Keene 3S Threshold Days by Year (USC00324571)
19 fixed thresholds counted per year at Keene 3S (USC00324571): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Keene 3S Thresholds
- Keene 3S: days with 10 mm (0.39 in) or more of precipitation in 67 years, most in 1999 with 19.
- Keene 3S: days with 25 mm (0.98 in) or more of precipitation in 62 years, most in 2019 with 8.
- Keene 3S: nights with a minimum temperature at or below 0 C (32 F) in 59 years, most in 1968 with 209.
- Keene 3S: nights with a minimum temperature at or below -10 C (14 F) in 59 years, most in 1978 with 110.
- 19 fixed thresholds have at least one qualifying day at Keene 3S.
Days at or above 30 C (86 F)
57 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1960 | 41 | 40.3 |
| 1961 | 60 | 40.3 |
| 1967 | 42 | 40.3 |
| 1968 | 18 | 40.3 |
| 1972 | 26 | 34.1 |
| 1973 | 36 | 34.1 |
| 1974 | 41 | 34.1 |
| 1975 | 26 | 34.1 |
| 1976 | 50 | 34.1 |
| 1977 | 27 | 34.1 |
| 1978 | 28 | 34.1 |
| 1979 | 39 | 34.1 |
| 1980 | 55 | 49.6 |
| 1981 | 37 | 49.6 |
| 1984 | 56 | 49.6 |
| 1985 | 34 | 49.6 |
| 1986 | 41 | 49.6 |
| 1987 | 48 | 49.6 |
| 1988 | 70 | 49.6 |
| 1989 | 56 | 49.6 |
| 1990 | 49 | 36.2 |
| 1991 | 39 | 36.2 |
| 1992 | 34 | 36.2 |
| 1993 | 9 | 36.2 |
| 1994 | 30 | 36.2 |
| 1995 | 33 | 36.2 |
| 1996 | 43 | 36.2 |
| 1997 | 46 | 36.2 |
| 1998 | 48 | 36.2 |
| 1999 | 31 | 36.2 |
| 2000 | 38 | 40.2 |
| 2001 | 47 | 40.2 |
| 2002 | 38 | 40.2 |
| 2003 | 44 | 40.2 |
| 2004 | 28 | 40.2 |
| 2005 | 36 | 40.2 |
| 2006 | 58 | 40.2 |
| 2007 | 56 | 40.2 |
| 2008 | 38 | 40.2 |
| 2009 | 19 | 40.2 |
| 2010 | 23 | 32.9 |
| 2011 | 24 | 32.9 |
| 2012 | 43 | 32.9 |
| 2013 | 29 | 32.9 |
| 2014 | 23 | 32.9 |
| 2015 | 47 | 32.9 |
| 2016 | 40 | 32.9 |
| 2017 | 48 | 32.9 |
| 2018 | 32 | 32.9 |
| 2019 | 20 | 32.9 |
| 2020 | 37 | 48 |
| 2021 | 67 | 48 |
| 2022 | 48 | 48 |
| 2023 | 41 | 48 |
| 2024 | 47 | 48 |
| 2025 | 45 | 48 |
| 2026 | 51 | 48 |
| Year | First date | Last date |
|---|---|---|
| 1960 | 1960-05-12 | 1960-09-20 |
| 1961 | 1961-05-29 | 1961-09-16 |
| 1967 | 1967-05-25 | 1967-09-23 |
| 1968 | 1968-05-01 | 1968-09-14 |
| 1972 | 1972-05-16 | 1972-09-19 |
| 1973 | 1973-06-13 | 1973-09-01 |
| 1974 | 1974-06-13 | 1974-08-24 |
| 1975 | 1975-06-24 | 1975-09-16 |
| 1976 | 1976-06-02 | 1976-09-18 |
| 1977 | 1977-05-08 | 1977-07-29 |
| 1978 | 1978-06-08 | 1978-09-11 |
| 1979 | 1979-05-17 | 1979-09-27 |
| 1980 | 1980-04-20 | 1980-10-08 |
| 1981 | 1981-05-22 | 1981-09-18 |
| 1984 | 1984-05-16 | 1984-09-19 |
| 1985 | 1985-05-03 | 1985-08-06 |
| 1986 | 1986-05-04 | 1986-08-31 |
| 1987 | 1987-04-28 | 1987-10-04 |
| 1988 | 1988-05-27 | 1988-09-16 |
| 1989 | 1989-04-22 | 1989-10-01 |
| 1990 | 1990-06-10 | 1990-09-26 |
| 1991 | 1991-05-21 | 1991-09-07 |
| 1992 | 1992-05-06 | 1992-10-02 |
| 1993 | 1993-05-13 | 1993-09-12 |
| 1994 | 1994-06-21 | 1994-09-10 |
| 1995 | 1995-06-14 | 1995-09-04 |
| 1996 | 1996-06-04 | 1996-09-05 |
| 1997 | 1997-05-31 | 1997-10-02 |
| 1998 | 1998-07-08 | 1998-09-17 |
| 1999 | 1999-05-28 | 1999-09-07 |
| 2000 | 2000-06-07 | 2000-09-29 |
| 2001 | 2001-04-28 | 2001-09-06 |
| 2002 | 2002-05-28 | 2002-09-17 |
| 2003 | 2003-05-29 | 2003-10-09 |
| 2004 | 2004-06-06 | 2004-09-19 |
| 2005 | 2005-06-21 | 2005-10-02 |
| 2006 | 2006-05-18 | 2006-09-14 |
| 2007 | 2007-05-10 | 2007-09-23 |
| 2008 | 2008-06-30 | 2008-09-19 |
| 2009 | 2009-07-19 | 2009-09-20 |
| 2010 | 2010-06-30 | 2010-09-28 |
| 2011 | 2011-06-29 | 2011-10-02 |
| 2012 | 2012-04-24 | 2012-09-29 |
| 2013 | 2013-05-13 | 2013-09-06 |
| 2014 | 2014-05-23 | 2014-09-27 |
| 2015 | 2015-06-01 | 2015-09-27 |
| 2016 | 2016-05-05 | 2016-09-02 |
| 2017 | 2017-06-01 | 2017-09-12 |
| 2018 | 2018-05-16 | 2018-09-08 |
| 2019 | 2019-06-03 | 2019-09-16 |
| 2020 | 2020-06-13 | 2020-09-24 |
| 2021 | 2021-04-30 | 2021-10-07 |
| 2022 | 2022-06-18 | 2022-09-19 |
| 2023 | 2023-05-31 | 2023-09-18 |
| 2024 | 2024-05-30 | 2024-09-30 |
| 2025 | 2025-05-04 | 2025-09-28 |
| 2026 | 2026-05-25 | 2026-08-30 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 57 | 70 | 1988 | 51 |
| 35 C (95 F): Days | 53 | 32 | 1988 | 14 |
| 40 C (104 F): Days | 10 | 5 | 2007 | 2 |
| 90 F (32.2 C): Days | 57 | 52 | 1988 | 29 |
| 100 F (37.8 C): Days | 30 | 11 | 1988 | 6 |
| 0 C (32 F): Ice days (max | 57 | 107 | 1978 | 31 |
| 0 C (32 F): Frost days (min | 59 | 209 | 1968 | 116 |
| -10 C (14 F): Days with min | 59 | 110 | 1978 | 39 |
| -20 C (-4 F): Days with min | 59 | 62 | 1978 | 13 |
| -30 C (-22 F): Days with min | 55 | 18 | 1985 | 3 |
| -40 C (-40 F): Days with min | 3 | 1 | 1968 | 1 |
| 20 C (68 F): Tropical nights (min | 40 | 10 | 1988 | 6 |
| 25 C (77 F): Days with min | 4 | 1 | 1984 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 67 | 19 | 1999 | 8 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 62 | 8 | 2019 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 17 | 2 | 1994 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 2019 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 39 | 6 | 1975 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 2 | 1 | 1961 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1960.
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 (2026-10-12).