Riverton Threshold Days by Year (USC00487760)
18 fixed thresholds counted per year at Riverton (USC00487760): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Riverton Thresholds
- Riverton: days with 10 mm (0.39 in) or more of precipitation in 104 years, most in 1912 with 14.
- Riverton: days with a maximum temperature at or above 30 C (86 F) in 99 years, most in 1948 with 82.
- Riverton: days with a maximum temperature at or above 90 F (32.2 C) in 99 years, most in 2012 with 58.
- Riverton: days with a maximum temperature at or below 0 C (32 F) in 99 years, most in 2023 with 94.
- 18 fixed thresholds have at least one qualifying day at Riverton.
Days at or above 30 C (86 F)
99 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1907 | 35 | 38 |
| 1908 | 41 | 38 |
| 1912 | 33 | 53 |
| 1919 | 73 | 53 |
| 1923 | 40 | 40.7 |
| 1924 | 45 | 40.7 |
| 1925 | 40 | 40.7 |
| 1926 | 37 | 40.7 |
| 1927 | 26 | 40.7 |
| 1928 | 36 | 40.7 |
| 1929 | 61 | 40.7 |
| 1930 | 36 | 57.3 |
| 1931 | 62 | 57.3 |
| 1932 | 63 | 57.3 |
| 1933 | 65 | 57.3 |
| 1934 | 54 | 57.3 |
| 1935 | 59 | 57.3 |
| 1936 | 66 | 57.3 |
| 1937 | 61 | 57.3 |
| 1938 | 47 | 57.3 |
| 1939 | 60 | 57.3 |
| 1940 | 71 | 60 |
| 1941 | 41 | 60 |
| 1942 | 52 | 60 |
| 1943 | 65 | 60 |
| 1944 | 44 | 60 |
| 1945 | 53 | 60 |
| 1946 | 63 | 60 |
| 1947 | 67 | 60 |
| 1948 | 82 | 60 |
| 1949 | 62 | 60 |
| 1950 | 48 | 61.5 |
| 1951 | 45 | 61.5 |
| 1952 | 71 | 61.5 |
| 1953 | 72 | 61.5 |
| 1954 | 73 | 61.5 |
| 1955 | 61 | 61.5 |
| 1956 | 67 | 61.5 |
| 1957 | 54 | 61.5 |
| 1958 | 52 | 61.5 |
| 1959 | 72 | 61.5 |
| 1961 | 66 | 55.6 |
| 1962 | 47 | 55.6 |
| 1963 | 60 | 55.6 |
| 1964 | 62 | 55.6 |
| 1965 | 35 | 55.6 |
| 1966 | 66 | 55.6 |
| 1967 | 53 | 55.6 |
| 1968 | 47 | 55.6 |
| 1969 | 64 | 55.6 |
| 1970 | 62 | 57.9 |
| 1971 | 66 | 57.9 |
| 1972 | 41 | 57.9 |
| 1973 | 56 | 57.9 |
| 1974 | 63 | 57.9 |
| 1975 | 53 | 57.9 |
| 1976 | 66 | 57.9 |
| 1978 | 56 | 57.9 |
| 1980 | 64 | 60.6 |
| 1981 | 62 | 60.6 |
| 1982 | 54 | 60.6 |
| 1983 | 60 | 60.6 |
| 1984 | 63 | 60.6 |
| 1990 | 68 | 55 |
| 1991 | 61 | 55 |
| 1992 | 42 | 55 |
| 1993 | 35 | 55 |
| 1994 | 75 | 55 |
| 1995 | 50 | 55 |
| 1996 | 63 | 55 |
| 1997 | 48 | 55 |
| 1998 | 53 | 55 |
| 2000 | 78 | 64.9 |
| 2001 | 79 | 64.9 |
| 2002 | 58 | 64.9 |
| 2003 | 69 | 64.9 |
| 2004 | 38 | 64.9 |
| 2005 | 64 | 64.9 |
| 2006 | 75 | 64.9 |
| 2007 | 80 | 64.9 |
| 2008 | 60 | 64.9 |
| 2009 | 48 | 64.9 |
| 2010 | 53 | 60.9 |
| 2011 | 67 | 60.9 |
| 2012 | 77 | 60.9 |
| 2013 | 81 | 60.9 |
| 2014 | 43 | 60.9 |
| 2015 | 55 | 60.9 |
| 2016 | 66 | 60.9 |
| 2017 | 53 | 60.9 |
| 2018 | 60 | 60.9 |
| 2019 | 54 | 60.9 |
| 2020 | 74 | 62.3 |
| 2021 | 67 | 62.3 |
| 2022 | 65 | 62.3 |
| 2023 | 39 | 62.3 |
| 2024 | 63 | 62.3 |
| 2025 | 67 | 62.3 |
| 2026 | 61 | 62.3 |
| Year | First date | Last date |
|---|---|---|
| 1907 | 1907-06-30 | 1907-09-03 |
| 1908 | 1908-06-25 | 1908-09-16 |
| 1912 | 1912-06-21 | 1912-08-28 |
| 1919 | 1919-05-23 | 1919-09-11 |
| 1923 | 1923-06-12 | 1923-09-08 |
| 1924 | 1924-06-13 | 1924-09-05 |
| 1925 | 1925-05-20 | 1925-09-02 |
| 1926 | 1926-06-05 | 1926-08-30 |
| 1927 | 1927-05-16 | 1927-09-03 |
| 1928 | 1928-05-27 | 1928-09-07 |
| 1929 | 1929-06-14 | 1929-09-02 |
| 1930 | 1930-06-07 | 1930-08-25 |
| 1931 | 1931-06-14 | 1931-09-09 |
| 1932 | 1932-05-21 | 1932-09-14 |
| 1933 | 1933-05-31 | 1933-09-20 |
| 1934 | 1934-05-06 | 1934-09-18 |
| 1935 | 1935-06-08 | 1935-09-18 |
| 1936 | 1936-05-14 | 1936-09-22 |
| 1937 | 1937-05-18 | 1937-09-20 |
| 1938 | 1938-05-27 | 1938-09-29 |
| 1939 | 1939-05-29 | 1939-09-11 |
| 1940 | 1940-05-11 | 1940-09-08 |
| 1941 | 1941-06-17 | 1941-08-29 |
| 1942 | 1942-05-25 | 1942-09-08 |
| 1943 | 1943-05-28 | 1943-09-26 |
| 1944 | 1944-05-14 | 1944-09-13 |
| 1945 | 1945-06-20 | 1945-09-11 |
| 1946 | 1946-06-03 | 1946-09-15 |
| 1947 | 1947-05-02 | 1947-09-26 |
| 1948 | 1948-05-16 | 1948-09-18 |
| 1949 | 1949-06-11 | 1949-09-25 |
| 1950 | 1950-06-06 | 1950-09-08 |
| 1951 | 1951-05-28 | 1951-09-11 |
| 1952 | 1952-06-05 | 1952-09-18 |
| 1953 | 1953-05-07 | 1953-09-17 |
| 1954 | 1954-05-20 | 1954-09-23 |
| 1955 | 1955-06-21 | 1955-09-14 |
| 1956 | 1956-05-20 | 1956-09-27 |
| 1957 | 1957-06-05 | 1957-09-29 |
| 1958 | 1958-05-21 | 1958-09-23 |
| 1959 | 1959-06-06 | 1959-09-15 |
| 1961 | 1961-06-09 | 1961-09-08 |
| 1962 | 1962-05-12 | 1962-09-08 |
| 1963 | 1963-06-14 | 1963-10-01 |
| 1964 | 1964-05-17 | 1964-09-18 |
| 1965 | 1965-06-23 | 1965-08-29 |
| 1966 | 1966-05-05 | 1966-09-24 |
| 1967 | 1967-05-23 | 1967-09-23 |
| 1968 | 1968-06-03 | 1968-09-14 |
| 1969 | 1969-05-25 | 1969-09-07 |
| 1970 | 1970-05-18 | 1970-09-03 |
| 1971 | 1971-05-28 | 1971-09-14 |
| 1972 | 1972-06-01 | 1972-08-30 |
| 1973 | 1973-06-01 | 1973-09-08 |
| 1974 | 1974-06-13 | 1974-09-11 |
| 1975 | 1975-06-25 | 1975-10-07 |
| 1976 | 1976-05-15 | 1976-09-18 |
| 1978 | 1978-06-10 | 1978-09-08 |
| 1980 | 1980-05-22 | 1980-10-01 |
| 1981 | 1981-06-13 | 1981-09-21 |
| 1982 | 1982-06-23 | 1982-09-10 |
| 1983 | 1983-05-27 | 1983-09-17 |
| 1984 | 1984-05-15 | 1984-09-21 |
| 1990 | 1990-05-24 | 1990-09-16 |
| 1991 | 1991-06-12 | 1991-09-04 |
| 1992 | 1992-05-07 | 1992-09-24 |
| 1993 | 1993-06-16 | 1993-09-12 |
| 1994 | 1994-05-23 | 1994-09-29 |
| 1995 | 1995-06-13 | 1995-09-16 |
| 1996 | 1996-06-05 | 1996-09-10 |
| 1997 | 1997-06-01 | 1997-09-11 |
| 1998 | 1998-06-29 | 1998-09-19 |
| 2000 | 2000-05-05 | 2000-09-17 |
| 2001 | 2001-05-13 | 2001-09-29 |
| 2002 | 2002-05-21 | 2002-09-06 |
| 2003 | 2003-05-24 | 2003-09-05 |
| 2004 | 2004-06-04 | 2004-09-19 |
| 2005 | 2005-05-21 | 2005-09-10 |
| 2006 | 2006-05-19 | 2006-09-14 |
| 2007 | 2007-04-30 | 2007-09-23 |
| 2008 | 2008-05-19 | 2008-08-31 |
| 2009 | 2009-05-18 | 2009-09-27 |
| 2010 | 2010-05-29 | 2010-10-04 |
| 2011 | 2011-06-06 | 2011-09-06 |
| 2012 | 2012-04-24 | 2012-09-11 |
| 2013 | 2013-05-14 | 2013-09-08 |
| 2014 | 2014-05-28 | 2014-09-27 |
| 2015 | 2015-06-09 | 2015-09-27 |
| 2016 | 2016-06-07 | 2016-09-21 |
| 2017 | 2017-06-05 | 2017-09-13 |
| 2018 | 2018-05-27 | 2018-09-17 |
| 2019 | 2019-06-27 | 2019-09-17 |
| 2020 | 2020-05-19 | 2020-09-25 |
| 2021 | 2021-06-04 | 2021-09-16 |
| 2022 | 2022-06-11 | 2022-09-09 |
| 2023 | 2023-07-03 | 2023-09-04 |
| 2024 | 2024-06-06 | 2024-09-30 |
| 2025 | 2025-05-13 | 2025-09-12 |
| 2026 | 2026-05-12 | 2026-09-11 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 99 | 82 | 1948 | 61 |
| 35 C (95 F): Days | 97 | 24 | 1919 | 21 |
| 40 C (104 F): Days | 5 | 1 | 1954 | 1 |
| 90 F (32.2 C): Days | 99 | 58 | 2012 | 41 |
| 100 F (37.8 C): Days | 37 | 6 | 1990 | 7 |
| 0 C (32 F): Ice days (max | 99 | 94 | 2023 | 9 |
| 0 C (32 F): Frost days (min | 91 | 227 | 1984 | 99 |
| -10 C (14 F): Days with min | 91 | 122 | 1984 | 22 |
| -20 C (-4 F): Days with min | 91 | 61 | 1944 | 5 |
| -30 C (-22 F): Days with min | 69 | 17 | 1949 | 2 |
| -40 C (-40 F): Days with min | 15 | 3 | 1924 | 2 |
| 20 C (68 F): Tropical nights (min | 9 | 2 | 2012 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 104 | 14 | 1912 | 2 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 59 | 8 | 1912 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 6 | 3 | 1912 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 80 | 8 | 1972 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 18 | 2 | 1971 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 1 | 1 | 2023 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1907.
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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-17).