Williamsport Rgnl AP Threshold Days by Year (USW00014778)
18 fixed thresholds counted per year at Williamsport Rgnl AP (USW00014778): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Williamsport Rgnl AP Thresholds
- Williamsport Rgnl AP: days with a maximum temperature at or above 30 C (86 F) in 78 years, most in 1991 with 78.
- Williamsport Rgnl AP: days with a maximum temperature at or below 0 C (32 F) in 78 years, most in 1978 with 59.
- Williamsport Rgnl AP: nights with a minimum temperature at or below 0 C (32 F) in 78 years, most in 1969 with 148.
- Williamsport Rgnl AP: nights with a minimum temperature at or below -10 C (14 F) in 78 years, most in 1977 with 48.
- 18 fixed thresholds have at least one qualifying day at Williamsport Rgnl AP.
Days at or above 30 C (86 F)
78 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1949 | 55 | 55 |
| 1950 | 21 | 42.8 |
| 1951 | 46 | 42.8 |
| 1952 | 49 | 42.8 |
| 1953 | 56 | 42.8 |
| 1954 | 39 | 42.8 |
| 1955 | 62 | 42.8 |
| 1956 | 35 | 42.8 |
| 1957 | 43 | 42.8 |
| 1958 | 25 | 42.8 |
| 1959 | 52 | 42.8 |
| 1960 | 25 | 29.5 |
| 1961 | 38 | 29.5 |
| 1962 | 34 | 29.5 |
| 1963 | 31 | 29.5 |
| 1964 | 39 | 29.5 |
| 1965 | 25 | 29.5 |
| 1966 | 34 | 29.5 |
| 1967 | 17 | 29.5 |
| 1968 | 31 | 29.5 |
| 1969 | 21 | 29.5 |
| 1970 | 33 | 24 |
| 1971 | 26 | 24 |
| 1972 | 13 | 24 |
| 1973 | 23 | 24 |
| 1974 | 19 | 24 |
| 1975 | 15 | 24 |
| 1976 | 24 | 24 |
| 1977 | 36 | 24 |
| 1978 | 32 | 24 |
| 1979 | 19 | 24 |
| 1980 | 45 | 32.5 |
| 1981 | 24 | 32.5 |
| 1982 | 14 | 32.5 |
| 1983 | 32 | 32.5 |
| 1984 | 24 | 32.5 |
| 1985 | 23 | 32.5 |
| 1986 | 27 | 32.5 |
| 1987 | 46 | 32.5 |
| 1988 | 57 | 32.5 |
| 1989 | 33 | 32.5 |
| 1990 | 37 | 41.1 |
| 1991 | 78 | 41.1 |
| 1992 | 29 | 41.1 |
| 1993 | 53 | 41.1 |
| 1994 | 39 | 41.1 |
| 1995 | 59 | 41.1 |
| 1996 | 11 | 41.1 |
| 1997 | 26 | 41.1 |
| 1998 | 38 | 41.1 |
| 1999 | 41 | 41.1 |
| 2000 | 22 | 33.9 |
| 2001 | 36 | 33.9 |
| 2002 | 58 | 33.9 |
| 2003 | 17 | 33.9 |
| 2004 | 17 | 33.9 |
| 2005 | 48 | 33.9 |
| 2006 | 33 | 33.9 |
| 2007 | 55 | 33.9 |
| 2008 | 34 | 33.9 |
| 2009 | 19 | 33.9 |
| 2010 | 59 | 45.3 |
| 2011 | 39 | 45.3 |
| 2012 | 48 | 45.3 |
| 2013 | 39 | 45.3 |
| 2014 | 23 | 45.3 |
| 2015 | 42 | 45.3 |
| 2016 | 74 | 45.3 |
| 2017 | 41 | 45.3 |
| 2018 | 47 | 45.3 |
| 2019 | 41 | 45.3 |
| 2020 | 57 | 48.7 |
| 2021 | 49 | 48.7 |
| 2022 | 57 | 48.7 |
| 2023 | 38 | 48.7 |
| 2024 | 50 | 48.7 |
| 2025 | 50 | 48.7 |
| 2026 | 40 | 48.7 |
| Year | First date | Last date |
|---|---|---|
| 1949 | 1949-05-04 | 1949-08-28 |
| 1950 | 1950-06-06 | 1950-08-28 |
| 1951 | 1951-05-15 | 1951-10-05 |
| 1952 | 1952-06-06 | 1952-09-14 |
| 1953 | 1953-05-10 | 1953-09-30 |
| 1954 | 1954-06-01 | 1954-10-12 |
| 1955 | 1955-05-04 | 1955-08-30 |
| 1956 | 1956-04-28 | 1956-09-23 |
| 1957 | 1957-04-27 | 1957-09-22 |
| 1958 | 1958-04-18 | 1958-09-06 |
| 1959 | 1959-05-07 | 1959-10-05 |
| 1960 | 1960-04-23 | 1960-09-08 |
| 1961 | 1961-06-02 | 1961-09-25 |
| 1962 | 1962-04-26 | 1962-08-31 |
| 1963 | 1963-05-08 | 1963-10-07 |
| 1964 | 1964-05-19 | 1964-09-18 |
| 1965 | 1965-05-03 | 1965-09-22 |
| 1966 | 1966-06-21 | 1966-09-02 |
| 1967 | 1967-06-09 | 1967-08-04 |
| 1968 | 1968-06-06 | 1968-08-25 |
| 1969 | 1969-05-28 | 1969-09-01 |
| 1970 | 1970-05-09 | 1970-09-26 |
| 1971 | 1971-05-19 | 1971-09-10 |
| 1972 | 1972-05-24 | 1972-09-17 |
| 1973 | 1973-06-04 | 1973-09-05 |
| 1974 | 1974-04-28 | 1974-08-23 |
| 1975 | 1975-06-23 | 1975-08-26 |
| 1976 | 1976-04-17 | 1976-09-08 |
| 1977 | 1977-03-30 | 1977-09-05 |
| 1978 | 1978-05-20 | 1978-09-06 |
| 1979 | 1979-05-08 | 1979-08-30 |
| 1980 | 1980-05-05 | 1980-09-22 |
| 1981 | 1981-05-24 | 1981-09-14 |
| 1982 | 1982-07-08 | 1982-09-12 |
| 1983 | 1983-04-28 | 1983-09-20 |
| 1984 | 1984-06-06 | 1984-08-16 |
| 1985 | 1985-04-21 | 1985-09-07 |
| 1986 | 1986-03-30 | 1986-09-30 |
| 1987 | 1987-05-10 | 1987-08-21 |
| 1988 | 1988-05-13 | 1988-08-28 |
| 1989 | 1989-05-18 | 1989-09-10 |
| 1990 | 1990-04-26 | 1990-09-02 |
| 1991 | 1991-05-12 | 1991-09-17 |
| 1992 | 1992-05-02 | 1992-09-10 |
| 1993 | 1993-05-09 | 1993-09-03 |
| 1994 | 1994-04-15 | 1994-08-28 |
| 1995 | 1995-05-24 | 1995-09-07 |
| 1996 | 1996-05-19 | 1996-09-02 |
| 1997 | 1997-06-10 | 1997-08-16 |
| 1998 | 1998-03-30 | 1998-09-27 |
| 1999 | 1999-05-29 | 1999-09-02 |
| 2000 | 2000-05-05 | 2000-09-09 |
| 2001 | 2001-04-23 | 2001-08-16 |
| 2002 | 2002-04-16 | 2002-09-14 |
| 2003 | 2003-06-23 | 2003-08-25 |
| 2004 | 2004-05-10 | 2004-08-29 |
| 2005 | 2005-05-11 | 2005-09-15 |
| 2006 | 2006-05-29 | 2006-08-20 |
| 2007 | 2007-05-15 | 2007-10-09 |
| 2008 | 2008-06-07 | 2008-09-14 |
| 2009 | 2009-04-25 | 2009-08-18 |
| 2010 | 2010-04-06 | 2010-09-24 |
| 2011 | 2011-05-26 | 2011-08-18 |
| 2012 | 2012-04-16 | 2012-09-07 |
| 2013 | 2013-05-21 | 2013-09-11 |
| 2014 | 2014-05-13 | 2014-09-06 |
| 2015 | 2015-05-04 | 2015-09-09 |
| 2016 | 2016-05-25 | 2016-09-23 |
| 2017 | 2017-04-11 | 2017-09-27 |
| 2018 | 2018-05-02 | 2018-09-18 |
| 2019 | 2019-06-25 | 2019-10-02 |
| 2020 | 2020-05-15 | 2020-09-23 |
| 2021 | 2021-05-19 | 2021-09-18 |
| 2022 | 2022-05-21 | 2022-08-29 |
| 2023 | 2023-04-13 | 2023-09-07 |
| 2024 | 2024-04-29 | 2024-09-20 |
| 2025 | 2025-04-19 | 2025-09-28 |
| 2026 | 2026-04-15 | 2026-09-13 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 78 | 78 | 1991 | 40 |
| 35 C (95 F): Days | 51 | 18 | 1988 | 6 |
| 90 F (32.2 C): Days | 77 | 42 | 1988 | 14 |
| 100 F (37.8 C): Days | 12 | 5 | 1988 | 2 |
| 0 C (32 F): Ice days (max | 78 | 59 | 1978 | 28 |
| 0 C (32 F): Frost days (min | 78 | 148 | 1969 | 77 |
| -10 C (14 F): Days with min | 78 | 48 | 1977 | 23 |
| -20 C (-4 F): Days with min | 40 | 7 | 1970 | 1 |
| 20 C (68 F): Tropical nights (min | 78 | 34 | 2021 | 22 |
| 25 C (77 F): Days with min | 2 | 1 | 1995 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 78 | 58 | 2011 | 27 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 78 | 22 | 2018 | 8 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 59 | 7 | 2018 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 8 | 1 | 1955 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 1 | 1972 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 70 | 7 | 1961 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 22 | 2 | 1964 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 1 | 1 | 1972 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.
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).