Casper-Natrona Co AP Threshold Days by Year (USW00024089)
18 fixed thresholds counted per year at Casper-Natrona Co AP (USW00024089): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Casper-Natrona Co AP Thresholds
- Casper-Natrona Co AP: days with a maximum temperature at or above 30 C (86 F) in 78 years, most in 1994 with 78.
- Casper-Natrona Co AP: days with a maximum temperature at or above 90 F (32.2 C) in 78 years, most in 1988 with 57.
- Casper-Natrona Co AP: days with a maximum temperature at or below 0 C (32 F) in 78 years, most in 1985 with 71.
- Casper-Natrona Co AP: nights with a minimum temperature at or below 0 C (32 F) in 78 years, most in 2022 with 210.
- 18 fixed thresholds have at least one qualifying day at Casper-Natrona Co AP.
Days at or above 30 C (86 F)
78 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1949 | 54 | 54 |
| 1950 | 31 | 50.7 |
| 1951 | 32 | 50.7 |
| 1952 | 63 | 50.7 |
| 1953 | 59 | 50.7 |
| 1954 | 64 | 50.7 |
| 1955 | 62 | 50.7 |
| 1956 | 57 | 50.7 |
| 1957 | 39 | 50.7 |
| 1958 | 44 | 50.7 |
| 1959 | 56 | 50.7 |
| 1960 | 51 | 46.9 |
| 1961 | 45 | 46.9 |
| 1962 | 32 | 46.9 |
| 1963 | 54 | 46.9 |
| 1964 | 47 | 46.9 |
| 1965 | 25 | 46.9 |
| 1966 | 63 | 46.9 |
| 1967 | 49 | 46.9 |
| 1968 | 38 | 46.9 |
| 1969 | 65 | 46.9 |
| 1970 | 61 | 52.5 |
| 1971 | 64 | 52.5 |
| 1972 | 38 | 52.5 |
| 1973 | 51 | 52.5 |
| 1974 | 50 | 52.5 |
| 1975 | 50 | 52.5 |
| 1976 | 44 | 52.5 |
| 1977 | 58 | 52.5 |
| 1978 | 51 | 52.5 |
| 1979 | 58 | 52.5 |
| 1980 | 63 | 57.3 |
| 1981 | 59 | 57.3 |
| 1982 | 57 | 57.3 |
| 1983 | 63 | 57.3 |
| 1984 | 61 | 57.3 |
| 1985 | 47 | 57.3 |
| 1986 | 43 | 57.3 |
| 1987 | 48 | 57.3 |
| 1988 | 73 | 57.3 |
| 1989 | 59 | 57.3 |
| 1990 | 56 | 55.4 |
| 1991 | 57 | 55.4 |
| 1992 | 45 | 55.4 |
| 1993 | 35 | 55.4 |
| 1994 | 78 | 55.4 |
| 1995 | 58 | 55.4 |
| 1996 | 64 | 55.4 |
| 1997 | 43 | 55.4 |
| 1998 | 63 | 55.4 |
| 1999 | 55 | 55.4 |
| 2000 | 72 | 61.4 |
| 2001 | 75 | 61.4 |
| 2002 | 70 | 61.4 |
| 2003 | 60 | 61.4 |
| 2004 | 37 | 61.4 |
| 2005 | 60 | 61.4 |
| 2006 | 75 | 61.4 |
| 2007 | 68 | 61.4 |
| 2008 | 50 | 61.4 |
| 2009 | 47 | 61.4 |
| 2010 | 53 | 63.4 |
| 2011 | 69 | 63.4 |
| 2012 | 78 | 63.4 |
| 2013 | 76 | 63.4 |
| 2014 | 49 | 63.4 |
| 2015 | 55 | 63.4 |
| 2016 | 64 | 63.4 |
| 2017 | 64 | 63.4 |
| 2018 | 65 | 63.4 |
| 2019 | 61 | 63.4 |
| 2020 | 76 | 65.7 |
| 2021 | 75 | 65.7 |
| 2022 | 67 | 65.7 |
| 2023 | 42 | 65.7 |
| 2024 | 78 | 65.7 |
| 2025 | 60 | 65.7 |
| 2026 | 62 | 65.7 |
| Year | First date | Last date |
|---|---|---|
| 1949 | 1949-06-16 | 1949-09-23 |
| 1950 | 1950-06-06 | 1950-09-06 |
| 1951 | 1951-07-04 | 1951-08-27 |
| 1952 | 1952-06-06 | 1952-09-11 |
| 1953 | 1953-06-09 | 1953-09-15 |
| 1954 | 1954-05-19 | 1954-09-22 |
| 1955 | 1955-06-21 | 1955-09-14 |
| 1956 | 1956-06-01 | 1956-09-20 |
| 1957 | 1957-06-05 | 1957-08-24 |
| 1958 | 1958-05-21 | 1958-09-12 |
| 1959 | 1959-06-06 | 1959-09-13 |
| 1960 | 1960-05-12 | 1960-09-05 |
| 1961 | 1961-06-09 | 1961-08-28 |
| 1962 | 1962-06-26 | 1962-08-27 |
| 1963 | 1963-06-13 | 1963-09-27 |
| 1964 | 1964-05-19 | 1964-09-01 |
| 1965 | 1965-07-04 | 1965-08-28 |
| 1966 | 1966-05-06 | 1966-09-24 |
| 1967 | 1967-05-24 | 1967-09-28 |
| 1968 | 1968-06-03 | 1968-09-11 |
| 1969 | 1969-05-26 | 1969-09-27 |
| 1970 | 1970-06-22 | 1970-09-02 |
| 1971 | 1971-06-16 | 1971-09-13 |
| 1972 | 1972-06-01 | 1972-08-17 |
| 1973 | 1973-06-07 | 1973-09-07 |
| 1974 | 1974-06-13 | 1974-09-10 |
| 1975 | 1975-06-24 | 1975-09-08 |
| 1976 | 1976-06-02 | 1976-09-06 |
| 1977 | 1977-06-01 | 1977-09-08 |
| 1978 | 1978-05-15 | 1978-09-09 |
| 1979 | 1979-06-12 | 1979-09-25 |
| 1980 | 1980-05-22 | 1980-09-30 |
| 1981 | 1981-06-06 | 1981-09-19 |
| 1982 | 1982-06-22 | 1982-09-10 |
| 1983 | 1983-06-21 | 1983-09-16 |
| 1984 | 1984-05-15 | 1984-09-19 |
| 1985 | 1985-06-07 | 1985-08-31 |
| 1986 | 1986-06-02 | 1986-08-29 |
| 1987 | 1987-05-15 | 1987-09-25 |
| 1988 | 1988-05-16 | 1988-09-09 |
| 1989 | 1989-05-23 | 1989-09-05 |
| 1990 | 1990-06-04 | 1990-09-14 |
| 1991 | 1991-06-11 | 1991-09-06 |
| 1992 | 1992-05-06 | 1992-10-02 |
| 1993 | 1993-06-15 | 1993-10-05 |
| 1994 | 1994-05-12 | 1994-09-28 |
| 1995 | 1995-06-12 | 1995-09-17 |
| 1996 | 1996-06-08 | 1996-09-10 |
| 1997 | 1997-06-05 | 1997-09-14 |
| 1998 | 1998-06-28 | 1998-09-18 |
| 1999 | 1999-06-19 | 1999-09-06 |
| 2000 | 2000-05-05 | 2000-09-17 |
| 2001 | 2001-05-13 | 2001-09-28 |
| 2002 | 2002-05-30 | 2002-09-15 |
| 2003 | 2003-05-23 | 2003-09-05 |
| 2004 | 2004-06-03 | 2004-09-18 |
| 2005 | 2005-05-20 | 2005-09-09 |
| 2006 | 2006-05-18 | 2006-09-14 |
| 2007 | 2007-06-15 | 2007-09-22 |
| 2008 | 2008-06-17 | 2008-08-30 |
| 2009 | 2009-05-18 | 2009-09-29 |
| 2010 | 2010-05-28 | 2010-10-03 |
| 2011 | 2011-06-05 | 2011-10-01 |
| 2012 | 2012-05-16 | 2012-09-15 |
| 2013 | 2013-05-13 | 2013-09-08 |
| 2014 | 2014-05-28 | 2014-09-26 |
| 2015 | 2015-06-09 | 2015-09-27 |
| 2016 | 2016-06-07 | 2016-09-20 |
| 2017 | 2017-06-04 | 2017-09-13 |
| 2018 | 2018-05-26 | 2018-09-18 |
| 2019 | 2019-06-26 | 2019-09-19 |
| 2020 | 2020-05-18 | 2020-09-24 |
| 2021 | 2021-06-03 | 2021-09-26 |
| 2022 | 2022-06-11 | 2022-09-08 |
| 2023 | 2023-07-03 | 2023-09-08 |
| 2024 | 2024-05-29 | 2024-09-29 |
| 2025 | 2025-06-01 | 2025-09-11 |
| 2026 | 2026-05-13 | 2026-10-06 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 78 | 78 | 1994 | 62 |
| 35 C (95 F): Days | 76 | 26 | 2012 | 25 |
| 40 C (104 F): Days | 3 | 1 | 1954 | 1 |
| 90 F (32.2 C): Days | 78 | 57 | 1988 | 50 |
| 100 F (37.8 C): Days | 32 | 8 | 2006 | 6 |
| 0 C (32 F): Ice days (max | 78 | 71 | 1985 | 11 |
| 0 C (32 F): Frost days (min | 78 | 210 | 2022 | 97 |
| -10 C (14 F): Days with min | 78 | 80 | 1978 | 19 |
| -20 C (-4 F): Days with min | 78 | 25 | 1985 | 7 |
| -30 C (-22 F): Days with min | 40 | 6 | 1983 | 1 |
| -40 C (-40 F): Days with min | 4 | 2 | 1972 | 1 |
| 20 C (68 F): Tropical nights (min | 22 | 3 | 1964 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 78 | 14 | 1995 | 7 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 37 | 4 | 1971 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 8 | 2 | 2007 | 2 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 71 | 13 | 1975 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 27 | 2 | 1952 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 3 | 1 | 1982 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.
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).