Grinnell 3 SW Threshold Days by Year (USC00133473)
18 fixed thresholds counted per year at Grinnell 3 SW (USC00133473): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Grinnell 3 SW Thresholds
- Grinnell 3 SW: days with a maximum temperature at or above 30 C (86 F) in 99 years, most in 1911 with 77.
- Grinnell 3 SW: days with a maximum temperature at or below 0 C (32 F) in 99 years, most in 1978 with 85.
- Grinnell 3 SW: nights with a minimum temperature at or below 0 C (32 F) in 99 years, most in 1976 with 180.
- Grinnell 3 SW: nights with a minimum temperature at or below -10 C (14 F) in 99 years, most in 1978 with 85.
- 18 fixed thresholds have at least one qualifying day at Grinnell 3 SW.
Days at or above 30 C (86 F)
99 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1905 | 34 | 40.2 |
| 1906 | 39 | 40.2 |
| 1907 | 31 | 40.2 |
| 1908 | 44 | 40.2 |
| 1909 | 53 | 40.2 |
| 1910 | 73 | 60 |
| 1911 | 77 | 60 |
| 1912 | 56 | 60 |
| 1913 | 74 | 60 |
| 1914 | 73 | 60 |
| 1915 | 28 | 60 |
| 1916 | 62 | 60 |
| 1917 | 44 | 60 |
| 1918 | 53 | 60 |
| 1920 | 29 | 47.3 |
| 1922 | 57 | 47.3 |
| 1923 | 53 | 47.3 |
| 1924 | 28 | 47.3 |
| 1925 | 67 | 47.3 |
| 1926 | 57 | 47.3 |
| 1927 | 63 | 47.3 |
| 1928 | 32 | 47.3 |
| 1929 | 40 | 47.3 |
| 1930 | 61 | 54 |
| 1931 | 57 | 54 |
| 1932 | 44 | 54 |
| 1949 | 57 | 57 |
| 1950 | 23 | 48 |
| 1951 | 25 | 48 |
| 1952 | 55 | 48 |
| 1953 | 57 | 48 |
| 1954 | 64 | 48 |
| 1955 | 70 | 48 |
| 1956 | 67 | 48 |
| 1957 | 42 | 48 |
| 1958 | 28 | 48 |
| 1959 | 49 | 48 |
| 1960 | 43 | 36.1 |
| 1961 | 41 | 36.1 |
| 1962 | 44 | 36.1 |
| 1963 | 55 | 36.1 |
| 1964 | 47 | 36.1 |
| 1965 | 20 | 36.1 |
| 1966 | 32 | 36.1 |
| 1967 | 19 | 36.1 |
| 1969 | 24 | 36.1 |
| 1970 | 38 | 35.1 |
| 1971 | 39 | 35.1 |
| 1972 | 33 | 35.1 |
| 1973 | 34 | 35.1 |
| 1974 | 27 | 35.1 |
| 1975 | 46 | 35.1 |
| 1976 | 29 | 35.1 |
| 1977 | 42 | 35.1 |
| 1978 | 38 | 35.1 |
| 1979 | 25 | 35.1 |
| 1980 | 55 | 39.3 |
| 1981 | 22 | 39.3 |
| 1982 | 22 | 39.3 |
| 1983 | 63 | 39.3 |
| 1984 | 32 | 39.3 |
| 1985 | 40 | 39.3 |
| 1986 | 23 | 39.3 |
| 1987 | 44 | 39.3 |
| 1988 | 68 | 39.3 |
| 1989 | 24 | 39.3 |
| 1990 | 25 | 28.2 |
| 1991 | 47 | 28.2 |
| 1992 | 13 | 28.2 |
| 1993 | 12 | 28.2 |
| 1994 | 33 | 28.2 |
| 1995 | 45 | 28.2 |
| 1996 | 18 | 28.2 |
| 1997 | 29 | 28.2 |
| 1998 | 28 | 28.2 |
| 1999 | 32 | 28.2 |
| 2000 | 31 | 29.4 |
| 2001 | 35 | 29.4 |
| 2002 | 41 | 29.4 |
| 2003 | 30 | 29.4 |
| 2004 | 8 | 29.4 |
| 2005 | 47 | 29.4 |
| 2006 | 38 | 29.4 |
| 2007 | 40 | 29.4 |
| 2008 | 15 | 29.4 |
| 2009 | 9 | 29.4 |
| 2010 | 29 | 30.9 |
| 2011 | 40 | 30.9 |
| 2012 | 57 | 30.9 |
| 2013 | 33 | 30.9 |
| 2014 | 7 | 30.9 |
| 2015 | 14 | 30.9 |
| 2016 | 28 | 30.9 |
| 2017 | 34 | 30.9 |
| 2018 | 36 | 30.9 |
| 2023 | 47 | 46 |
| 2024 | 42 | 46 |
| 2025 | 51 | 46 |
| 2026 | 44 | 46 |
| Year | First date | Last date |
|---|---|---|
| 1905 | 1905-06-04 | 1905-09-27 |
| 1906 | 1906-06-06 | 1906-09-19 |
| 1907 | 1907-03-26 | 1907-09-19 |
| 1908 | 1908-06-20 | 1908-09-25 |
| 1909 | 1909-05-05 | 1909-10-02 |
| 1910 | 1910-03-23 | 1910-10-17 |
| 1911 | 1911-05-09 | 1911-09-27 |
| 1912 | 1912-05-22 | 1912-10-05 |
| 1913 | 1913-04-30 | 1913-09-10 |
| 1914 | 1914-04-26 | 1914-09-19 |
| 1915 | 1915-04-20 | 1915-09-13 |
| 1916 | 1916-04-12 | 1916-10-08 |
| 1917 | 1917-05-17 | 1917-09-15 |
| 1918 | 1918-05-03 | 1918-09-02 |
| 1920 | 1920-06-08 | 1920-09-25 |
| 1922 | 1922-05-10 | 1922-10-05 |
| 1923 | 1923-05-31 | 1923-09-26 |
| 1924 | 1924-05-05 | 1924-08-30 |
| 1925 | 1925-04-22 | 1925-09-20 |
| 1926 | 1926-04-30 | 1926-09-21 |
| 1927 | 1927-06-08 | 1927-10-28 |
| 1928 | 1928-05-09 | 1928-10-10 |
| 1929 | 1929-04-04 | 1929-08-31 |
| 1930 | 1930-04-10 | 1930-10-10 |
| 1931 | 1931-04-08 | 1931-09-20 |
| 1932 | 1932-05-13 | 1932-08-30 |
| 1949 | 1949-04-25 | 1949-08-26 |
| 1950 | 1950-05-23 | 1950-10-31 |
| 1951 | 1951-06-01 | 1951-10-04 |
| 1952 | 1952-04-29 | 1952-09-30 |
| 1953 | 1953-05-25 | 1953-10-15 |
| 1954 | 1954-06-09 | 1954-09-27 |
| 1955 | 1955-04-18 | 1955-09-18 |
| 1956 | 1956-05-09 | 1956-10-12 |
| 1957 | 1957-06-05 | 1957-09-01 |
| 1958 | 1958-05-11 | 1958-09-07 |
| 1959 | 1959-05-02 | 1959-09-08 |
| 1960 | 1960-04-22 | 1960-09-08 |
| 1961 | 1961-05-31 | 1961-09-10 |
| 1962 | 1962-05-05 | 1962-09-13 |
| 1963 | 1963-05-09 | 1963-10-07 |
| 1964 | 1964-05-18 | 1964-09-10 |
| 1965 | 1965-05-01 | 1965-09-10 |
| 1966 | 1966-05-06 | 1966-09-02 |
| 1967 | 1967-05-19 | 1967-08-17 |
| 1969 | 1969-05-29 | 1969-09-13 |
| 1970 | 1970-04-29 | 1970-09-21 |
| 1971 | 1971-04-21 | 1971-10-02 |
| 1972 | 1972-05-23 | 1972-09-19 |
| 1973 | 1973-06-08 | 1973-09-02 |
| 1974 | 1974-06-15 | 1974-08-27 |
| 1975 | 1975-05-19 | 1975-10-14 |
| 1976 | 1976-06-09 | 1976-10-03 |
| 1977 | 1977-05-14 | 1977-08-28 |
| 1978 | 1978-05-26 | 1978-09-13 |
| 1979 | 1979-06-07 | 1979-09-12 |
| 1980 | 1980-04-22 | 1980-09-21 |
| 1981 | 1981-06-06 | 1981-09-12 |
| 1982 | 1982-06-29 | 1982-09-12 |
| 1983 | 1983-06-14 | 1983-09-10 |
| 1984 | 1984-06-18 | 1984-09-25 |
| 1985 | 1985-04-19 | 1985-09-20 |
| 1986 | 1986-03-30 | 1986-09-27 |
| 1987 | 1987-04-21 | 1987-09-06 |
| 1988 | 1988-05-15 | 1988-09-18 |
| 1989 | 1989-06-20 | 1989-08-28 |
| 1990 | 1990-06-13 | 1990-09-13 |
| 1991 | 1991-05-14 | 1991-09-14 |
| 1992 | 1992-06-13 | 1992-08-11 |
| 1993 | 1993-06-18 | 1993-09-13 |
| 1994 | 1994-04-19 | 1994-10-01 |
| 1995 | 1995-06-08 | 1995-09-14 |
| 1996 | 1996-05-18 | 1996-08-22 |
| 1997 | 1997-05-19 | 1997-10-07 |
| 1998 | 1998-05-19 | 1998-09-27 |
| 1999 | 1999-06-08 | 1999-09-05 |
| 2000 | 2000-05-12 | 2000-09-19 |
| 2001 | 2001-06-11 | 2001-09-04 |
| 2002 | 2002-05-31 | 2002-10-01 |
| 2003 | 2003-05-31 | 2003-09-12 |
| 2004 | 2004-06-08 | 2004-09-15 |
| 2005 | 2005-06-07 | 2005-10-05 |
| 2006 | 2006-05-28 | 2006-10-04 |
| 2007 | 2007-04-30 | 2007-09-19 |
| 2008 | 2008-06-08 | 2008-09-03 |
| 2009 | 2009-06-19 | 2009-08-14 |
| 2010 | 2010-05-25 | 2010-10-10 |
| 2011 | 2011-05-11 | 2011-09-13 |
| 2012 | 2012-05-16 | 2012-09-13 |
| 2013 | 2013-05-15 | 2013-09-19 |
| 2014 | 2014-06-17 | 2014-09-05 |
| 2015 | 2015-06-10 | 2015-09-07 |
| 2016 | 2016-06-10 | 2016-09-22 |
| 2017 | 2017-05-16 | 2017-09-26 |
| 2018 | 2018-05-25 | 2018-09-21 |
| 2023 | 2023-05-25 | 2023-10-04 |
| 2024 | 2024-04-15 | 2024-10-12 |
| 2025 | 2025-05-15 | 2025-10-05 |
| 2026 | 2026-03-22 | 2026-10-13 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 99 | 77 | 1911 | 44 |
| 35 C (95 F): Days | 67 | 30 | 1913 | 4 |
| 40 C (104 F): Days | 6 | 3 | 1911 | 1 |
| 90 F (32.2 C): Days | 97 | 59 | 1913 | 22 |
| 100 F (37.8 C): Days | 21 | 11 | 1930 | 2 |
| 0 C (32 F): Ice days (max | 99 | 85 | 1978 | 31 |
| 0 C (32 F): Frost days (min | 99 | 180 | 1976 | 92 |
| -10 C (14 F): Days with min | 99 | 85 | 1978 | 33 |
| -20 C (-4 F): Days with min | 99 | 41 | 1978 | 9 |
| -30 C (-22 F): Days with min | 26 | 6 | 1979 | 1 |
| 20 C (68 F): Tropical nights (min | 99 | 34 | 1913 | 29 |
| 25 C (77 F): Days with min | 14 | 4 | 1916 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 73 | 44 | 2010 | 32 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 73 | 19 | 1993 | 16 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 63 | 6 | 2010 | 3 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 6 | 2 | 1970 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 70 | 7 | 1959 | 2 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 6 | 2 | 1951 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1905.
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).