Ames 8 WSW Threshold Days by Year (USC00130200)
17 fixed thresholds counted per year at Ames 8 WSW (USC00130200): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Ames 8 WSW Thresholds
- Ames 8 WSW: days with a maximum temperature at or above 30 C (86 F) in 62 years, most in 2025 with 77.
- Ames 8 WSW: days with a maximum temperature at or below 0 C (32 F) in 62 years, most in 1978 with 85.
- Ames 8 WSW: nights with a minimum temperature at or below 0 C (32 F) in 62 years, most in 1976 with 161.
- Ames 8 WSW: nights with a minimum temperature at or below -10 C (14 F) in 62 years, most in 1985 with 78.
- 17 fixed thresholds have at least one qualifying day at Ames 8 WSW.
Days at or above 30 C (86 F)
62 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1965 | 29 | 33 |
| 1966 | 40 | 33 |
| 1967 | 23 | 33 |
| 1968 | 41 | 33 |
| 1969 | 32 | 33 |
| 1970 | 56 | 47.3 |
| 1971 | 58 | 47.3 |
| 1972 | 42 | 47.3 |
| 1973 | 37 | 47.3 |
| 1974 | 40 | 47.3 |
| 1975 | 55 | 47.3 |
| 1976 | 47 | 47.3 |
| 1977 | 57 | 47.3 |
| 1978 | 44 | 47.3 |
| 1979 | 37 | 47.3 |
| 1980 | 68 | 48 |
| 1981 | 37 | 48 |
| 1982 | 22 | 48 |
| 1983 | 71 | 48 |
| 1984 | 44 | 48 |
| 1985 | 42 | 48 |
| 1986 | 37 | 48 |
| 1987 | 58 | 48 |
| 1988 | 71 | 48 |
| 1989 | 30 | 48 |
| 1990 | 36 | 33.3 |
| 1991 | 43 | 33.3 |
| 1992 | 15 | 33.3 |
| 1993 | 14 | 33.3 |
| 1994 | 38 | 33.3 |
| 1995 | 40 | 33.3 |
| 1996 | 23 | 33.3 |
| 1997 | 45 | 33.3 |
| 1998 | 42 | 33.3 |
| 1999 | 37 | 33.3 |
| 2000 | 35 | 37.8 |
| 2001 | 47 | 37.8 |
| 2002 | 60 | 37.8 |
| 2003 | 36 | 37.8 |
| 2004 | 16 | 37.8 |
| 2005 | 49 | 37.8 |
| 2006 | 45 | 37.8 |
| 2007 | 54 | 37.8 |
| 2008 | 17 | 37.8 |
| 2009 | 19 | 37.8 |
| 2010 | 42 | 43.7 |
| 2011 | 44 | 43.7 |
| 2012 | 70 | 43.7 |
| 2013 | 52 | 43.7 |
| 2014 | 15 | 43.7 |
| 2015 | 23 | 43.7 |
| 2016 | 43 | 43.7 |
| 2017 | 49 | 43.7 |
| 2018 | 52 | 43.7 |
| 2019 | 47 | 43.7 |
| 2020 | 63 | 64 |
| 2021 | 69 | 64 |
| 2022 | 54 | 64 |
| 2023 | 51 | 64 |
| 2024 | 63 | 64 |
| 2025 | 77 | 64 |
| 2026 | 71 | 64 |
| Year | First date | Last date |
|---|---|---|
| 1965 | 1965-04-30 | 1965-09-09 |
| 1966 | 1966-05-05 | 1966-08-31 |
| 1967 | 1967-04-16 | 1967-10-02 |
| 1968 | 1968-04-11 | 1968-08-24 |
| 1969 | 1969-05-27 | 1969-08-31 |
| 1970 | 1970-04-27 | 1970-09-21 |
| 1971 | 1971-05-14 | 1971-10-01 |
| 1972 | 1972-05-20 | 1972-09-20 |
| 1973 | 1973-06-07 | 1973-08-31 |
| 1974 | 1974-06-03 | 1974-09-26 |
| 1975 | 1975-05-18 | 1975-10-13 |
| 1976 | 1976-05-20 | 1976-10-03 |
| 1977 | 1977-04-09 | 1977-08-27 |
| 1978 | 1978-05-25 | 1978-09-13 |
| 1979 | 1979-05-17 | 1979-09-11 |
| 1980 | 1980-04-20 | 1980-09-20 |
| 1981 | 1981-04-25 | 1981-09-30 |
| 1982 | 1982-05-04 | 1982-09-11 |
| 1983 | 1983-06-09 | 1983-10-03 |
| 1984 | 1984-05-17 | 1984-09-20 |
| 1985 | 1985-04-17 | 1985-09-20 |
| 1986 | 1986-03-29 | 1986-09-26 |
| 1987 | 1987-04-19 | 1987-09-06 |
| 1988 | 1988-05-14 | 1988-09-18 |
| 1989 | 1989-04-24 | 1989-09-01 |
| 1990 | 1990-04-23 | 1990-10-05 |
| 1991 | 1991-04-06 | 1991-09-13 |
| 1992 | 1992-04-30 | 1992-08-10 |
| 1993 | 1993-06-17 | 1993-09-13 |
| 1994 | 1994-04-18 | 1994-10-01 |
| 1995 | 1995-06-07 | 1995-09-14 |
| 1996 | 1996-05-17 | 1996-08-08 |
| 1997 | 1997-05-18 | 1997-10-07 |
| 1998 | 1998-05-17 | 1998-09-27 |
| 1999 | 1999-06-05 | 1999-09-04 |
| 2000 | 2000-05-11 | 2000-09-19 |
| 2001 | 2001-05-14 | 2001-08-30 |
| 2002 | 2002-04-15 | 2002-10-01 |
| 2003 | 2003-04-01 | 2003-10-20 |
| 2004 | 2004-04-16 | 2004-09-02 |
| 2005 | 2005-06-06 | 2005-10-04 |
| 2006 | 2006-04-13 | 2006-10-04 |
| 2007 | 2007-04-29 | 2007-09-21 |
| 2008 | 2008-06-07 | 2008-09-02 |
| 2009 | 2009-04-24 | 2009-08-15 |
| 2010 | 2010-05-24 | 2010-10-09 |
| 2011 | 2011-04-10 | 2011-09-13 |
| 2012 | 2012-05-15 | 2012-09-12 |
| 2013 | 2013-05-14 | 2013-09-19 |
| 2014 | 2014-05-07 | 2014-09-05 |
| 2015 | 2015-06-09 | 2015-09-17 |
| 2016 | 2016-05-30 | 2016-09-23 |
| 2017 | 2017-05-15 | 2017-09-25 |
| 2018 | 2018-05-23 | 2018-10-04 |
| 2019 | 2019-05-16 | 2019-10-02 |
| 2020 | 2020-06-01 | 2020-10-09 |
| 2021 | 2021-04-26 | 2021-09-30 |
| 2022 | 2022-05-09 | 2022-09-21 |
| 2023 | 2023-06-02 | 2023-10-04 |
| 2024 | 2024-05-18 | 2024-10-12 |
| 2025 | 2025-05-10 | 2025-10-04 |
| 2026 | 2026-03-21 | 2026-10-12 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 62 | 77 | 2025 | 71 |
| 35 C (95 F): Days | 37 | 28 | 1988 | 5 |
| 90 F (32.2 C): Days | 59 | 48 | 1988 | 40 |
| 100 F (37.8 C): Days | 7 | 6 | 1988 | 2 |
| 0 C (32 F): Ice days (max | 62 | 85 | 1978 | 24 |
| 0 C (32 F): Frost days (min | 62 | 161 | 1976 | 71 |
| -10 C (14 F): Days with min | 62 | 78 | 1985 | 25 |
| -20 C (-4 F): Days with min | 62 | 28 | 1978 | 4 |
| -30 C (-22 F): Days with min | 15 | 4 | 1996 | 2 |
| 20 C (68 F): Tropical nights (min | 62 | 35 | 2007 | 37 |
| 25 C (77 F): Days with min | 11 | 2 | 1984 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 61 | 45 | 1993 | 36 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 61 | 16 | 1983 | 14 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 52 | 4 | 1987 | 4 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 11 | 1 | 1966 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 52 | 6 | 1971 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 5 | 1 | 1996 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1965.
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).