Riverton Weather Records (USC00487760)
Record envelope, standing records and threshold days for Riverton (USC00487760), Wyoming, United States, with 120 years of record.
Key Facts for Riverton
- Riverton (USC00487760) is a weather station in Wyoming, United States at 43.03 latitude and -108.37 longitude, 1,510 m (4,955 ft) above sea level.
- The station reports from 1907 to 2026, 120 years of record.
- 1,464 records set at Riverton still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Riverton set a daily record high minimum temperature of 7.8 C (46.0 F) on 10 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Wyoming, United States, 43.03 latitude, -108.37 longitude.
- Elevation: 1,510 m (4,955 ft).
- Period of record: 1907 to 2026, 120 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
20 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 17.2 C (63.0 F) | -43.3 C (-45.9 F) | 16.1 C (61.0 F) | -25.0 C (-13.0 F) |
| Feb | 21.7 C (71.1 F) | -42.8 C (-45.0 F) | 16.7 C (62.1 F) | -21.7 C (-7.1 F) |
| Mar | 28.9 C (84.0 F) | -31.1 C (-24.0 F) | 28.9 C (84.0 F) | -12.2 C (10.0 F) |
| Apr | 30.6 C (87.1 F) | -27.8 C (-18.0 F) | 27.8 C (82.0 F) | -7.8 C (18.0 F) |
| May | 35.6 C (96.1 F) | -9.4 C (15.1 F) | 33.3 C (91.9 F) | -3.3 C (26.1 F) |
| Jun | 38.9 C (102.0 F) | -3.3 C (26.1 F) | 35.0 C (95.0 F) | 4.4 C (39.9 F) |
| Jul | 41.1 C (106.0 F) | -1.1 C (30.0 F) | 41.1 C (106.0 F) | 7.8 C (46.0 F) |
| Aug | 39.4 C (102.9 F) | -1.7 C (28.9 F) | 38.3 C (100.9 F) | 6.7 C (44.1 F) |
| Sep | 36.7 C (98.1 F) | -12.8 C (9.0 F) | 32.2 C (90.0 F) | 3.3 C (37.9 F) |
| Oct | 32.2 C (90.0 F) | -25.0 C (-13.0 F) | 29.4 C (84.9 F) | 3.3 C (37.9 F) |
| Nov | 22.8 C (73.0 F) | -33.3 C (-27.9 F) | n/a | n/a |
| Dec | 18.3 C (64.9 F) | -43.3 C (-45.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1907 | 16 |
| 1908 | 10 |
| 1909 | 28 |
| 1910 | 8 |
| 1911 | 5 |
| 1912 | 14 |
| 1918 | 2 |
| 1919 | 13 |
| 1920 | 12 |
| 1921 | 4 |
| 1922 | 6 |
| 1923 | 5 |
| 1924 | 18 |
| 1925 | 9 |
| 1926 | 12 |
| 1927 | 11 |
| 1928 | 5 |
| 1929 | 13 |
| 1930 | 15 |
| 1931 | 12 |
| 1932 | 13 |
| 1933 | 20 |
| 1934 | 11 |
| 1935 | 10 |
| 1936 | 26 |
| 1937 | 7 |
| 1938 | 1 |
| 1939 | 14 |
| 1940 | 9 |
| 1941 | 4 |
| 1942 | 7 |
| 1943 | 21 |
| 1944 | 8 |
| 1945 | 12 |
| 1946 | 14 |
| 1947 | 16 |
| 1948 | 15 |
| 1949 | 33 |
| 1950 | 23 |
| 1951 | 19 |
| 1952 | 7 |
| 1953 | 14 |
| 1954 | 23 |
| 1955 | 7 |
| 1956 | 5 |
| 1957 | 4 |
| 1958 | 10 |
| 1959 | 12 |
| 1960 | 15 |
| 1961 | 3 |
| 1962 | 22 |
| 1963 | 15 |
| 1964 | 9 |
| 1965 | 21 |
| 1966 | 22 |
| 1967 | 10 |
| 1968 | 5 |
| 1969 | 11 |
| 1970 | 10 |
| 1971 | 15 |
| 1972 | 24 |
| 1973 | 13 |
| 1974 | 8 |
| 1975 | 13 |
| 1976 | 8 |
| 1977 | 8 |
| 1978 | 20 |
| 1979 | 15 |
| 1980 | 13 |
| 1981 | 9 |
| 1982 | 14 |
| 1983 | 17 |
| 1984 | 23 |
| 1985 | 22 |
| 1986 | 20 |
| 1987 | 10 |
| 1988 | 13 |
| 1989 | 14 |
| 1990 | 20 |
| 1991 | 14 |
| 1992 | 15 |
| 1993 | 9 |
| 1994 | 8 |
| 1995 | 12 |
| 1996 | 11 |
| 1997 | 8 |
| 1998 | 1 |
| 1999 | 4 |
| 2000 | 11 |
| 2001 | 3 |
| 2002 | 6 |
| 2003 | 18 |
| 2004 | 3 |
| 2005 | 4 |
| 2006 | 14 |
| 2007 | 10 |
| 2008 | 7 |
| 2009 | 16 |
| 2010 | 11 |
| 2011 | 13 |
| 2012 | 22 |
| 2013 | 19 |
| 2014 | 18 |
| 2015 | 12 |
| 2016 | 3 |
| 2017 | 8 |
| 2018 | 8 |
| 2019 | 12 |
| 2020 | 15 |
| 2021 | 25 |
| 2022 | 17 |
| 2023 | 19 |
| 2024 | 10 |
| 2025 | 20 |
| 2026 | 33 |
All-Time Record Progression
11 new records| Date | Kind | Detail |
|---|---|---|
| 1954-07-12 | Record high maximum temperature | Record high maximum temperature 40.0 C (104.0 F) |
| 1979-01-01 | Record low maximum temperature | Record low maximum temperature -27.8 C (-18.0 F) |
| 1979-04-01 | Record daily snowfall | Record daily snowfall 43.2 cm (17.0 in) |
| 1981-07-12 | Record high minimum temperature | Record high minimum temperature 21.1 C (70.0 F) |
| 1990-12-22 | Record low maximum temperature | Record low maximum temperature -30.6 C (-23.1 F) |
| 2011-07-26 | Record high minimum temperature | Record high minimum temperature 21.7 C (71.1 F) |
| 2023-01-11 | Record snow depth | Record snow depth 48.3 cm (19.0 in) |
| 2023-02-22 | Record snow depth | Record snow depth 55.9 cm (22.0 in) |
| 2023-02-23 | Record snow depth | Record snow depth 58.4 cm (23.0 in) |
| 2023-11-24 | Record daily snowfall | Record daily snowfall 55.4 cm (21.8 in) |
| 2026-07-13 | Record high maximum temperature | Record high maximum temperature 41.1 C (106.0 F) |
Wettest Day of Each Month
May: 89.7 mm (3.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 21.6 mm (0.9 in) | 16 January 1995 |
| Feb | 15.0 mm (0.6 in) | 24 February 1935 |
| Mar | 38.1 mm (1.5 in) | 31 March 2017 |
| Apr | 38.9 mm (1.5 in) | 26 April 1971 |
| May | 89.7 mm (3.5 in) | 8 May 1921 |
| Jun | 55.9 mm (2.2 in) | 3 June 1993 |
| Jul | 48.3 mm (1.9 in) | 24 July 1923 |
| Aug | 77.5 mm (3.1 in) | 1 August 1912 |
| Sep | 54.4 mm (2.1 in) | 27 September 1923 |
| Oct | 50.8 mm (2.0 in) | 6 October 1912 |
| Nov | 33.3 mm (1.3 in) | 24 November 2023 |
| Dec | 17.5 mm (0.7 in) | 2 December 1982 |
Period of Record Coverage
1907 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1907 | 335 | 92% | Yes |
| 1908 | 338 | 92% | Yes |
| 1909 | 193 | 53% | No |
| 1910 | 135 | 37% | No |
| 1911 | 176 | 48% | No |
| 1912 | 356 | 97% | Yes |
| 1918 | 150 | 41% | No |
| 1919 | 333 | 91% | Yes |
| 1920 | 310 | 85% | No |
| 1921 | 99 | 27% | No |
| 1922 | 257 | 70% | No |
| 1923 | 365 | 100% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 363 | 99% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 366 | 100% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 364 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 362 | 99% | Yes |
| 1948 | 363 | 99% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 364 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 362 | 99% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 321 | 88% | No |
| 1961 | 364 | 100% | Yes |
| 1962 | 363 | 99% | Yes |
| 1963 | 363 | 99% | Yes |
| 1964 | 362 | 99% | Yes |
| 1965 | 361 | 99% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 363 | 99% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 363 | 99% | Yes |
| 1973 | 332 | 91% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 328 | 90% | No |
| 1978 | 364 | 100% | Yes |
| 1979 | 293 | 80% | No |
| 1980 | 366 | 100% | Yes |
| 1981 | 357 | 98% | Yes |
| 1982 | 360 | 99% | Yes |
| 1983 | 364 | 100% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 314 | 86% | No |
| 1986 | 302 | 83% | No |
| 1987 | 321 | 88% | No |
| 1988 | 301 | 82% | No |
| 1989 | 253 | 69% | No |
| 1990 | 341 | 93% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 361 | 99% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 363 | 99% | Yes |
| 1995 | 358 | 98% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 361 | 99% | Yes |
| 1998 | 333 | 91% | Yes |
| 1999 | 291 | 80% | No |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 358 | 98% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 364 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 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 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 285 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 10 October 2026 | Riverton, US | daily high min (Provisional) | 7.8 C (46.0 F) | 1.1 C (2.0 F) | 12 years | 15 of 100 (Routine) |
| 6 October 2026 | Riverton, US | daily high max (Provisional) | 29.4 C (84.9 F) | 1.1 C (2.0 F) | 32 years | 20 of 100 (Routine) |
| 28 September 2026 | Riverton, US | daily high min (Provisional) | 11.1 C (52.0 F) | 0.5 C (0.9 F) | 11 years | 14 of 100 (Routine) |
| 29 August 2026 | Riverton, US | daily rain (Provisional) | 2.8 mm (0.11 in) | 0.5 mm (0.02 in) | 15 years | 14 of 100 (Routine) |
| 29 August 2026 | Riverton, US | daily high min (Tie, Provisional) | 16.1 C (61.0 F) | tie | 55 years | 6 of 100 (Routine) |
| 23 August 2026 | Riverton, US | daily high min (Provisional) | 16.7 C (62.1 F) | 0.6 C (1.1 F) | 31 years | 20 of 100 (Routine) |
| 22 August 2026 | Riverton, US | monthly high min (Provisional) | 20.6 C (69.1 F) | 0.6 C (1.1 F) | 104 years | 51 of 100 (Notable) |
| 12 August 2026 | Riverton, US | daily high min | 18.3 C (64.9 F) | 0.5 C (0.9 F) | 84 years | 36 of 100 (Notable) |
| 3 August 2026 | Riverton, US | daily high max | 38.3 C (100.9 F) | 1.6 C (2.9 F) | 24 years | 21 of 100 (Routine) |
| 2 August 2026 | Riverton, US | daily high max | 37.8 C (100.0 F) | 0.6 C (1.1 F) | 17 years | 16 of 100 (Routine) |
| 27 July 2026 | Riverton, US | daily high min (Tie) | 18.9 C (66.0 F) | tie | 16 years | 3 of 100 (Routine) |
| 26 July 2026 | Riverton, US | daily high max | 37.8 C (100.0 F) | 0.6 C (1.1 F) | 67 years | 31 of 100 (Routine) |
| 25 July 2026 | Riverton, US | daily high min | 18.9 C (66.0 F) | 0.6 C (1.1 F) | 69 years | 31 of 100 (Routine) |
| 21 July 2026 | Riverton, US | daily high min | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 13 years | 17 of 100 (Routine) |
| 17 July 2026 | Riverton, US | daily high min (Tie) | 18.3 C (64.9 F) | tie | 24 years | 4 of 100 (Routine) |
| 16 July 2026 | Riverton, US | daily high min | 19.4 C (66.9 F) | 2.2 C (4.0 F) | 25 years | 24 of 100 (Routine) |
| 13 July 2026 | Riverton, US | all-time high max | 41.1 C (106.0 F) | 1.1 C (2.0 F) | 72 years | 54 of 100 (Notable) |
| 25 June 2026 | Riverton, US | daily rain | 35.6 mm (1.4 in) | 13.8 mm (0.5 in) | 68 years | 47 of 100 (Notable) |
| 7 June 2026 | Riverton, US | daily high max | 35.0 C (95.0 F) | 1.1 C (2.0 F) | 37 years | 23 of 100 (Routine) |
| 27 May 2026 | Riverton, US | monthly high min (Tie) | 15.6 C (60.1 F) | tie | 11 years | 5 of 100 (Routine) |
Climate Trend
88 complete years, 1912 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1912 | 4.6 C | -1.74 C |
| 1923 | 5.2 C | -1.15 C |
| 1924 | 4.2 C | -2.11 C |
| 1925 | 7.2 C | +0.85 C |
| 1926 | 6.5 C | +0.24 C |
| 1927 | 6.2 C | -0.08 C |
| 1928 | 5.4 C | -0.92 C |
| 1929 | 4.7 C | -1.58 C |
| 1930 | 5.9 C | -0.41 C |
| 1931 | 6.2 C | -0.15 C |
| 1932 | 5.0 C | -1.29 C |
| 1933 | 7.2 C | +0.87 C |
| 1934 | 8.3 C | +1.96 C |
| 1935 | 6.2 C | -0.12 C |
| 1936 | 6.2 C | -0.09 C |
| 1937 | 5.7 C | -0.60 C |
| 1938 | 7.2 C | +0.89 C |
| 1939 | 7.3 C | +1.00 C |
| 1940 | 6.9 C | +0.61 C |
| 1941 | 6.4 C | +0.12 C |
| 1942 | 5.2 C | -1.07 C |
| 1943 | 7.0 C | +0.74 C |
| 1944 | 4.3 C | -2.05 C |
| 1945 | 5.6 C | -0.73 C |
| 1946 | 7.5 C | +1.21 C |
| 1947 | 6.3 C | +0.01 C |
| 1948 | 6.5 C | +0.19 C |
| 1949 | 5.7 C | -0.61 C |
| 1950 | 6.3 C | -0.02 C |
| 1951 | 5.6 C | -0.67 C |
| 1952 | 6.5 C | +0.16 C |
| 1953 | 7.7 C | +1.35 C |
| 1954 | 7.9 C | +1.58 C |
| 1955 | 5.8 C | -0.49 C |
| 1956 | 6.1 C | -0.17 C |
| 1957 | 6.3 C | +0.02 C |
| 1958 | 7.0 C | +0.69 C |
| 1959 | 5.8 C | -0.48 C |
| 1961 | 6.0 C | -0.26 C |
| 1962 | 6.2 C | -0.06 C |
| 1963 | 6.8 C | +0.50 C |
| 1964 | 5.8 C | -0.51 C |
| 1965 | 6.1 C | -0.18 C |
| 1966 | 6.7 C | +0.41 C |
| 1967 | 6.2 C | -0.12 C |
| 1968 | 4.7 C | -1.60 C |
| 1969 | 6.6 C | +0.32 C |
| 1970 | 6.1 C | -0.23 C |
| 1971 | 5.8 C | -0.55 C |
| 1972 | 5.4 C | -0.90 C |
| 1974 | 5.9 C | -0.38 C |
| 1975 | 4.9 C | -1.39 C |
| 1976 | 6.0 C | -0.34 C |
| 1978 | 4.5 C | -1.83 C |
| 1980 | 6.3 C | -0.05 C |
| 1981 | 7.9 C | +1.63 C |
| 1982 | 5.6 C | -0.69 C |
| 1983 | 5.2 C | -1.08 C |
| 1984 | 4.3 C | -1.96 C |
| 1985 | 4.6 C | -1.75 C |
| 1987 | 6.3 C | +0.02 C |
| 1988 | 7.4 C | +1.10 C |
| 1990 | 7.1 C | +0.75 C |
| 1991 | 6.3 C | +0.04 C |
| 1992 | 6.3 C | +0.04 C |
| 1993 | 3.8 C | -2.51 C |
| 1994 | 7.4 C | +1.05 C |
| 1995 | 6.9 C | +0.56 C |
| 1996 | 6.7 C | +0.43 C |
| 1997 | 6.8 C | +0.52 C |
| 2008 | 6.4 C | +0.13 C |
| 2009 | 6.6 C | +0.33 C |
| 2010 | 6.9 C | +0.63 C |
| 2011 | 6.6 C | +0.25 C |
| 2012 | 9.2 C | +2.87 C |
| 2013 | 6.9 C | +0.63 C |
| 2014 | 7.2 C | +0.86 C |
| 2015 | 7.7 C | +1.44 C |
| 2016 | 7.6 C | +1.29 C |
| 2017 | 6.7 C | +0.37 C |
| 2018 | 6.6 C | +0.34 C |
| 2019 | 5.3 C | -1.04 C |
| 2020 | 6.7 C | +0.42 C |
| 2021 | 8.4 C | +2.09 C |
| 2022 | 6.7 C | +0.35 C |
| 2023 | 5.1 C | -1.19 C |
| 2024 | 8.0 C | +1.68 C |
| 2025 | 8.3 C | +2.04 C |
The annual mean temperature here has risen by 0.10 C (0.03 to 0.17) per decade over 1912 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 88 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.10 C (0.03 to 0.17) per decade | 0.2 F (0.1 to 0.3) per decade | 1912 to 2025 | 88 | Rise |
| Mean daily maximum | 0.02 C (-0.06 to 0.10) per decade | 0.03 F (-0.11 to 0.17) per decade | 1912 to 2025 | 88 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.2 to 0.5) per decade | 1912 to 2025 | 88 | 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
1907 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 2026 | 36.7 C (98.1 F) | 115 |
| Coldest night (TNn) | -43.3 C (-45.9 F) | 1930 | -32.8 C (-27.0 F) | 115 |
| Wettest day (Rx1day) | 89.7 mm (3.5 in) | 1921 | 26.7 mm (1.1 in) | 115 |
| Wettest five days (Rx5day) | 115.1 mm (4.5 in) | 1923 | 39.7 mm (1.6 in) | 115 |
| Longest dry spell (CDD) | 88 days | 1962 | 43 days | 115 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1907 | 35.0 C (95.0 F) |
| 1908 | 36.7 C (98.1 F) |
| 1909 | 36.7 C (98.1 F) |
| 1910 | 36.1 C (97.0 F) |
| 1911 | 34.4 C (93.9 F) |
| 1912 | 35.0 C (95.0 F) |
| 1918 | 33.9 C (93.0 F) |
| 1919 | 38.3 C (100.9 F) |
| 1920 | 36.7 C (98.1 F) |
| 1921 | 24.4 C (75.9 F) |
| 1922 | 36.1 C (97.0 F) |
| 1923 | 35.0 C (95.0 F) |
| 1924 | 34.4 C (93.9 F) |
| 1925 | 38.3 C (100.9 F) |
| 1926 | 35.6 C (96.1 F) |
| 1927 | 35.6 C (96.1 F) |
| 1928 | 35.0 C (95.0 F) |
| 1929 | 37.2 C (99.0 F) |
| 1930 | 36.1 C (97.0 F) |
| 1931 | 38.3 C (100.9 F) |
| 1932 | 34.4 C (93.9 F) |
| 1933 | 36.1 C (97.0 F) |
| 1934 | 36.7 C (98.1 F) |
| 1935 | 36.7 C (98.1 F) |
| 1936 | 36.1 C (97.0 F) |
| 1937 | 36.7 C (98.1 F) |
| 1938 | 36.7 C (98.1 F) |
| 1939 | 39.4 C (102.9 F) |
| 1940 | 38.3 C (100.9 F) |
| 1941 | 36.1 C (97.0 F) |
| 1942 | 37.2 C (99.0 F) |
| 1943 | 35.6 C (96.1 F) |
| 1944 | 35.0 C (95.0 F) |
| 1945 | 36.7 C (98.1 F) |
| 1946 | 36.7 C (98.1 F) |
| 1947 | 36.7 C (98.1 F) |
| 1948 | 36.7 C (98.1 F) |
| 1949 | 38.3 C (100.9 F) |
| 1950 | 36.1 C (97.0 F) |
| 1951 | 38.9 C (102.0 F) |
| 1952 | 36.7 C (98.1 F) |
| 1953 | 38.3 C (100.9 F) |
| 1954 | 40.0 C (104.0 F) |
| 1955 | 37.2 C (99.0 F) |
| 1956 | 37.8 C (100.0 F) |
| 1957 | 36.1 C (97.0 F) |
| 1958 | 36.1 C (97.0 F) |
| 1959 | 38.9 C (102.0 F) |
| 1960 | 38.9 C (102.0 F) |
| 1961 | 37.8 C (100.0 F) |
| 1962 | 36.7 C (98.1 F) |
| 1963 | 37.2 C (99.0 F) |
| 1964 | 39.4 C (102.9 F) |
| 1965 | 35.6 C (96.1 F) |
| 1966 | 37.8 C (100.0 F) |
| 1967 | 35.6 C (96.1 F) |
| 1968 | 36.7 C (98.1 F) |
| 1969 | 38.3 C (100.9 F) |
| 1970 | 38.9 C (102.0 F) |
| 1971 | 36.7 C (98.1 F) |
| 1972 | 36.7 C (98.1 F) |
| 1973 | 38.9 C (102.0 F) |
| 1974 | 37.2 C (99.0 F) |
| 1975 | 36.1 C (97.0 F) |
| 1976 | 38.3 C (100.9 F) |
| 1977 | 37.2 C (99.0 F) |
| 1978 | 38.3 C (100.9 F) |
| 1979 | 38.9 C (102.0 F) |
| 1980 | 36.7 C (98.1 F) |
| 1981 | 38.3 C (100.9 F) |
| 1982 | 40.0 C (104.0 F) |
| 1983 | 37.2 C (99.0 F) |
| 1984 | 36.7 C (98.1 F) |
| 1985 | 36.7 C (98.1 F) |
| 1986 | 38.3 C (100.9 F) |
| 1987 | 36.7 C (98.1 F) |
| 1988 | 39.4 C (102.9 F) |
| 1989 | 38.9 C (102.0 F) |
| 1990 | 40.0 C (104.0 F) |
| 1991 | 38.9 C (102.0 F) |
| 1992 | 36.7 C (98.1 F) |
| 1993 | 36.7 C (98.1 F) |
| 1994 | 37.8 C (100.0 F) |
| 1995 | 37.2 C (99.0 F) |
| 1996 | 37.2 C (99.0 F) |
| 1997 | 36.1 C (97.0 F) |
| 1998 | 37.8 C (100.0 F) |
| 1999 | 36.7 C (98.1 F) |
| 2000 | 37.8 C (100.0 F) |
| 2001 | 37.8 C (100.0 F) |
| 2002 | 38.9 C (102.0 F) |
| 2003 | 38.9 C (102.0 F) |
| 2004 | 35.0 C (95.0 F) |
| 2005 | 40.0 C (104.0 F) |
| 2006 | 39.4 C (102.9 F) |
| 2007 | 38.3 C (100.9 F) |
| 2008 | 37.2 C (99.0 F) |
| 2009 | 36.1 C (97.0 F) |
| 2010 | 36.7 C (98.1 F) |
| 2011 | 36.7 C (98.1 F) |
| 2012 | 38.3 C (100.9 F) |
| 2013 | 36.7 C (98.1 F) |
| 2014 | 36.7 C (98.1 F) |
| 2015 | 36.1 C (97.0 F) |
| 2016 | 36.7 C (98.1 F) |
| 2017 | 36.1 C (97.0 F) |
| 2018 | 37.2 C (99.0 F) |
| 2019 | 36.7 C (98.1 F) |
| 2020 | 36.1 C (97.0 F) |
| 2021 | 38.9 C (102.0 F) |
| 2022 | 37.8 C (100.0 F) |
| 2023 | 35.6 C (96.1 F) |
| 2024 | 37.8 C (100.0 F) |
| 2025 | 37.2 C (99.0 F) |
| 2026 | 41.1 C (106.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1907 | -35.0 C (-31.0 F) |
| 1908 | -31.7 C (-25.1 F) |
| 1909 | -36.1 C (-33.0 F) |
| 1910 | -40.0 C (-40.0 F) |
| 1911 | -33.3 C (-27.9 F) |
| 1912 | -33.3 C (-27.9 F) |
| 1918 | -31.1 C (-24.0 F) |
| 1919 | -40.0 C (-40.0 F) |
| 1920 | -31.1 C (-24.0 F) |
| 1921 | -31.7 C (-25.1 F) |
| 1922 | -25.6 C (-14.1 F) |
| 1923 | -38.3 C (-36.9 F) |
| 1924 | -42.8 C (-45.0 F) |
| 1925 | -23.9 C (-11.0 F) |
| 1926 | -35.0 C (-31.0 F) |
| 1927 | -32.8 C (-27.0 F) |
| 1928 | -31.1 C (-24.0 F) |
| 1929 | -34.4 C (-29.9 F) |
| 1930 | -43.3 C (-45.9 F) |
| 1931 | -32.8 C (-27.0 F) |
| 1932 | -37.2 C (-35.0 F) |
| 1933 | -42.2 C (-44.0 F) |
| 1934 | -25.0 C (-13.0 F) |
| 1935 | -33.9 C (-29.0 F) |
| 1936 | -42.8 C (-45.0 F) |
| 1937 | -37.8 C (-36.0 F) |
| 1938 | -26.1 C (-15.0 F) |
| 1939 | -37.2 C (-35.0 F) |
| 1940 | -33.9 C (-29.0 F) |
| 1941 | -26.7 C (-16.1 F) |
| 1942 | -38.9 C (-38.0 F) |
| 1943 | -39.4 C (-38.9 F) |
| 1944 | -36.1 C (-33.0 F) |
| 1945 | -27.8 C (-18.0 F) |
| 1946 | -32.2 C (-26.0 F) |
| 1947 | -29.4 C (-20.9 F) |
| 1948 | -36.1 C (-33.0 F) |
| 1949 | -41.7 C (-43.1 F) |
| 1950 | -36.1 C (-33.0 F) |
| 1951 | -36.7 C (-34.1 F) |
| 1952 | -32.2 C (-26.0 F) |
| 1953 | -26.1 C (-15.0 F) |
| 1954 | -25.6 C (-14.1 F) |
| 1955 | -28.9 C (-20.0 F) |
| 1956 | -35.0 C (-31.0 F) |
| 1957 | -31.1 C (-24.0 F) |
| 1958 | -25.6 C (-14.1 F) |
| 1959 | -40.0 C (-40.0 F) |
| 1960 | -33.3 C (-27.9 F) |
| 1961 | -32.2 C (-26.0 F) |
| 1962 | -42.8 C (-45.0 F) |
| 1963 | -43.3 C (-45.9 F) |
| 1964 | -35.0 C (-31.0 F) |
| 1965 | -27.2 C (-17.0 F) |
| 1966 | -27.2 C (-17.0 F) |
| 1967 | -30.6 C (-23.1 F) |
| 1968 | -37.2 C (-35.0 F) |
| 1969 | -34.4 C (-29.9 F) |
| 1970 | -30.0 C (-22.0 F) |
| 1971 | -30.0 C (-22.0 F) |
| 1972 | -40.6 C (-41.1 F) |
| 1973 | -31.7 C (-25.1 F) |
| 1974 | -34.4 C (-29.9 F) |
| 1975 | -31.7 C (-25.1 F) |
| 1976 | -35.6 C (-32.1 F) |
| 1977 | -35.0 C (-31.0 F) |
| 1978 | -43.3 C (-45.9 F) |
| 1979 | -43.3 C (-45.9 F) |
| 1980 | -36.1 C (-33.0 F) |
| 1981 | -27.2 C (-17.0 F) |
| 1982 | -32.8 C (-27.0 F) |
| 1983 | -43.3 C (-45.9 F) |
| 1984 | -42.8 C (-45.0 F) |
| 1985 | -36.7 C (-34.1 F) |
| 1986 | -30.6 C (-23.1 F) |
| 1987 | -34.4 C (-29.9 F) |
| 1988 | -34.4 C (-29.9 F) |
| 1989 | -34.4 C (-29.9 F) |
| 1990 | -40.6 C (-41.1 F) |
| 1991 | -31.7 C (-25.1 F) |
| 1992 | -32.8 C (-27.0 F) |
| 1993 | -36.7 C (-34.1 F) |
| 1994 | -27.2 C (-17.0 F) |
| 1995 | -29.4 C (-20.9 F) |
| 1996 | -31.7 C (-25.1 F) |
| 1997 | -23.9 C (-11.0 F) |
| 1998 | -22.8 C (-9.0 F) |
| 1999 | -15.0 C (5.0 F) |
| 2000 | -24.4 C (-11.9 F) |
| 2001 | -30.6 C (-23.1 F) |
| 2002 | -27.8 C (-18.0 F) |
| 2003 | -30.0 C (-22.0 F) |
| 2004 | -30.6 C (-23.1 F) |
| 2005 | -30.6 C (-23.1 F) |
| 2006 | -34.4 C (-29.9 F) |
| 2007 | -30.6 C (-23.1 F) |
| 2008 | -33.3 C (-27.9 F) |
| 2009 | -33.3 C (-27.9 F) |
| 2010 | -31.7 C (-25.1 F) |
| 2011 | -31.1 C (-24.0 F) |
| 2012 | -28.3 C (-18.9 F) |
| 2013 | -30.6 C (-23.1 F) |
| 2014 | -34.4 C (-29.9 F) |
| 2015 | -29.4 C (-20.9 F) |
| 2016 | -32.2 C (-26.0 F) |
| 2017 | -36.1 C (-33.0 F) |
| 2018 | -31.1 C (-24.0 F) |
| 2019 | -28.9 C (-20.0 F) |
| 2020 | -26.7 C (-16.1 F) |
| 2021 | -23.9 C (-11.0 F) |
| 2022 | -39.4 C (-38.9 F) |
| 2023 | -37.8 C (-36.0 F) |
| 2024 | -34.4 C (-29.9 F) |
| 2025 | -31.1 C (-24.0 F) |
| 2026 | -25.0 C (-13.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1907 | 12.7 mm (0.5 in) |
| 1908 | 32.5 mm (1.3 in) |
| 1909 | 19.1 mm (0.8 in) |
| 1910 | 24.9 mm (1.0 in) |
| 1911 | 35.6 mm (1.4 in) |
| 1912 | 77.5 mm (3.1 in) |
| 1918 | 19.6 mm (0.8 in) |
| 1919 | 28.4 mm (1.1 in) |
| 1920 | 19.3 mm (0.8 in) |
| 1921 | 89.7 mm (3.5 in) |
| 1922 | 13.2 mm (0.5 in) |
| 1923 | 54.4 mm (2.1 in) |
| 1924 | 62.7 mm (2.5 in) |
| 1925 | 20.1 mm (0.8 in) |
| 1926 | 24.1 mm (0.9 in) |
| 1927 | 33.8 mm (1.3 in) |
| 1928 | 30.5 mm (1.2 in) |
| 1929 | 35.1 mm (1.4 in) |
| 1930 | 30.5 mm (1.2 in) |
| 1931 | 14.7 mm (0.6 in) |
| 1932 | 19.8 mm (0.8 in) |
| 1933 | 39.1 mm (1.5 in) |
| 1934 | 28.7 mm (1.1 in) |
| 1935 | 21.6 mm (0.9 in) |
| 1936 | 27.7 mm (1.1 in) |
| 1937 | 22.9 mm (0.9 in) |
| 1938 | 23.1 mm (0.9 in) |
| 1939 | 38.4 mm (1.5 in) |
| 1940 | 19.8 mm (0.8 in) |
| 1941 | 32.3 mm (1.3 in) |
| 1942 | 26.7 mm (1.1 in) |
| 1943 | 38.6 mm (1.5 in) |
| 1944 | 30.5 mm (1.2 in) |
| 1945 | 24.6 mm (1.0 in) |
| 1946 | 29.2 mm (1.1 in) |
| 1947 | 51.1 mm (2.0 in) |
| 1948 | 39.4 mm (1.6 in) |
| 1949 | 15.0 mm (0.6 in) |
| 1950 | 39.1 mm (1.5 in) |
| 1951 | 41.4 mm (1.6 in) |
| 1952 | 33.3 mm (1.3 in) |
| 1953 | 18.0 mm (0.7 in) |
| 1954 | 16.3 mm (0.6 in) |
| 1955 | 21.6 mm (0.9 in) |
| 1956 | 42.2 mm (1.7 in) |
| 1957 | 25.4 mm (1.0 in) |
| 1958 | 21.8 mm (0.9 in) |
| 1959 | 19.3 mm (0.8 in) |
| 1960 | 16.3 mm (0.6 in) |
| 1961 | 17.3 mm (0.7 in) |
| 1962 | 27.2 mm (1.1 in) |
| 1963 | 38.6 mm (1.5 in) |
| 1964 | 47.8 mm (1.9 in) |
| 1965 | 15.0 mm (0.6 in) |
| 1966 | 15.2 mm (0.6 in) |
| 1967 | 23.4 mm (0.9 in) |
| 1968 | 23.4 mm (0.9 in) |
| 1969 | 18.3 mm (0.7 in) |
| 1970 | 26.7 mm (1.1 in) |
| 1971 | 38.9 mm (1.5 in) |
| 1972 | 48.0 mm (1.9 in) |
| 1973 | 38.1 mm (1.5 in) |
| 1974 | 8.9 mm (0.35 in) |
| 1975 | 29.7 mm (1.2 in) |
| 1976 | 28.7 mm (1.1 in) |
| 1977 | 48.3 mm (1.9 in) |
| 1978 | 41.1 mm (1.6 in) |
| 1979 | 25.4 mm (1.0 in) |
| 1980 | 37.1 mm (1.5 in) |
| 1981 | 26.4 mm (1.0 in) |
| 1982 | 38.1 mm (1.5 in) |
| 1983 | 24.6 mm (1.0 in) |
| 1984 | 22.9 mm (0.9 in) |
| 1985 | 26.4 mm (1.0 in) |
| 1986 | 16.0 mm (0.6 in) |
| 1987 | 16.3 mm (0.6 in) |
| 1988 | 8.1 mm (0.32 in) |
| 1989 | 27.4 mm (1.1 in) |
| 1990 | 14.0 mm (0.6 in) |
| 1991 | 20.8 mm (0.8 in) |
| 1992 | 17.8 mm (0.7 in) |
| 1993 | 55.9 mm (2.2 in) |
| 1994 | 20.6 mm (0.8 in) |
| 1995 | 35.1 mm (1.4 in) |
| 1996 | 30.5 mm (1.2 in) |
| 1997 | 32.5 mm (1.3 in) |
| 1998 | 27.4 mm (1.1 in) |
| 1999 | 30.0 mm (1.2 in) |
| 2000 | 30.5 mm (1.2 in) |
| 2001 | 19.1 mm (0.8 in) |
| 2002 | 24.6 mm (1.0 in) |
| 2003 | 25.4 mm (1.0 in) |
| 2004 | 21.8 mm (0.9 in) |
| 2005 | 21.8 mm (0.9 in) |
| 2006 | 17.8 mm (0.7 in) |
| 2007 | 33.8 mm (1.3 in) |
| 2008 | 35.6 mm (1.4 in) |
| 2009 | 33.5 mm (1.3 in) |
| 2010 | 52.1 mm (2.1 in) |
| 2011 | 40.6 mm (1.6 in) |
| 2012 | 11.9 mm (0.5 in) |
| 2013 | 39.4 mm (1.6 in) |
| 2014 | 30.5 mm (1.2 in) |
| 2015 | 24.1 mm (0.9 in) |
| 2016 | 36.8 mm (1.4 in) |
| 2017 | 38.1 mm (1.5 in) |
| 2018 | 18.8 mm (0.7 in) |
| 2019 | 23.6 mm (0.9 in) |
| 2020 | 16.3 mm (0.6 in) |
| 2021 | 15.2 mm (0.6 in) |
| 2022 | 30.2 mm (1.2 in) |
| 2023 | 34.8 mm (1.4 in) |
| 2024 | 23.1 mm (0.9 in) |
| 2025 | 19.1 mm (0.8 in) |
| 2026 | 35.6 mm (1.4 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1907 | 17.3 mm (0.7 in) |
| 1908 | 34.0 mm (1.3 in) |
| 1909 | 23.2 mm (0.9 in) |
| 1910 | 28.7 mm (1.1 in) |
| 1911 | 15.2 mm (0.6 in) |
| 1912 | 108.8 mm (4.3 in) |
| 1918 | 20.6 mm (0.8 in) |
| 1919 | 57.1 mm (2.2 in) |
| 1920 | 32.5 mm (1.3 in) |
| 1921 | 96.1 mm (3.8 in) |
| 1922 | 32.5 mm (1.3 in) |
| 1923 | 115.1 mm (4.5 in) |
| 1924 | 108.7 mm (4.3 in) |
| 1925 | 28.0 mm (1.1 in) |
| 1926 | 31.7 mm (1.2 in) |
| 1927 | 43.8 mm (1.7 in) |
| 1928 | 41.1 mm (1.6 in) |
| 1929 | 49.1 mm (1.9 in) |
| 1930 | 63.5 mm (2.5 in) |
| 1931 | 32.5 mm (1.3 in) |
| 1932 | 28.7 mm (1.1 in) |
| 1933 | 60.2 mm (2.4 in) |
| 1934 | 33.5 mm (1.3 in) |
| 1935 | 40.5 mm (1.6 in) |
| 1936 | 41.9 mm (1.6 in) |
| 1937 | 51.1 mm (2.0 in) |
| 1938 | 27.2 mm (1.1 in) |
| 1939 | 47.3 mm (1.9 in) |
| 1940 | 20.8 mm (0.8 in) |
| 1941 | 64.0 mm (2.5 in) |
| 1942 | 59.7 mm (2.4 in) |
| 1943 | 48.0 mm (1.9 in) |
| 1944 | 38.8 mm (1.5 in) |
| 1945 | 43.0 mm (1.7 in) |
| 1946 | 35.6 mm (1.4 in) |
| 1947 | 61.0 mm (2.4 in) |
| 1948 | 47.5 mm (1.9 in) |
| 1949 | 24.1 mm (0.9 in) |
| 1950 | 41.6 mm (1.6 in) |
| 1951 | 44.4 mm (1.7 in) |
| 1952 | 45.5 mm (1.8 in) |
| 1953 | 33.3 mm (1.3 in) |
| 1954 | 17.8 mm (0.7 in) |
| 1955 | 25.9 mm (1.0 in) |
| 1956 | 43.0 mm (1.7 in) |
| 1957 | 65.0 mm (2.6 in) |
| 1958 | 41.4 mm (1.6 in) |
| 1959 | 34.3 mm (1.4 in) |
| 1960 | 29.5 mm (1.2 in) |
| 1961 | 27.3 mm (1.1 in) |
| 1962 | 36.7 mm (1.4 in) |
| 1963 | 53.1 mm (2.1 in) |
| 1964 | 48.8 mm (1.9 in) |
| 1965 | 28.2 mm (1.1 in) |
| 1966 | 21.3 mm (0.8 in) |
| 1967 | 39.7 mm (1.6 in) |
| 1968 | 32.5 mm (1.3 in) |
| 1969 | 44.4 mm (1.7 in) |
| 1970 | 51.6 mm (2.0 in) |
| 1971 | 65.3 mm (2.6 in) |
| 1972 | 49.5 mm (1.9 in) |
| 1973 | 64.9 mm (2.6 in) |
| 1974 | 13.0 mm (0.5 in) |
| 1975 | 49.5 mm (1.9 in) |
| 1976 | 39.9 mm (1.6 in) |
| 1977 | 72.2 mm (2.8 in) |
| 1978 | 66.5 mm (2.6 in) |
| 1979 | 30.5 mm (1.2 in) |
| 1980 | 62.2 mm (2.4 in) |
| 1981 | 26.7 mm (1.1 in) |
| 1982 | 43.7 mm (1.7 in) |
| 1983 | 26.1 mm (1.0 in) |
| 1984 | 26.4 mm (1.0 in) |
| 1985 | 39.3 mm (1.5 in) |
| 1986 | 27.2 mm (1.1 in) |
| 1987 | 17.6 mm (0.7 in) |
| 1988 | 12.9 mm (0.5 in) |
| 1989 | 30.7 mm (1.2 in) |
| 1990 | 19.5 mm (0.8 in) |
| 1991 | 33.2 mm (1.3 in) |
| 1992 | 24.9 mm (1.0 in) |
| 1993 | 78.5 mm (3.1 in) |
| 1994 | 48.5 mm (1.9 in) |
| 1995 | 71.2 mm (2.8 in) |
| 1996 | 43.7 mm (1.7 in) |
| 1997 | 34.5 mm (1.4 in) |
| 1998 | 31.5 mm (1.2 in) |
| 1999 | 69.1 mm (2.7 in) |
| 2000 | 30.5 mm (1.2 in) |
| 2001 | 24.2 mm (1.0 in) |
| 2002 | 26.1 mm (1.0 in) |
| 2003 | 39.1 mm (1.5 in) |
| 2004 | 42.0 mm (1.7 in) |
| 2005 | 30.2 mm (1.2 in) |
| 2006 | 23.6 mm (0.9 in) |
| 2007 | 67.3 mm (2.6 in) |
| 2008 | 91.3 mm (3.6 in) |
| 2009 | 42.9 mm (1.7 in) |
| 2010 | 70.6 mm (2.8 in) |
| 2011 | 73.1 mm (2.9 in) |
| 2012 | 17.9 mm (0.7 in) |
| 2013 | 40.9 mm (1.6 in) |
| 2014 | 33.3 mm (1.3 in) |
| 2015 | 49.2 mm (1.9 in) |
| 2016 | 70.7 mm (2.8 in) |
| 2017 | 84.3 mm (3.3 in) |
| 2018 | 30.3 mm (1.2 in) |
| 2019 | 40.1 mm (1.6 in) |
| 2020 | 27.3 mm (1.1 in) |
| 2021 | 26.2 mm (1.0 in) |
| 2022 | 46.0 mm (1.8 in) |
| 2023 | 42.4 mm (1.7 in) |
| 2024 | 24.4 mm (1.0 in) |
| 2025 | 25.1 mm (1.0 in) |
| 2026 | 39.1 mm (1.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1907 | 64 days |
| 1908 | 34 days |
| 1909 | 26 days |
| 1910 | 43 days |
| 1911 | 27 days |
| 1912 | 40 days |
| 1918 | 33 days |
| 1919 | 35 days |
| 1920 | 32 days |
| 1921 | 53 days |
| 1922 | 48 days |
| 1923 | 26 days |
| 1924 | 62 days |
| 1925 | 44 days |
| 1926 | 40 days |
| 1927 | 49 days |
| 1928 | 46 days |
| 1929 | 54 days |
| 1930 | 55 days |
| 1931 | 47 days |
| 1932 | 38 days |
| 1933 | 57 days |
| 1934 | 37 days |
| 1935 | 43 days |
| 1936 | 37 days |
| 1937 | 38 days |
| 1938 | 34 days |
| 1939 | 54 days |
| 1940 | 39 days |
| 1941 | 29 days |
| 1942 | 35 days |
| 1943 | 37 days |
| 1944 | 55 days |
| 1945 | 34 days |
| 1946 | 62 days |
| 1947 | 42 days |
| 1948 | 32 days |
| 1949 | 61 days |
| 1950 | 62 days |
| 1951 | 43 days |
| 1952 | 48 days |
| 1953 | 70 days |
| 1954 | 66 days |
| 1955 | 43 days |
| 1956 | 43 days |
| 1957 | 62 days |
| 1958 | 61 days |
| 1959 | 45 days |
| 1960 | 74 days |
| 1961 | 52 days |
| 1962 | 88 days |
| 1963 | 62 days |
| 1964 | 40 days |
| 1965 | 38 days |
| 1966 | 31 days |
| 1967 | 54 days |
| 1968 | 62 days |
| 1969 | 63 days |
| 1970 | 39 days |
| 1971 | 43 days |
| 1972 | 34 days |
| 1973 | 45 days |
| 1974 | 42 days |
| 1975 | 43 days |
| 1976 | 46 days |
| 1977 | 60 days |
| 1978 | 29 days |
| 1979 | 49 days |
| 1980 | 31 days |
| 1981 | 67 days |
| 1982 | 44 days |
| 1983 | 28 days |
| 1984 | 51 days |
| 1985 | 50 days |
| 1986 | 31 days |
| 1987 | 37 days |
| 1988 | 47 days |
| 1989 | 39 days |
| 1990 | 64 days |
| 1991 | 37 days |
| 1992 | 47 days |
| 1993 | 35 days |
| 1994 | 53 days |
| 1995 | 34 days |
| 1996 | 51 days |
| 1997 | 24 days |
| 1998 | 23 days |
| 1999 | 44 days |
| 2000 | 43 days |
| 2001 | 53 days |
| 2002 | 28 days |
| 2003 | 41 days |
| 2004 | 38 days |
| 2005 | 59 days |
| 2006 | 52 days |
| 2007 | 33 days |
| 2008 | 42 days |
| 2009 | 41 days |
| 2010 | 47 days |
| 2011 | 30 days |
| 2012 | 54 days |
| 2013 | 39 days |
| 2014 | 30 days |
| 2015 | 34 days |
| 2016 | 48 days |
| 2017 | 30 days |
| 2018 | 44 days |
| 2019 | 30 days |
| 2020 | 43 days |
| 2021 | 65 days |
| 2022 | 56 days |
| 2023 | 28 days |
| 2024 | 51 days |
| 2025 | 46 days |
| 2026 | 49 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
88 years with a frostAcross 88 years with a frost, the median last spring frost at Riverton falls on 19 May and the median first autumn frost on 17 September, which leaves a median of 123 days between them.
In 1984 to 2025 the median growing season was 131 days. That is 7 days more than in 1912 to 1951.
Fitted over all years, the growing season changes by +1.6 days per decade at this station.
| Measure | Median, all years | Earliest period (1912 to 1951) | Recent period (1984 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 19 May | 20 May | 14 May | 6 days earlier | -0.6 days per decade |
| First autumn frost | 17 September | 18 September | 22 September | 4 days later | +1.0 days per decade |
| Growing days | 123 days | 124 days | 131 days | 7 days more | +1.6 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
105 years, 1907 to 2025A day with at least 26.8 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 66.0 mm (2.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 26.8 mm (1.1 in) | |
| 5 years | 37.3 mm (1.5 in) | |
| 10 years | 44.3 mm (1.7 in) | |
| 25 years | 53.1 mm (2.1 in) | |
| 50 years | 59.6 mm (2.3 in) | |
| 100 years | 66.0 mm (2.6 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 105 years of values from 1907 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: 77.5 mm (3.1 in) in 1912; 62.7 mm (2.5 in) in 1924; 55.9 mm (2.2 in) in 1993.
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, Riverton had a mean temperature of 7.1 C (44.8 F) and 255.7 mm (10.1 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Vernal (United States, 304 km away), Myton (United States, 345 km away) and Jordan (United States, 490 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Vernal | United States | 304 km (189 mi) | 7.5 C (45.4 F) | 205.7 mm (8.1 in) | 0.84 |
| Myton | United States | 345 km (214 mi) | 7.6 C (45.6 F) | 169.5 mm (6.7 in) | 0.85 |
| Jordan | United States | 490 km (304 mi) | 7.1 C (44.7 F) | 340.1 mm (13.4 in) | 0.87 |
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-15).