Harrold 12 SSW Threshold Days by Year (USC00393608)
21 fixed thresholds counted per year at Harrold 12 SSW (USC00393608): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Harrold 12 SSW Thresholds
- Harrold 12 SSW: nights with a minimum temperature at or below 0 C (32 F) in 42 years, most in 2013 with 202.
- Harrold 12 SSW: nights with a minimum temperature at or below -10 C (14 F) in 42 years, most in 1964 with 111.
- Harrold 12 SSW: nights with a minimum temperature at or below -20 C (-4 F) in 42 years, most in 1985 with 48.
- Harrold 12 SSW: days with a maximum temperature at or above 30 C (86 F) in 41 years, most in 1988 with 94.
- 21 fixed thresholds have at least one qualifying day at Harrold 12 SSW.
Days at or above 30 C (86 F)
41 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1964 | 66 | 60 |
| 1965 | 53 | 60 |
| 1966 | 71 | 60 |
| 1967 | 60 | 60 |
| 1968 | 47 | 60 |
| 1969 | 63 | 60 |
| 1970 | 87 | 70.7 |
| 1971 | 82 | 70.7 |
| 1972 | 59 | 70.7 |
| 1976 | 88 | 70.7 |
| 1977 | 55 | 70.7 |
| 1979 | 53 | 70.7 |
| 1980 | 73 | 70.3 |
| 1981 | 56 | 70.3 |
| 1982 | 49 | 70.3 |
| 1983 | 73 | 70.3 |
| 1984 | 76 | 70.3 |
| 1985 | 62 | 70.3 |
| 1986 | 60 | 70.3 |
| 1987 | 80 | 70.3 |
| 1988 | 94 | 70.3 |
| 1989 | 80 | 70.3 |
| 1990 | 70 | 46.8 |
| 1991 | 55 | 46.8 |
| 1992 | 27 | 46.8 |
| 1993 | 23 | 46.8 |
| 1994 | 53 | 46.8 |
| 1995 | 53 | 46.8 |
| 2004 | 40 | 55.2 |
| 2005 | 68 | 55.2 |
| 2006 | 73 | 55.2 |
| 2007 | 67 | 55.2 |
| 2008 | 52 | 55.2 |
| 2009 | 31 | 55.2 |
| 2010 | 40 | 50.6 |
| 2011 | 47 | 50.6 |
| 2012 | 73 | 50.6 |
| 2013 | 45 | 50.6 |
| 2014 | 28 | 50.6 |
| 2015 | 54 | 50.6 |
| 2016 | 67 | 50.6 |
| Year | First date | Last date |
|---|---|---|
| 1964 | 1964-04-16 | 1964-10-15 |
| 1965 | 1965-04-29 | 1965-09-11 |
| 1966 | 1966-05-04 | 1966-09-13 |
| 1967 | 1967-04-28 | 1967-10-03 |
| 1968 | 1968-04-30 | 1968-10-13 |
| 1969 | 1969-05-14 | 1969-09-28 |
| 1970 | 1970-04-07 | 1970-10-06 |
| 1971 | 1971-04-15 | 1971-09-14 |
| 1972 | 1972-05-15 | 1972-09-20 |
| 1976 | 1976-05-19 | 1976-10-12 |
| 1977 | 1977-04-10 | 1977-09-09 |
| 1979 | 1979-05-29 | 1979-10-01 |
| 1980 | 1980-05-21 | 1980-10-10 |
| 1981 | 1981-04-26 | 1981-09-29 |
| 1982 | 1982-05-04 | 1982-09-11 |
| 1983 | 1983-05-27 | 1983-09-28 |
| 1984 | 1984-05-16 | 1984-09-22 |
| 1985 | 1985-04-18 | 1985-09-19 |
| 1986 | 1986-04-24 | 1986-09-26 |
| 1987 | 1987-04-18 | 1987-10-05 |
| 1988 | 1988-03-28 | 1988-09-27 |
| 1989 | 1989-04-21 | 1989-10-25 |
| 1990 | 1990-04-22 | 1990-10-27 |
| 1991 | 1991-04-06 | 1991-10-17 |
| 1992 | 1992-04-06 | 1992-10-23 |
| 1993 | 1993-06-22 | 1993-10-07 |
| 1994 | 1994-04-19 | 1994-09-21 |
| 1995 | 1995-06-07 | 1995-10-13 |
| 2004 | 2004-04-29 | 2004-09-20 |
| 2005 | 2005-06-07 | 2005-10-03 |
| 2006 | 2006-05-19 | 2006-10-08 |
| 2007 | 2007-05-14 | 2007-09-30 |
| 2008 | 2008-04-16 | 2008-09-26 |
| 2009 | 2009-04-23 | 2009-09-09 |
| 2010 | 2010-05-23 | 2010-10-08 |
| 2011 | 2011-06-07 | 2011-10-06 |
| 2012 | 2012-03-19 | 2012-09-25 |
| 2013 | 2013-05-14 | 2013-10-01 |
| 2014 | 2014-05-28 | 2014-09-28 |
| 2015 | 2015-05-03 | 2015-10-12 |
| 2016 | 2016-05-07 | 2016-09-28 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 41 | 94 | 1988 | 67 |
| 35 C (95 F): Days | 41 | 51 | 1976 | 18 |
| 40 C (104 F): Days | 22 | 17 | 1976 | 1 |
| 45 C (113 F): Days | 3 | 1 | 1965 | 1 |
| 90 F (32.2 C): Days | 41 | 70 | 1976 | 40 |
| 100 F (37.8 C): Days | 38 | 31 | 1976 | 4 |
| 110 F (43.3 C): Days | 8 | 4 | 1988 | 3 |
| 0 C (32 F): Ice days (max | 41 | 89 | 2010 | 58 |
| 0 C (32 F): Frost days (min | 42 | 202 | 2013 | 170 |
| -10 C (14 F): Days with min | 42 | 111 | 1964 | 60 |
| -20 C (-4 F): Days with min | 42 | 48 | 1985 | 17 |
| -30 C (-22 F): Days with min | 36 | 11 | 1979 | 3 |
| -40 C (-40 F): Days with min | 2 | 2 | 1994 | 2 |
| 20 C (68 F): Tropical nights (min | 39 | 20 | 1988 | 6 |
| 25 C (77 F): Days with min | 8 | 2 | 1988 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 40 | 25 | 1995 | 13 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 38 | 7 | 1995 | 4 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 11 | 2 | 1983 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1969 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 39 | 11 | 1985 | 3 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 12 | 3 | 1995 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1964.
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 (2025-12-31).