Harrisburg 12WNW Threshold Days by Year (USC00253605)
17 fixed thresholds counted per year at Harrisburg 12WNW (USC00253605): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Harrisburg 12WNW Thresholds
- Harrisburg 12WNW: days with 10 mm (0.39 in) or more of precipitation in 105 years, most in 1915 with 22.
- Harrisburg 12WNW: days with 25 mm (0.98 in) or more of precipitation in 90 years, most in 2005 with 7.
- Harrisburg 12WNW: days with 10 cm (3.9 in) or more of snowfall in 78 years, most in 1912 with 11.
- Harrisburg 12WNW: days with a maximum temperature at or above 30 C (86 F) in 65 years, most in 2012 with 87.
- 17 fixed thresholds have at least one qualifying day at Harrisburg 12WNW.
Days at or above 30 C (86 F)
65 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1962 | 42 | 47.3 |
| 1963 | 73 | 47.3 |
| 1964 | 36 | 47.3 |
| 1965 | 26 | 47.3 |
| 1966 | 68 | 47.3 |
| 1967 | 39 | 47.3 |
| 1968 | 37 | 47.3 |
| 1969 | 57 | 47.3 |
| 1970 | 60 | 50.2 |
| 1971 | 45 | 50.2 |
| 1972 | 39 | 50.2 |
| 1973 | 43 | 50.2 |
| 1974 | 51 | 50.2 |
| 1975 | 51 | 50.2 |
| 1976 | 57 | 50.2 |
| 1977 | 49 | 50.2 |
| 1978 | 58 | 50.2 |
| 1979 | 49 | 50.2 |
| 1980 | 65 | 56 |
| 1981 | 52 | 56 |
| 1982 | 47 | 56 |
| 1983 | 57 | 56 |
| 1984 | 53 | 56 |
| 1985 | 59 | 56 |
| 1986 | 46 | 56 |
| 1987 | 50 | 56 |
| 1988 | 70 | 56 |
| 1989 | 61 | 56 |
| 1990 | 50 | 53.1 |
| 1991 | 54 | 53.1 |
| 1992 | 34 | 53.1 |
| 1993 | 32 | 53.1 |
| 1994 | 64 | 53.1 |
| 1995 | 56 | 53.1 |
| 1996 | 59 | 53.1 |
| 1997 | 61 | 53.1 |
| 1998 | 63 | 53.1 |
| 1999 | 58 | 53.1 |
| 2000 | 84 | 65.3 |
| 2001 | 76 | 65.3 |
| 2002 | 74 | 65.3 |
| 2003 | 66 | 65.3 |
| 2004 | 53 | 65.3 |
| 2005 | 62 | 65.3 |
| 2006 | 68 | 65.3 |
| 2007 | 79 | 65.3 |
| 2008 | 52 | 65.3 |
| 2009 | 39 | 65.3 |
| 2010 | 66 | 64 |
| 2011 | 65 | 64 |
| 2012 | 87 | 64 |
| 2013 | 74 | 64 |
| 2014 | 60 | 64 |
| 2015 | 57 | 64 |
| 2016 | 58 | 64 |
| 2017 | 62 | 64 |
| 2018 | 63 | 64 |
| 2019 | 48 | 64 |
| 2020 | 79 | 68.4 |
| 2021 | 79 | 68.4 |
| 2022 | 79 | 68.4 |
| 2023 | 50 | 68.4 |
| 2024 | 74 | 68.4 |
| 2025 | 47 | 68.4 |
| 2026 | 71 | 68.4 |
| Year | First date | Last date |
|---|---|---|
| 1962 | 1962-04-21 | 1962-10-11 |
| 1963 | 1963-05-08 | 1963-10-10 |
| 1964 | 1964-05-17 | 1964-09-26 |
| 1965 | 1965-07-05 | 1965-10-10 |
| 1966 | 1966-05-05 | 1966-09-25 |
| 1967 | 1967-05-24 | 1967-10-04 |
| 1968 | 1968-06-04 | 1968-09-14 |
| 1969 | 1969-05-26 | 1969-09-29 |
| 1970 | 1970-05-18 | 1970-09-20 |
| 1971 | 1971-06-17 | 1971-09-14 |
| 1972 | 1972-05-18 | 1972-09-19 |
| 1973 | 1973-06-01 | 1973-08-31 |
| 1974 | 1974-05-20 | 1974-09-27 |
| 1975 | 1975-05-17 | 1975-10-07 |
| 1976 | 1976-05-15 | 1976-09-11 |
| 1977 | 1977-06-02 | 1977-09-09 |
| 1978 | 1978-05-15 | 1978-09-11 |
| 1979 | 1979-06-06 | 1979-09-20 |
| 1980 | 1980-06-05 | 1980-10-01 |
| 1981 | 1981-05-03 | 1981-09-30 |
| 1982 | 1982-05-28 | 1982-09-11 |
| 1983 | 1983-05-27 | 1983-09-27 |
| 1984 | 1984-05-21 | 1984-09-20 |
| 1985 | 1985-05-09 | 1985-09-19 |
| 1986 | 1986-06-04 | 1986-08-31 |
| 1987 | 1987-04-19 | 1987-09-26 |
| 1988 | 1988-05-01 | 1988-09-18 |
| 1989 | 1989-04-22 | 1989-10-01 |
| 1990 | 1990-06-05 | 1990-09-26 |
| 1991 | 1991-05-10 | 1991-10-17 |
| 1992 | 1992-05-01 | 1992-10-03 |
| 1993 | 1993-05-27 | 1993-10-06 |
| 1994 | 1994-05-17 | 1994-09-30 |
| 1995 | 1995-06-14 | 1995-09-18 |
| 1996 | 1996-04-11 | 1996-10-12 |
| 1997 | 1997-05-17 | 1997-10-03 |
| 1998 | 1998-05-18 | 1998-09-29 |
| 1999 | 1999-06-05 | 1999-10-12 |
| 2000 | 2000-05-05 | 2000-10-02 |
| 2001 | 2001-05-14 | 2001-09-28 |
| 2002 | 2002-05-22 | 2002-09-17 |
| 2003 | 2003-05-29 | 2003-09-17 |
| 2004 | 2004-05-06 | 2004-09-19 |
| 2005 | 2005-05-20 | 2005-10-03 |
| 2006 | 2006-05-19 | 2006-09-15 |
| 2007 | 2007-05-12 | 2007-10-02 |
| 2008 | 2008-05-19 | 2008-09-27 |
| 2009 | 2009-05-19 | 2009-09-30 |
| 2010 | 2010-05-23 | 2010-09-29 |
| 2011 | 2011-06-03 | 2011-10-05 |
| 2012 | 2012-04-25 | 2012-09-17 |
| 2013 | 2013-05-14 | 2013-09-23 |
| 2014 | 2014-05-29 | 2014-09-28 |
| 2015 | 2015-06-03 | 2015-10-12 |
| 2016 | 2016-06-09 | 2016-09-21 |
| 2017 | 2017-06-06 | 2017-09-22 |
| 2018 | 2018-05-27 | 2018-09-24 |
| 2019 | 2019-06-27 | 2019-09-30 |
| 2020 | 2020-05-20 | 2020-10-09 |
| 2021 | 2021-06-05 | 2021-09-29 |
| 2022 | 2022-04-23 | 2022-09-29 |
| 2023 | 2023-04-12 | 2023-10-02 |
| 2024 | 2024-06-06 | 2024-10-05 |
| 2025 | 2025-04-12 | 2025-10-04 |
| 2026 | 2026-03-22 | 2026-08-31 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 65 | 87 | 2012 | 71 |
| 35 C (95 F): Days | 63 | 44 | 2012 | 24 |
| 40 C (104 F): Days | 7 | 4 | 2012 | 2 |
| 90 F (32.2 C): Days | 65 | 67 | 2000 | 50 |
| 100 F (37.8 C): Days | 36 | 11 | 2012 | 5 |
| 0 C (32 F): Ice days (max | 65 | 54 | 1978 | 8 |
| 0 C (32 F): Frost days (min | 65 | 203 | 1970 | 91 |
| -10 C (14 F): Days with min | 65 | 78 | 1978 | 18 |
| -20 C (-4 F): Days with min | 64 | 24 | 2014 | 4 |
| -30 C (-22 F): Days with min | 39 | 5 | 1983 | 1 |
| -40 C (-40 F): Days with min | 1 | 1 | 1989 | 1 |
| 20 C (68 F): Tropical nights (min | 22 | 3 | 2012 | 5 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 105 | 22 | 1915 | 4 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 90 | 7 | 2005 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 20 | 2 | 1912 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 78 | 11 | 1912 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 13 | 2 | 1959 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1962.
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).