Colebrook 3SW Threshold Days by Year (USC00271647)
15 fixed thresholds counted per year at Colebrook 3SW (USC00271647): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Colebrook 3SW Thresholds
- Colebrook 3SW: days with a maximum temperature at or below 0 C (32 F) in 58 years, most in 2019 with 99.
- Colebrook 3SW: nights with a minimum temperature at or below 0 C (32 F) in 58 years, most in 2020 with 221.
- Colebrook 3SW: nights with a minimum temperature at or below -10 C (14 F) in 58 years, most in 1978 with 105.
- Colebrook 3SW: nights with a minimum temperature at or below -20 C (-4 F) in 58 years, most in 1989 with 56.
- 15 fixed thresholds have at least one qualifying day at Colebrook 3SW.
Days at or above 30 C (86 F)
57 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1961 | 10 | 5.6 |
| 1962 | 2 | 5.6 |
| 1964 | 8 | 5.6 |
| 1968 | 4 | 5.6 |
| 1969 | 4 | 5.6 |
| 1970 | 8 | 6.6 |
| 1971 | 4 | 6.6 |
| 1972 | 3 | 6.6 |
| 1973 | 6 | 6.6 |
| 1974 | 2 | 6.6 |
| 1975 | 8 | 6.6 |
| 1976 | 7 | 6.6 |
| 1977 | 9 | 6.6 |
| 1978 | 9 | 6.6 |
| 1979 | 10 | 6.6 |
| 1980 | 2 | 6.6 |
| 1981 | 4 | 6.6 |
| 1984 | 8 | 6.6 |
| 1985 | 2 | 6.6 |
| 1986 | 4 | 6.6 |
| 1987 | 10 | 6.6 |
| 1988 | 14 | 6.6 |
| 1989 | 9 | 6.6 |
| 1990 | 4 | 6 |
| 1991 | 5 | 6 |
| 1992 | 2 | 6 |
| 1993 | 5 | 6 |
| 1994 | 6 | 6 |
| 1995 | 10 | 6 |
| 1996 | 1 | 6 |
| 1998 | 4 | 6 |
| 1999 | 17 | 6 |
| 2000 | 1 | 6.9 |
| 2001 | 17 | 6.9 |
| 2002 | 18 | 6.9 |
| 2003 | 6 | 6.9 |
| 2004 | 1 | 6.9 |
| 2005 | 10 | 6.9 |
| 2008 | 1 | 6.9 |
| 2009 | 1 | 6.9 |
| 2010 | 9 | 5 |
| 2011 | 3 | 5 |
| 2012 | 8 | 5 |
| 2013 | 3 | 5 |
| 2014 | 2 | 5 |
| 2015 | 5 | 5 |
| 2016 | 4 | 5 |
| 2017 | 7 | 5 |
| 2018 | 7 | 5 |
| 2019 | 2 | 5 |
| 2020 | 11 | 8.3 |
| 2021 | 15 | 8.3 |
| 2022 | 8 | 8.3 |
| 2023 | 6 | 8.3 |
| 2024 | 4 | 8.3 |
| 2025 | 10 | 8.3 |
| 2026 | 4 | 8.3 |
| Year | First date | Last date |
|---|---|---|
| 1961 | 1961-05-15 | 1961-09-11 |
| 1962 | 1962-05-19 | 1962-05-20 |
| 1964 | 1964-05-23 | 1964-07-28 |
| 1968 | 1968-07-16 | 1968-07-20 |
| 1969 | 1969-06-14 | 1969-07-17 |
| 1970 | 1970-06-03 | 1970-08-16 |
| 1971 | 1971-05-20 | 1971-08-20 |
| 1972 | 1972-07-16 | 1972-08-27 |
| 1973 | 1973-07-09 | 1973-09-06 |
| 1974 | 1974-05-16 | 1974-06-11 |
| 1975 | 1975-05-21 | 1975-08-04 |
| 1976 | 1976-04-20 | 1976-08-23 |
| 1977 | 1977-05-23 | 1977-08-30 |
| 1978 | 1978-05-28 | 1978-08-16 |
| 1979 | 1979-05-10 | 1979-08-03 |
| 1980 | 1980-06-26 | 1980-07-22 |
| 1981 | 1981-06-17 | 1981-07-10 |
| 1984 | 1984-06-08 | 1984-08-14 |
| 1985 | 1985-07-15 | 1985-07-25 |
| 1986 | 1986-07-07 | 1986-08-17 |
| 1987 | 1987-05-31 | 1987-08-17 |
| 1988 | 1988-06-14 | 1988-08-09 |
| 1989 | 1989-05-19 | 1989-09-10 |
| 1990 | 1990-04-27 | 1990-07-30 |
| 1991 | 1991-05-16 | 1991-07-20 |
| 1992 | 1992-05-22 | 1992-05-23 |
| 1993 | 1993-07-06 | 1993-08-26 |
| 1994 | 1994-06-16 | 1994-07-21 |
| 1995 | 1995-06-18 | 1995-08-16 |
| 1996 | 1996-08-07 | 1996-08-07 |
| 1998 | 1998-07-14 | 1998-08-09 |
| 1999 | 1999-05-31 | 1999-09-04 |
| 2000 | 2000-06-27 | 2000-06-27 |
| 2001 | 2001-05-04 | 2001-09-11 |
| 2002 | 2002-06-22 | 2002-09-11 |
| 2003 | 2003-06-25 | 2003-07-06 |
| 2004 | 2004-05-15 | 2004-05-15 |
| 2005 | 2005-06-10 | 2005-08-10 |
| 2008 | 2008-06-09 | 2008-06-09 |
| 2009 | 2009-08-19 | 2009-08-19 |
| 2010 | 2010-05-26 | 2010-09-04 |
| 2011 | 2011-06-09 | 2011-07-22 |
| 2012 | 2012-05-21 | 2012-08-05 |
| 2013 | 2013-07-16 | 2013-07-20 |
| 2014 | 2014-07-02 | 2014-07-03 |
| 2015 | 2015-05-28 | 2015-09-10 |
| 2016 | 2016-05-28 | 2016-08-12 |
| 2017 | 2017-05-19 | 2017-09-28 |
| 2018 | 2018-07-02 | 2018-08-30 |
| 2019 | 2019-07-21 | 2019-07-31 |
| 2020 | 2020-05-28 | 2020-08-12 |
| 2021 | 2021-05-21 | 2021-08-27 |
| 2022 | 2022-05-15 | 2022-08-31 |
| 2023 | 2023-06-02 | 2023-09-08 |
| 2024 | 2024-06-19 | 2024-08-03 |
| 2025 | 2025-06-24 | 2025-08-14 |
| 2026 | 2026-06-13 | 2026-08-08 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 57 | 18 | 2002 | 4 |
| 35 C (95 F): Days | 1 | 1 | 1975 | 1 |
| 90 F (32.2 C): Days | 26 | 6 | 2001 | 2 |
| 0 C (32 F): Ice days (max | 58 | 99 | 2019 | 52 |
| 0 C (32 F): Frost days (min | 58 | 221 | 2020 | 127 |
| -10 C (14 F): Days with min | 58 | 105 | 1978 | 61 |
| -20 C (-4 F): Days with min | 58 | 56 | 1989 | 31 |
| -30 C (-22 F): Days with min | 50 | 17 | 1968 | 2 |
| -40 C (-40 F): Days with min | 3 | 1 | 1962 | 1 |
| 20 C (68 F): Tropical nights (min | 21 | 5 | 1999 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 45 | 55 | 2005 | 21 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 45 | 13 | 1986 | 4 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 18 | 3 | 1991 | 2 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 54 | 15 | 1971 | 3 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 23 | 2 | 1969 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1961.
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).