Great Falls AP Threshold Days by Year (USW00024143)
17 fixed thresholds counted per year at Great Falls AP (USW00024143): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Great Falls AP Thresholds
- Great Falls AP: days with a maximum temperature at or above 30 C (86 F) in 89 years, most in 2021 with 58.
- Great Falls AP: days with a maximum temperature at or above 90 F (32.2 C) in 89 years, most in 2022 with 43.
- Great Falls AP: days with a maximum temperature at or below 0 C (32 F) in 89 years, most in 1978 with 84.
- Great Falls AP: nights with a minimum temperature at or below 0 C (32 F) in 89 years, most in 2002 with 184.
- 17 fixed thresholds have at least one qualifying day at Great Falls AP.
Days at or above 30 C (86 F)
89 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1938 | 35 | 43.5 |
| 1939 | 52 | 43.5 |
| 1940 | 54 | 30.3 |
| 1941 | 26 | 30.3 |
| 1942 | 27 | 30.3 |
| 1943 | 31 | 30.3 |
| 1944 | 24 | 30.3 |
| 1945 | 33 | 30.3 |
| 1946 | 28 | 30.3 |
| 1947 | 31 | 30.3 |
| 1948 | 21 | 30.3 |
| 1949 | 28 | 30.3 |
| 1950 | 17 | 26.4 |
| 1951 | 17 | 26.4 |
| 1952 | 24 | 26.4 |
| 1953 | 26 | 26.4 |
| 1954 | 26 | 26.4 |
| 1955 | 29 | 26.4 |
| 1956 | 30 | 26.4 |
| 1957 | 28 | 26.4 |
| 1958 | 34 | 26.4 |
| 1959 | 33 | 26.4 |
| 1960 | 39 | 38.8 |
| 1961 | 51 | 38.8 |
| 1962 | 27 | 38.8 |
| 1963 | 42 | 38.8 |
| 1964 | 37 | 38.8 |
| 1965 | 31 | 38.8 |
| 1966 | 43 | 38.8 |
| 1967 | 53 | 38.8 |
| 1968 | 21 | 38.8 |
| 1969 | 44 | 38.8 |
| 1970 | 46 | 37.5 |
| 1971 | 49 | 37.5 |
| 1972 | 32 | 37.5 |
| 1973 | 48 | 37.5 |
| 1974 | 41 | 37.5 |
| 1975 | 20 | 37.5 |
| 1976 | 36 | 37.5 |
| 1977 | 30 | 37.5 |
| 1978 | 29 | 37.5 |
| 1979 | 44 | 37.5 |
| 1980 | 23 | 33.5 |
| 1981 | 34 | 33.5 |
| 1982 | 18 | 33.5 |
| 1983 | 33 | 33.5 |
| 1984 | 48 | 33.5 |
| 1985 | 35 | 33.5 |
| 1986 | 30 | 33.5 |
| 1987 | 31 | 33.5 |
| 1988 | 56 | 33.5 |
| 1989 | 27 | 33.5 |
| 1990 | 41 | 29.9 |
| 1991 | 36 | 29.9 |
| 1992 | 29 | 29.9 |
| 1993 | 4 | 29.9 |
| 1994 | 44 | 29.9 |
| 1995 | 16 | 29.9 |
| 1996 | 34 | 29.9 |
| 1997 | 22 | 29.9 |
| 1998 | 41 | 29.9 |
| 1999 | 32 | 29.9 |
| 2000 | 43 | 40.4 |
| 2001 | 53 | 40.4 |
| 2002 | 22 | 40.4 |
| 2003 | 54 | 40.4 |
| 2004 | 25 | 40.4 |
| 2005 | 37 | 40.4 |
| 2006 | 51 | 40.4 |
| 2007 | 55 | 40.4 |
| 2008 | 33 | 40.4 |
| 2009 | 31 | 40.4 |
| 2010 | 25 | 40.1 |
| 2011 | 49 | 40.1 |
| 2012 | 54 | 40.1 |
| 2013 | 51 | 40.1 |
| 2014 | 33 | 40.1 |
| 2015 | 41 | 40.1 |
| 2016 | 36 | 40.1 |
| 2017 | 50 | 40.1 |
| 2018 | 32 | 40.1 |
| 2019 | 30 | 40.1 |
| 2020 | 38 | 44.1 |
| 2021 | 58 | 44.1 |
| 2022 | 57 | 44.1 |
| 2023 | 34 | 44.1 |
| 2024 | 42 | 44.1 |
| 2025 | 40 | 44.1 |
| 2026 | 40 | 44.1 |
| Year | First date | Last date |
|---|---|---|
| 1938 | 1938-07-10 | 1938-09-24 |
| 1939 | 1939-04-29 | 1939-09-05 |
| 1940 | 1940-05-10 | 1940-09-13 |
| 1941 | 1941-05-12 | 1941-08-22 |
| 1942 | 1942-07-02 | 1942-09-05 |
| 1943 | 1943-07-06 | 1943-10-04 |
| 1944 | 1944-05-15 | 1944-09-13 |
| 1945 | 1945-06-21 | 1945-09-04 |
| 1946 | 1946-06-03 | 1946-09-14 |
| 1947 | 1947-07-02 | 1947-09-04 |
| 1948 | 1948-06-08 | 1948-09-14 |
| 1949 | 1949-06-09 | 1949-09-23 |
| 1950 | 1950-06-30 | 1950-09-04 |
| 1951 | 1951-07-13 | 1951-08-22 |
| 1952 | 1952-06-05 | 1952-09-26 |
| 1953 | 1953-07-09 | 1953-09-15 |
| 1954 | 1954-05-19 | 1954-08-30 |
| 1955 | 1955-06-22 | 1955-09-06 |
| 1956 | 1956-05-31 | 1956-09-19 |
| 1957 | 1957-06-05 | 1957-10-01 |
| 1958 | 1958-05-20 | 1958-09-11 |
| 1959 | 1959-06-12 | 1959-09-13 |
| 1960 | 1960-05-11 | 1960-09-03 |
| 1961 | 1961-05-26 | 1961-08-29 |
| 1962 | 1962-06-24 | 1962-08-26 |
| 1963 | 1963-06-18 | 1963-09-30 |
| 1964 | 1964-05-19 | 1964-09-17 |
| 1965 | 1965-06-10 | 1965-08-19 |
| 1966 | 1966-05-06 | 1966-09-23 |
| 1967 | 1967-05-21 | 1967-09-29 |
| 1968 | 1968-06-19 | 1968-09-11 |
| 1969 | 1969-05-24 | 1969-09-12 |
| 1970 | 1970-06-03 | 1970-08-31 |
| 1971 | 1971-05-27 | 1971-09-10 |
| 1972 | 1972-05-30 | 1972-08-29 |
| 1973 | 1973-05-16 | 1973-09-06 |
| 1974 | 1974-06-11 | 1974-09-25 |
| 1975 | 1975-07-04 | 1975-09-15 |
| 1976 | 1976-05-27 | 1976-09-16 |
| 1977 | 1977-06-01 | 1977-09-14 |
| 1978 | 1978-06-05 | 1978-09-04 |
| 1979 | 1979-05-26 | 1979-10-04 |
| 1980 | 1980-04-20 | 1980-09-07 |
| 1981 | 1981-06-26 | 1981-09-18 |
| 1982 | 1982-07-13 | 1982-09-09 |
| 1983 | 1983-06-10 | 1983-09-01 |
| 1984 | 1984-05-29 | 1984-09-18 |
| 1985 | 1985-05-02 | 1985-08-25 |
| 1986 | 1986-05-29 | 1986-08-29 |
| 1987 | 1987-04-28 | 1987-09-13 |
| 1988 | 1988-05-16 | 1988-09-06 |
| 1989 | 1989-06-29 | 1989-08-22 |
| 1990 | 1990-06-23 | 1990-09-25 |
| 1991 | 1991-07-03 | 1991-09-06 |
| 1992 | 1992-05-06 | 1992-10-01 |
| 1993 | 1993-06-21 | 1993-08-10 |
| 1994 | 1994-06-20 | 1994-09-25 |
| 1995 | 1995-07-08 | 1995-09-04 |
| 1996 | 1996-06-07 | 1996-08-30 |
| 1997 | 1997-06-26 | 1997-09-03 |
| 1998 | 1998-07-09 | 1998-09-17 |
| 1999 | 1999-05-25 | 1999-09-23 |
| 2000 | 2000-06-05 | 2000-09-17 |
| 2001 | 2001-05-12 | 2001-09-27 |
| 2002 | 2002-05-20 | 2002-09-16 |
| 2003 | 2003-05-28 | 2003-09-07 |
| 2004 | 2004-06-05 | 2004-09-01 |
| 2005 | 2005-06-21 | 2005-09-08 |
| 2006 | 2006-05-16 | 2006-09-06 |
| 2007 | 2007-06-20 | 2007-09-04 |
| 2008 | 2008-06-29 | 2008-09-19 |
| 2009 | 2009-06-25 | 2009-09-24 |
| 2010 | 2010-06-28 | 2010-10-03 |
| 2011 | 2011-06-28 | 2011-10-03 |
| 2012 | 2012-05-15 | 2012-09-18 |
| 2013 | 2013-06-28 | 2013-09-16 |
| 2014 | 2014-07-02 | 2014-09-25 |
| 2015 | 2015-06-08 | 2015-09-25 |
| 2016 | 2016-06-07 | 2016-09-01 |
| 2017 | 2017-05-05 | 2017-09-11 |
| 2018 | 2018-06-09 | 2018-09-07 |
| 2019 | 2019-07-10 | 2019-09-16 |
| 2020 | 2020-06-12 | 2020-09-12 |
| 2021 | 2021-06-02 | 2021-09-26 |
| 2022 | 2022-06-17 | 2022-09-28 |
| 2023 | 2023-06-30 | 2023-09-17 |
| 2024 | 2024-06-14 | 2024-09-25 |
| 2025 | 2025-05-10 | 2025-09-29 |
| 2026 | 2026-05-13 | 2026-09-25 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 89 | 58 | 2021 | 40 |
| 35 C (95 F): Days | 82 | 21 | 2007 | 8 |
| 40 C (104 F): Days | 8 | 3 | 2007 | 3 |
| 90 F (32.2 C): Days | 89 | 43 | 2022 | 23 |
| 100 F (37.8 C): Days | 37 | 8 | 2003 | 2 |
| 0 C (32 F): Ice days (max | 89 | 84 | 1978 | 15 |
| 0 C (32 F): Frost days (min | 89 | 184 | 2002 | 97 |
| -10 C (14 F): Days with min | 89 | 90 | 1978 | 18 |
| -20 C (-4 F): Days with min | 89 | 47 | 1996 | 7 |
| -30 C (-22 F): Days with min | 64 | 12 | 1969 | 3 |
| -40 C (-40 F): Days with min | 2 | 1 | 1968 | 1 |
| 20 C (68 F): Tropical nights (min | 35 | 4 | 1945 | 3 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 89 | 21 | 1975 | 11 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 61 | 5 | 1953 | 5 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 11 | 3 | 1953 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 84 | 10 | 2019 | 5 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 11 | 2 | 1989 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1938.
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).