% | Yes |
| 1983 | 354 | 97% | Yes |
| 1984 | 317 | 87% | No |
| 1985 | 349 | 96% | Yes |
| 1986 | 329 | 90% | Yes |
| 1987 | 340 | 93% | Yes |
| 1988 | 334 | 91% | Yes |
| 1989 | 343 | 94% | Yes |
| 1990 | 338 | 93% | Yes |
| 1991 | 350 | 96% | Yes |
| 1992 | 353 | 96% | Yes |
| 1993 | 303 | 83% | No |
| 1994 | 317 | 87% | No |
| 1995 | 348 | 95% | Yes |
| 1996 | 351 | 96% | Yes |
| 1997 | 346 | 95% | Yes |
| 1998 | 352 | 96% | Yes |
| 1999 | 348 | 95% | Yes |
| 2000 | 338 | 92% | Yes |
| 2001 | 350 | 96% | Yes |
| 2002 | 351 | 96% | Yes |
| 2003 | 352 | 96% | Yes |
| 2004 | 347 | 95% | Yes |
| 2005 | 351 | 96% | Yes |
| 2006 | 356 | 98% | Yes |
| 2007 | 355 | 97% | Yes |
| 2008 | 319 | 87% | No |
| 2009 | 337 | 92% | Yes |
| 2010 | 336 | 92% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 362 | 99% | Yes |
| 2014 | 364 | 100% | Yes |
| 2015 | 355 | 97% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 362 | 99% | Yes |
| 2018 | 356 | 98% | Yes |
| 2019 | 363 | 99% | Yes |
| 2020 | 363 | 99% | Yes |
| 2021 | 361 | 99% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 364 | 100% | Yes |
| 2026 | 256 | 70% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 21 August 2026 | Alton, US | daily high min (Tie, Provisional) | 16.1 C (61.0 F) | tie | 68 years | 7 of 100 (Routine) |
| 14 August 2026 | Alton, US | daily rain | 18.0 mm (0.7 in) | 4.3 mm (0.17 in) | 40 years | 20 of 100 (Routine) |
| 10 August 2026 | Alton, US | daily high min (Tie) | 14.4 C (57.9 F) | tie | 56 years | 6 of 100 (Routine) |
| 8 August 2026 | Alton, US | daily high min (Tie) | 15.6 C (60.1 F) | tie | 29 years | 4 of 100 (Routine) |
| 23 July 2026 | Alton, US | daily rain | 28.4 mm (1.1 in) | 5.5 mm (0.22 in) | 84 years | 44 of 100 (Notable) |
| 18 May 2026 | Alton, US | daily snowfall | 0.5 cm (0.2 in) | 0.5 cm (0.2 in) | 97 years | 20 of 100 (Routine) |
| 1 April 2026 | Alton, US | daily rain (Tie) | 19.8 mm (0.8 in) | tie | 100 years | 10 of 100 (Routine) |
| 31 March 2026 | Alton, US | daily high min (Tie) | 3.3 C (37.9 F) | tie | 88 years | 9 of 100 (Routine) |
| 28 March 2026 | Alton, US | daily high min | 3.9 C (39.0 F) | 1.1 C (2.0 F) | 48 years | 26 of 100 (Routine) |
| 28 March 2026 | Alton, US | daily high max | 22.8 C (73.0 F) | 0.6 C (1.1 F) | 11 years | 14 of 100 (Routine) |
| 27 March 2026 | Alton, US | daily high min | 5.6 C (42.1 F) | 2.8 C (5.0 F) | 11 years | 19 of 100 (Routine) |
| 27 March 2026 | Alton, US | daily high max | 22.8 C (73.0 F) | 1.1 C (2.0 F) | 11 years | 15 of 100 (Routine) |
| 26 March 2026 | Alton, US | daily high min | 3.9 C (39.0 F) | 0.6 C (1.1 F) | 72 years | 32 of 100 (Routine) |
| 26 March 2026 | Alton, US | daily high max | 24.4 C (75.9 F) | 2.7 C (4.9 F) | 4 years | 16 of 100 (Routine) |
| 25 March 2026 | Alton, US | daily high min | 5.6 C (42.1 F) | 2.3 C (4.1 F) | 97 years | 44 of 100 (Notable) |
| 25 March 2026 | Alton, US | daily high max | 25.0 C (77.0 F) | 3.3 C (5.9 F) | 4 years | 17 of 100 (Routine) |
| 24 March 2026 | Alton, US | daily high min | 5.6 C (42.1 F) | 3.4 C (6.1 F) | 97 years | 47 of 100 (Notable) |
| 24 March 2026 | Alton, US | daily high max | 25.6 C (78.1 F) | 3.9 C (7.0 F) | 69 years | 37 of 100 (Notable) |
| 23 March 2026 | Alton, US | daily high max | 23.9 C (75.0 F) | 3.9 C (7.0 F) | 28 years | 25 of 100 (Routine) |
| 22 March 2026 | Alton, US | daily high min | 6.7 C (44.1 F) | 3.4 C (6.1 F) | 96 years | 47 of 100 (Notable) |
Climate Trend
100 complete years, 1916 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1916 | 6.3 C | -1.44 C |
| 1917 | 6.4 C | -1.37 C |
| 1918 | 6.9 C | -0.91 C |
| 1920 | 6.2 C | -1.52 C |
| 1921 | 7.6 C | -0.12 C |
| 1922 | 6.7 C | -1.04 C |
| 1924 | 7.5 C | -0.28 C |
| 1925 | 6.9 C | -0.83 C |
| 1927 | 7.2 C | -0.56 C |
| 1928 | 7.7 C | -0.11 C |
| 1929 | 6.9 C | -0.83 C |
| 1930 | 6.6 C | -1.18 C |
| 1931 | 7.3 C | -0.42 C |
| 1932 | 6.2 C | -1.53 C |
| 1933 | 6.7 C | -1.08 C |
| 1934 | 9.1 C | +1.33 C |
| 1935 | 7.3 C | -0.46 C |
| 1936 | 7.7 C | -0.08 C |
| 1937 | 6.7 C | -1.11 C |
| 1938 | 6.7 C | -1.09 C |
| 1939 | 7.4 C | -0.37 C |
| 1940 | 7.8 C | +0.05 C |
| 1941 | 6.7 C | -1.11 C |
| 1942 | 7.1 C | -0.67 C |
| 1943 | 7.4 C | -0.32 C |
| 1944 | 6.4 C | -1.37 C |
| 1945 | 6.5 C | -1.28 C |
| 1946 | 7.0 C | -0.72 C |
| 1947 | 7.6 C | -0.16 C |
| 1948 | 6.6 C | -1.14 C |
| 1949 | 6.2 C | -1.54 C |
| 1950 | 8.0 C | +0.28 C |
| 1951 | 7.2 C | -0.53 C |
| 1952 | 7.1 C | -0.65 C |
| 1953 | 8.0 C | +0.19 C |
| 1954 | 8.7 C | +0.98 C |
| 1956 | 8.2 C | +0.45 C |
| 1957 | 7.6 C | -0.20 C |
| 1958 | 8.6 C | +0.88 C |
| 1959 | 8.2 C | +0.44 C |
| 1960 | 8.0 C | +0.24 C |
| 1961 | 7.7 C | -0.11 C |
| 1962 | 7.8 C | 0.00 C |
| 1963 | 7.8 C | +0.03 C |
| 1964 | 6.6 C | -1.12 C |
| 1965 | 7.0 C | -0.76 C |
| 1966 | 7.8 C | +0.05 C |
| 1967 | 7.3 C | -0.45 C |
| 1968 | 7.2 C | -0.56 C |
| 1969 | 7.3 C | -0.46 C |
| 1970 | 7.5 C | -0.27 C |
| 1971 | 6.8 C | -0.94 C |
| 1972 | 7.8 C | +0.02 C |
| 1973 | 6.8 C | -0.98 C |
| 1974 | 7.8 C | +0.08 C |
| 1975 | 6.6 C | -1.20 C |
| 1976 | 7.9 C | +0.12 C |
| 1977 | 8.3 C | +0.54 C |
| 1978 | 7.7 C | -0.07 C |
| 1979 | 7.3 C | -0.42 C |
| 1980 | 8.0 C | +0.20 C |
| 1981 | 8.8 C | +1.06 C |
| 1982 | 6.8 C | -0.93 C |
| 1983 | 7.4 C | -0.39 C |
| 1985 | 7.5 C | -0.27 C |
| 1986 | 8.7 C | +0.91 C |
| 1987 | 7.7 C | -0.04 C |
| 1988 | 8.2 C | +0.43 C |
| 1989 | 7.9 C | +0.17 C |
| 1990 | 7.3 C | -0.46 C |
| 1991 | 7.6 C | -0.13 C |
| 1992 | 7.4 C | -0.34 C |
| 1995 | 8.3 C | +0.55 C |
| 1996 | 8.9 C | +1.15 C |
| 1997 | 8.0 C | +0.28 C |
| 1998 | 7.1 C | -0.63 C |
| 1999 | 8.6 C | +0.79 C |
| 2000 | 9.0 C | +1.23 C |
| 2001 | 8.6 C | +0.80 C |
| 2002 | 8.6 C | +0.88 C |
| 2003 | 9.2 C | +1.40 C |
| 2004 | 7.9 C | +0.12 C |
| 2005 | 8.3 C | +0.55 C |
| 2007 | 9.0 C | +1.28 C |
| 2009 | 8.2 C | +0.40 C |
| 2011 | 7.7 C | -0.03 C |
| 2012 | 9.1 C | +1.37 C |
| 2013 | 8.4 C | +0.60 C |
| 2014 | 9.3 C | +1.55 C |
| 2015 | 10.3 C | +2.57 C |
| 2016 | 9.4 C | +1.68 C |
| 2017 | 9.6 C | +1.83 C |
| 2018 | 9.3 C | +1.58 C |
| 2019 | 7.7 C | -0.11 C |
| 2020 | 9.5 C | +1.73 C |
| 2021 | 9.5 C | +1.74 C |
| 2022 | 8.5 C | +0.69 C |
| 2023 | 7.6 C | -0.21 C |
| 2024 | 9.6 C | +1.83 C |
| 2025 | 9.9 C | +2.15 C |
The annual mean temperature here has risen by 0.2 C (0.2 to 0.3) per decade over 1916 to 2025. In Fahrenheit: 0.4 F (0.3 to 0.5) per decade. The slope is a straight line fitted to 100 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.2 to 0.3) per decade | 0.4 F (0.3 to 0.5) per decade | 1916 to 2025 | 100 | Rise |
| Mean daily maximum | 0.3 C (0.2 to 0.4) per decade | 0.5 F (0.4 to 0.6) per decade | 1916 to 2025 | 100 | Rise |
| Mean daily minimum | 0.1 C (0.1 to 0.2) per decade | 0.2 F (0.1 to 0.3) per decade | 1916 to 2025 | 100 | 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
1915 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.3 C (100.9 F) | 2021 | 33.3 C (91.9 F) | 112 |
| Coldest night (TNn) | -31.1 C (-24.0 F) | 1990 | -20.6 C (-5.1 F) | 112 |
| Wettest day (Rx1day) | 90.2 mm (3.6 in) | 1938 | 34.8 mm (1.4 in) | 112 |
| Wettest five days (Rx5day) | 207.8 mm (8.2 in) | 2010 | 58.0 mm (2.3 in) | 112 |
| Longest dry spell (CDD) | 102 days | 1974 | 40 days | 112 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1915 | 28.3 C (82.9 F) |
| 1916 | 29.4 C (84.9 F) |
| 1917 | 31.7 C (89.1 F) |
| 1918 | 34.4 C (93.9 F) |
| 1919 | 32.2 C (90.0 F) |
| 1920 | 30.6 C (87.1 F) |
| 1921 | 30.6 C (87.1 F) |
| 1922 | 32.2 C (90.0 F) |
| 1923 | 30.6 C (87.1 F) |
| 1924 | 31.7 C (89.1 F) |
| 1925 | 31.1 C (88.0 F) |
| 1926 | 30.6 C (87.1 F) |
| 1927 | 31.7 C (89.1 F) |
| 1928 | 30.6 C (87.1 F) |
| 1929 | 31.7 C (89.1 F) |
| 1930 | 30.0 C (86.0 F) |
| 1931 | 32.2 C (90.0 F) |
| 1932 | 30.0 C (86.0 F) |
| 1933 | 31.7 C (89.1 F) |
| 1934 | 31.7 C (89.1 F) |
| 1935 | 29.4 C (84.9 F) |
| 1936 | 32.2 C (90.0 F) |
| 1937 | 31.1 C (88.0 F) |
| 1938 | 30.6 C (87.1 F) |
| 1939 | 32.2 C (90.0 F) |
| 1940 | 32.2 C (90.0 F) |
| 1941 | 32.8 C (91.0 F) |
| 1942 | 32.2 C (90.0 F) |
| 1943 | 31.1 C (88.0 F) |
| 1944 | 30.6 C (87.1 F) |
| 1945 | 29.4 C (84.9 F) |
| 1946 | 30.0 C (86.0 F) |
| 1947 | 31.1 C (88.0 F) |
| 1948 | 31.1 C (88.0 F) |
| 1949 | 31.1 C (88.0 F) |
| 1950 | 33.3 C (91.9 F) |
| 1951 | 33.3 C (91.9 F) |
| 1952 | 30.6 C (87.1 F) |
| 1953 | 33.9 C (93.0 F) |
| 1954 | 34.4 C (93.9 F) |
| 1955 | 32.8 C (91.0 F) |
| 1956 | 33.9 C (93.0 F) |
| 1957 | 32.2 C (90.0 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 35.0 C (95.0 F) |
| 1960 | 35.0 C (95.0 F) |
| 1961 | 35.0 C (95.0 F) |
| 1962 | 34.4 C (93.9 F) |
| 1963 | 34.4 C (93.9 F) |
| 1964 | 33.3 C (91.9 F) |
| 1965 | 31.1 C (88.0 F) |
| 1966 | 33.9 C (93.0 F) |
| 1967 | 32.2 C (90.0 F) |
| 1968 | 32.2 C (90.0 F) |
| 1969 | 32.2 C (90.0 F) |
| 1970 | 34.4 C (93.9 F) |
| 1971 | 33.9 C (93.0 F) |
| 1972 | 35.6 C (96.1 F) |
| 1973 | 33.3 C (91.9 F) |
| 1974 | 35.0 C (95.0 F) |
| 1975 | 31.7 C (89.1 F) |
| 1976 | 35.0 C (95.0 F) |
| 1977 | 33.3 C (91.9 F) |
| 1978 | 33.3 C (91.9 F) |
| 1979 | 32.8 C (91.0 F) |
| 1980 | 33.3 C (91.9 F) |
| 1981 | 33.9 C (93.0 F) |
| 1982 | 35.0 C (95.0 F) |
| 1983 | 31.1 C (88.0 F) |
| 1984 | 35.6 C (96.1 F) |
| 1985 | 35.0 C (95.0 F) |
| 1986 | 31.7 C (89.1 F) |
| 1987 | 30.0 C (86.0 F) |
| 1988 | 31.7 C (89.1 F) |
| 1989 | 36.7 C (98.1 F) |
| 1990 | 32.2 C (90.0 F) |
| 1991 | 33.9 C (93.0 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 31.1 C (88.0 F) |
| 1994 | 34.4 C (93.9 F) |
| 1995 | 33.3 C (91.9 F) |
| 1996 | 37.2 C (99.0 F) |
| 1997 | 33.9 C (93.0 F) |
| 1998 | 34.4 C (93.9 F) |
| 1999 | 32.2 C (90.0 F) |
| 2000 | 35.0 C (95.0 F) |
| 2001 | 33.3 C (91.9 F) |
| 2002 | 36.1 C (97.0 F) |
| 2003 | 35.6 C (96.1 F) |
| 2004 | 33.9 C (93.0 F) |
| 2005 | 35.0 C (95.0 F) |
| 2006 | 35.0 C (95.0 F) |
| 2007 | 36.1 C (97.0 F) |
| 2008 | 32.8 C (91.0 F) |
| 2009 | 35.0 C (95.0 F) |
| 2010 | 35.6 C (96.1 F) |
| 2011 | 36.1 C (97.0 F) |
| 2012 | 32.8 C (91.0 F) |
| 2013 | 35.6 C (96.1 F) |
| 2014 | 33.3 C (91.9 F) |
| 2015 | 35.0 C (95.0 F) |
| 2016 | 35.0 C (95.0 F) |
| 2017 | 35.0 C (95.0 F) |
| 2018 | 34.4 C (93.9 F) |
| 2019 | 33.3 C (91.9 F) |
| 2020 | 36.1 C (97.0 F) |
| 2021 | 38.3 C (100.9 F) |
| 2022 | 35.6 C (96.1 F) |
| 2023 | 36.1 C (97.0 F) |
| 2024 | 37.2 C (99.0 F) |
| 2025 | 35.0 C (95.0 F) |
| 2026 | 34.4 C (93.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1915 | -18.9 C (-2.0 F) |
| 1916 | -28.3 C (-18.9 F) |
| 1917 | -21.1 C (-6.0 F) |
| 1918 | -21.1 C (-6.0 F) |
| 1919 | -26.1 C (-15.0 F) |
| 1920 | -18.9 C (-2.0 F) |
| 1921 | -18.9 C (-2.0 F) |
| 1922 | -23.3 C (-9.9 F) |
| 1923 | -20.0 C (-4.0 F) |
| 1924 | -23.3 C (-9.9 F) |
| 1925 | -21.1 C (-6.0 F) |
| 1926 | -20.0 C (-4.0 F) |
| 1927 | -18.3 C (-0.9 F) |
| 1928 | -19.4 C (-2.9 F) |
| 1929 | -20.6 C (-5.1 F) |
| 1930 | -22.2 C (-8.0 F) |
| 1931 | -23.3 C (-9.9 F) |
| 1932 | -24.4 C (-11.9 F) |
| 1933 | -27.2 C (-17.0 F) |
| 1934 | -15.0 C (5.0 F) |
| 1935 | -25.6 C (-14.1 F) |
| 1936 | -21.7 C (-7.1 F) |
| 1937 | -26.7 C (-16.1 F) |
| 1938 | -18.3 C (-0.9 F) |
| 1939 | -22.2 C (-8.0 F) |
| 1940 | -22.2 C (-8.0 F) |
| 1941 | -18.9 C (-2.0 F) |
| 1942 | -22.8 C (-9.0 F) |
| 1943 | -20.0 C (-4.0 F) |
| 1944 | -19.4 C (-2.9 F) |
| 1945 | -20.6 C (-5.1 F) |
| 1946 | -19.4 C (-2.9 F) |
| 1947 | -18.3 C (-0.9 F) |
| 1948 | -20.6 C (-5.1 F) |
| 1949 | -26.1 C (-15.0 F) |
| 1950 | -25.0 C (-13.0 F) |
| 1951 | -22.8 C (-9.0 F) |
| 1952 | -20.0 C (-4.0 F) |
| 1953 | -17.8 C (0.0 F) |
| 1954 | -16.7 C (1.9 F) |
| 1955 | -20.0 C (-4.0 F) |
| 1956 | -19.4 C (-2.9 F) |
| 1957 | -22.2 C (-8.0 F) |
| 1958 | -16.1 C (3.0 F) |
| 1959 | -20.0 C (-4.0 F) |
| 1960 | -21.7 C (-7.1 F) |
| 1961 | -22.2 C (-8.0 F) |
| 1962 | -26.7 C (-16.1 F) |
| 1963 | -25.6 C (-14.1 F) |
| 1964 | -22.2 C (-8.0 F) |
| 1965 | -18.3 C (-0.9 F) |
| 1966 | -23.9 C (-11.0 F) |
| 1967 | -21.7 C (-7.1 F) |
| 1968 | -20.0 C (-4.0 F) |
| 1969 | -22.2 C (-8.0 F) |
| 1970 | -17.8 C (0.0 F) |
| 1971 | -26.1 C (-15.0 F) |
| 1972 | -26.1 C (-15.0 F) |
| 1973 | -22.8 C (-9.0 F) |
| 1974 | -22.2 C (-8.0 F) |
| 1975 | -19.4 C (-2.9 F) |
| 1976 | -19.4 C (-2.9 F) |
| 1977 | -20.6 C (-5.1 F) |
| 1978 | -21.1 C (-6.0 F) |
| 1979 | -28.9 C (-20.0 F) |
| 1980 | -17.2 C (1.0 F) |
| 1981 | -16.7 C (1.9 F) |
| 1982 | -23.3 C (-9.9 F) |
| 1983 | -17.8 C (0.0 F) |
| 1984 | -21.1 C (-6.0 F) |
| 1985 | -25.0 C (-13.0 F) |
| 1986 | -17.2 C (1.0 F) |
| 1987 | -17.8 C (0.0 F) |
| 1988 | -22.8 C (-9.0 F) |
| 1989 | -25.0 C (-13.0 F) |
| 1990 | -31.1 C (-24.0 F) |
| 1991 | -15.6 C (3.9 F) |
| 1992 | -21.1 C (-6.0 F) |
| 1993 | -23.9 C (-11.0 F) |
| 1994 | -18.9 C (-2.0 F) |
| 1995 | -17.2 C (1.0 F) |
| 1996 | -23.3 C (-9.9 F) |
| 1997 | -17.8 C (0.0 F) |
| 1998 | -21.7 C (-7.1 F) |
| 1999 | -14.4 C (6.1 F) |
| 2000 | -17.8 C (0.0 F) |
| 2001 | -17.8 C (0.0 F) |
| 2002 | -18.9 C (-2.0 F) |
| 2003 | -18.9 C (-2.0 F) |
| 2004 | -20.0 C (-4.0 F) |
| 2005 | -20.6 C (-5.1 F) |
| 2006 | -17.8 C (0.0 F) |
| 2007 | -21.7 C (-7.1 F) |
| 2008 | -22.8 C (-9.0 F) |
| 2009 | -22.2 C (-8.0 F) |
| 2010 | -22.8 C (-9.0 F) |
| 2011 | -25.6 C (-14.1 F) |
| 2012 | -20.0 C (-4.0 F) |
| 2013 | -23.3 C (-9.9 F) |
| 2014 | -19.4 C (-2.9 F) |
| 2015 | -15.0 C (5.0 F) |
| 2016 | -16.7 C (1.9 F) |
| 2017 | -18.9 C (-2.0 F) |
| 2018 | -17.2 C (1.0 F) |
| 2019 | -20.6 C (-5.1 F) |
| 2020 | -14.4 C (6.1 F) |
| 2021 | -17.2 C (1.0 F) |
| 2022 | -18.3 C (-0.9 F) |
| 2023 | -18.3 C (-0.9 F) |
| 2024 | -13.9 C (7.0 F) |
| 2025 | -16.7 C (1.9 F) |
| 2026 | -17.8 C (0.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1915 | 30.5 mm (1.2 in) |
| 1916 | 50.8 mm (2.0 in) |
| 1917 | 29.5 mm (1.2 in) |
| 1918 | 50.8 mm (2.0 in) |
| 1919 | 29.0 mm (1.1 in) |
| 1920 | 50.3 mm (2.0 in) |
| 1921 | 40.6 mm (1.6 in) |
| 1922 | 24.6 mm (1.0 in) |
| 1923 | 17.3 mm (0.7 in) |
| 1924 | 21.6 mm (0.9 in) |
| 1925 | 35.1 mm (1.4 in) |
| 1926 | 25.4 mm (1.0 in) |
| 1927 | 42.2 mm (1.7 in) |
| 1928 | 24.1 mm (0.9 in) |
| 1929 | 26.7 mm (1.1 in) |
| 1930 | 21.1 mm (0.8 in) |
| 1931 | 29.7 mm (1.2 in) |
| 1932 | 47.0 mm (1.9 in) |
| 1933 | 28.4 mm (1.1 in) |
| 1934 | 47.0 mm (1.9 in) |
| 1935 | 25.7 mm (1.0 in) |
| 1936 | 38.4 mm (1.5 in) |
| 1937 | 40.6 mm (1.6 in) |
| 1938 | 90.2 mm (3.6 in) |
| 1939 | 43.2 mm (1.7 in) |
| 1940 | 40.9 mm (1.6 in) |
| 1941 | 35.6 mm (1.4 in) |
| 1942 | 21.6 mm (0.9 in) |
| 1943 | 49.3 mm (1.9 in) |
| 1944 | 27.9 mm (1.1 in) |
| 1945 | 25.4 mm (1.0 in) |
| 1946 | 34.0 mm (1.3 in) |
| 1947 | 36.8 mm (1.4 in) |
| 1948 | 30.0 mm (1.2 in) |
| 1949 | 57.2 mm (2.3 in) |
| 1950 | 21.6 mm (0.9 in) |
| 1951 | 52.1 mm (2.1 in) |
| 1952 | 43.7 mm (1.7 in) |
| 1953 | 21.6 mm (0.9 in) |
| 1954 | 26.7 mm (1.1 in) |
| 1955 | 33.5 mm (1.3 in) |
| 1956 | 31.5 mm (1.2 in) |
| 1957 | 31.2 mm (1.2 in) |
| 1958 | 30.5 mm (1.2 in) |
| 1959 | 22.9 mm (0.9 in) |
| 1960 | 33.5 mm (1.3 in) |
| 1961 | 22.9 mm (0.9 in) |
| 1962 | 29.0 mm (1.1 in) |
| 1963 | 39.6 mm (1.6 in) |
| 1964 | 45.7 mm (1.8 in) |
| 1965 | 38.6 mm (1.5 in) |
| 1966 | 81.5 mm (3.2 in) |
| 1967 | 30.2 mm (1.2 in) |
| 1968 | 26.9 mm (1.1 in) |
| 1969 | 57.9 mm (2.3 in) |
| 1970 | 38.1 mm (1.5 in) |
| 1971 | 35.3 mm (1.4 in) |
| 1972 | 61.0 mm (2.4 in) |
| 1973 | 19.1 mm (0.8 in) |
| 1974 | 27.9 mm (1.1 in) |
| 1975 | 31.0 mm (1.2 in) |
| 1976 | 49.8 mm (2.0 in) |
| 1977 | 26.4 mm (1.0 in) |
| 1978 | 51.6 mm (2.0 in) |
| 1979 | 43.2 mm (1.7 in) |
| 1980 | 40.1 mm (1.6 in) |
| 1981 | 29.7 mm (1.2 in) |
| 1982 | 42.4 mm (1.7 in) |
| 1983 | 45.0 mm (1.8 in) |
| 1984 | 33.0 mm (1.3 in) |
| 1985 | 22.9 mm (0.9 in) |
| 1986 | 43.2 mm (1.7 in) |
| 1987 | 84.3 mm (3.3 in) |
| 1988 | 25.7 mm (1.0 in) |
| 1989 | 44.5 mm (1.8 in) |
| 1990 | 22.9 mm (0.9 in) |
| 1991 | 30.5 mm (1.2 in) |
| 1992 | 30.5 mm (1.2 in) |
| 1993 | 37.1 mm (1.5 in) |
| 1994 | 25.9 mm (1.0 in) |
| 1995 | 44.5 mm (1.8 in) |
| 1996 | 33.3 mm (1.3 in) |
| 1997 | 33.5 mm (1.3 in) |
| 1998 | 34.8 mm (1.4 in) |
| 1999 | 26.7 mm (1.1 in) |
| 2000 | 25.9 mm (1.0 in) |
| 2001 | 28.4 mm (1.1 in) |
| 2002 | 42.2 mm (1.7 in) |
| 2003 | 31.8 mm (1.3 in) |
| 2004 | 73.7 mm (2.9 in) |
| 2005 | 54.4 mm (2.1 in) |
| 2006 | 39.9 mm (1.6 in) |
| 2007 | 34.8 mm (1.4 in) |
| 2008 | 44.5 mm (1.8 in) |
| 2009 | 43.2 mm (1.7 in) |
| 2010 | 88.9 mm (3.5 in) |
| 2011 | 45.0 mm (1.8 in) |
| 2012 | 29.2 mm (1.1 in) |
| 2013 | 31.5 mm (1.2 in) |
| 2014 | 55.9 mm (2.2 in) |
| 2015 | 52.3 mm (2.1 in) |
| 2016 | 43.4 mm (1.7 in) |
| 2017 | 32.5 mm (1.3 in) |
| 2018 | 23.9 mm (0.9 in) |
| 2019 | 40.6 mm (1.6 in) |
| 2020 | 53.3 mm (2.1 in) |
| 2021 | 40.4 mm (1.6 in) |
| 2022 | 36.3 mm (1.4 in) |
| 2023 | 45.5 mm (1.8 in) |
| 2024 | 27.4 mm (1.1 in) |
| 2025 | 40.1 mm (1.6 in) |
| 2026 | 28.7 mm (1.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1915 | 47.7 mm (1.9 in) |
| 1916 | 106.2 mm (4.2 in) |
| 1917 | 40.9 mm (1.6 in) |
| 1918 | 106.2 mm (4.2 in) |
| 1919 | 12.9 mm (0.5 in) |
| 1920 | 80.0 mm (3.1 in) |
| 1921 | 110.7 mm (4.4 in) |
| 1922 | 21.8 mm (0.9 in) |
| 1923 | 32.8 mm (1.3 in) |
| 1924 | 27.1 mm (1.1 in) |
| 1925 | 55.6 mm (2.2 in) |
| 1926 | 84.1 mm (3.3 in) |
| 1927 | 74.0 mm (2.9 in) |
| 1928 | 34.8 mm (1.4 in) |
| 1929 | 73.5 mm (2.9 in) |
| 1930 | 43.5 mm (1.7 in) |
| 1931 | 37.9 mm (1.5 in) |
| 1932 | 106.4 mm (4.2 in) |
| 1933 | 60.1 mm (2.4 in) |
| 1934 | 48.3 mm (1.9 in) |
| 1935 | 36.4 mm (1.4 in) |
| 1936 | 46.5 mm (1.8 in) |
| 1937 | 44.7 mm (1.8 in) |
| 1938 | 129.6 mm (5.1 in) |
| 1939 | 91.7 mm (3.6 in) |
| 1940 | 60.7 mm (2.4 in) |
| 1941 | 47.4 mm (1.9 in) |
| 1942 | 33.3 mm (1.3 in) |
| 1943 | 86.9 mm (3.4 in) |
| 1944 | 43.1 mm (1.7 in) |
| 1945 | 44.5 mm (1.8 in) |
| 1946 | 58.9 mm (2.3 in) |
| 1947 | 68.6 mm (2.7 in) |
| 1948 | 38.7 mm (1.5 in) |
| 1949 | 80.5 mm (3.2 in) |
| 1950 | 33.7 mm (1.3 in) |
| 1951 | 52.1 mm (2.1 in) |
| 1952 | 43.7 mm (1.7 in) |
| 1953 | 29.2 mm (1.1 in) |
| 1954 | 72.6 mm (2.9 in) |
| 1955 | 63.8 mm (2.5 in) |
| 1956 | 62.0 mm (2.4 in) |
| 1957 | 49.8 mm (2.0 in) |
| 1958 | 37.6 mm (1.5 in) |
| 1959 | 46.1 mm (1.8 in) |
| 1960 | 62.7 mm (2.5 in) |
| 1961 | 32.3 mm (1.3 in) |
| 1962 | 55.6 mm (2.2 in) |
| 1963 | 53.1 mm (2.1 in) |
| 1964 | 68.8 mm (2.7 in) |
| 1965 | 78.9 mm (3.1 in) |
| 1966 | 141.7 mm (5.6 in) |
| 1967 | 73.4 mm (2.9 in) |
| 1968 | 68.3 mm (2.7 in) |
| 1969 | 131.6 mm (5.2 in) |
| 1970 | 72.4 mm (2.9 in) |
| 1971 | 98.8 mm (3.9 in) |
| 1972 | 67.4 mm (2.7 in) |
| 1973 | 36.1 mm (1.4 in) |
| 1974 | 52.3 mm (2.1 in) |
| 1975 | 38.6 mm (1.5 in) |
| 1976 | 90.5 mm (3.6 in) |
| 1977 | 36.6 mm (1.4 in) |
| 1978 | 87.1 mm (3.4 in) |
| 1979 | 58.0 mm (2.3 in) |
| 1980 | 72.4 mm (2.9 in) |
| 1981 | 48.3 mm (1.9 in) |
| 1982 | 62.0 mm (2.4 in) |
| 1983 | 58.7 mm (2.3 in) |
| 1984 | 43.4 mm (1.7 in) |
| 1985 | 59.5 mm (2.3 in) |
| 1986 | 97.1 mm (3.8 in) |
| 1987 | 120.4 mm (4.7 in) |
| 1988 | 51.1 mm (2.0 in) |
| 1989 | 44.5 mm (1.8 in) |
| 1990 | 39.3 mm (1.5 in) |
| 1991 | 49.7 mm (2.0 in) |
| 1992 | 51.6 mm (2.0 in) |
| 1993 | 86.1 mm (3.4 in) |
| 1994 | 38.9 mm (1.5 in) |
| 1995 | 45.7 mm (1.8 in) |
| 1996 | 64.0 mm (2.5 in) |
| 1997 | 56.9 mm (2.2 in) |
| 1998 | 69.1 mm (2.7 in) |
| 1999 | 39.5 mm (1.6 in) |
| 2000 | 46.4 mm (1.8 in) |
| 2001 | 33.9 mm (1.3 in) |
| 2002 | 75.8 mm (3.0 in) |
| 2003 | 52.8 mm (2.1 in) |
| 2004 | 145.1 mm (5.7 in) |
| 2005 | 150.7 mm (5.9 in) |
| 2006 | 53.4 mm (2.1 in) |
| 2007 | 50.8 mm (2.0 in) |
| 2008 | 65.6 mm (2.6 in) |
| 2009 | 47.0 mm (1.9 in) |
| 2010 | 207.8 mm (8.2 in) |
| 2011 | 58.0 mm (2.3 in) |
| 2012 | 42.2 mm (1.7 in) |
| 2013 | 52.5 mm (2.1 in) |
| 2014 | 59.2 mm (2.3 in) |
| 2015 | 77.2 mm (3.0 in) |
| 2016 | 69.6 mm (2.7 in) |
| 2017 | 74.9 mm (2.9 in) |
| 2018 | 41.0 mm (1.6 in) |
| 2019 | 69.8 mm (2.7 in) |
| 2020 | 62.2 mm (2.4 in) |
| 2021 | 70.6 mm (2.8 in) |
| 2022 | 58.4 mm (2.3 in) |
| 2023 | 67.9 mm (2.7 in) |
| 2024 | 56.8 mm (2.2 in) |
| 2025 | 63.9 mm (2.5 in) |
| 2026 | 53.9 mm (2.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1915 | 16 days |
| 1916 | 69 days |
| 1917 | 35 days |
| 1918 | 10 days |
| 1919 | 2 days |
| 1920 | 14 days |
| 1921 | 2 days |
| 1922 | 6 days |
| 1923 | 11 days |
| 1924 | 1 day |
| 1925 | 6 days |
| 1926 | 3 days |
| 1927 | 24 days |
| 1928 | 36 days |
| 1929 | 76 days |
| 1930 | 33 days |
| 1931 | 33 days |
| 1932 | 40 days |
| 1933 | 48 days |
| 1934 | 40 days |
| 1935 | 57 days |
| 1936 | 55 days |
| 1937 | 62 days |
| 1938 | 36 days |
| 1939 | 32 days |
| 1940 | 26 days |
| 1941 | 30 days |
| 1942 | 72 days |
| 1943 | 37 days |
| 1944 | 80 days |
| 1945 | 31 days |
| 1946 | 43 days |
| 1947 | 36 days |
| 1948 | 34 days |
| 1949 | 42 days |
| 1950 | 63 days |
| 1951 | 53 days |
| 1952 | 54 days |
| 1953 | 43 days |
| 1954 | 50 days |
| 1955 | 54 days |
| 1956 | 67 days |
| 1957 | 34 days |
| 1958 | 62 days |
| 1959 | 36 days |
| 1960 | 58 days |
| 1961 | 34 days |
| 1962 | 54 days |
| 1963 | 41 days |
| 1964 | 52 days |
| 1965 | 27 days |
| 1966 | 71 days |
| 1967 | 47 days |
| 1968 | 42 days |
| 1969 | 31 days |
| 1970 | 39 days |
| 1971 | 37 days |
| 1972 | 86 days |
| 1973 | 39 days |
| 1974 | 102 days |
| 1975 | 24 days |
| 1976 | 54 days |
| 1977 | 56 days |
| 1978 | 76 days |
| 1979 | 54 days |
| 1980 | 47 days |
| 1981 | 40 days |
| 1982 | 40 days |
| 1983 | 36 days |
| 1984 | 26 days |
| 1985 | 38 days |
| 1986 | 28 days |
| 1987 | 31 days |
| 1988 | 34 days |
| 1989 | 63 days |
| 1990 | 31 days |
| 1991 | 41 days |
| 1992 | 34 days |
| 1993 | 58 days |
| 1994 | 27 days |
| 1995 | 35 days |
| 1996 | 40 days |
| 1997 | 38 days |
| 1998 | 27 days |
| 1999 | 46 days |
| 2000 | 34 days |
| 2001 | 34 days |
| 2002 | 78 days |
| 2003 | 37 days |
| 2004 | 40 days |
| 2005 | 26 days |
| 2006 | 30 days |
| 2007 | 40 days |
| 2008 | 36 days |
| 2009 | 35 days |
| 2010 | 90 days |
| 2011 | 46 days |
| 2012 | 84 days |
| 2013 | 45 days |
| 2014 | 43 days |
| 2015 | 53 days |
| 2016 | 44 days |
| 2017 | 40 days |
| 2018 | 51 days |
| 2019 | 69 days |
| 2020 | 95 days |
| 2021 | 42 days |
| 2022 | 63 days |
| 2023 | 46 days |
| 2024 | 55 days |
| 2025 | 79 days |
| 2026 | 33 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
100 years with a frostAcross 100 years with a frost, the median last spring frost at Alton falls on 5 June and the median first autumn frost on 25 September, which leaves a median of 115 days between them.
In 1991 to 2025 the median growing season was 119 days. That is 3 days more than in 1916 to 1948.
Fitted over all years, the growing season changes by +1.3 days per decade at this station.
| Measure | Median, all years | Earliest period (1916 to 1948) | Recent period (1991 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 5 June | 7 June | 1 June | 6 days earlier | -0.5 days per decade |
| First autumn frost | 25 September | 26 September | 30 September | 4 days later | +0.8 days per decade |
| Growing days | 115 days | 116 days | 119 days | 3 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
98 years, 1928 to 2025A day with at least 35.1 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 90.5 mm (3.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 35.1 mm (1.4 in) | |
| 5 years | 47.1 mm (1.9 in) | |
| 10 years | 56.0 mm (2.2 in) | |
| 25 years | 68.7 mm (2.7 in) | |
| 50 years | 79.1 mm (3.1 in) | |
| 100 years | 90.5 mm (3.6 in) | Longer than the 98 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 98 years of values from 1928 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: 90.2 mm (3.6 in) in 1938; 88.9 mm (3.5 in) in 2010; 84.3 mm (3.3 in) in 1987.
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, Alton had a mean temperature of 9.0 C (48.2 F) and 447.4 mm (17.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Chevelon Rs (United States, 352 km away), Heber (Black Mesa) Rs (United States, 381 km away) and Fence Lake (United States, 462 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Chevelon Rs | United States | 352 km (219 mi) | 9.3 C (48.7 F) | 482.9 mm (19.0 in) | 0.58 |
| Heber (Black Mesa) Rs | United States | 381 km (237 mi) | 9.1 C (48.3 F) | 475.0 mm (18.7 in) | 0.66 |
| Fence Lake | United States | 462 km (287 mi) | 8.9 C (48.1 F) | 366.3 mm (14.4 in) | 0.66 |
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.
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Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).