Norfolk Karl Stefan Mem AP Threshold Days by Year (USW00014941)
20 fixed thresholds counted per year at Norfolk Karl Stefan Mem AP (USW00014941): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Norfolk Karl Stefan Mem AP Thresholds
- Norfolk Karl Stefan Mem AP: days with a maximum temperature at or above 30 C (86 F) in 81 years, most in 2012 with 91.
- Norfolk Karl Stefan Mem AP: days with a maximum temperature at or above 90 F (32.2 C) in 81 years, most in 2012 with 65.
- Norfolk Karl Stefan Mem AP: days with a maximum temperature at or below 0 C (32 F) in 81 years, most in 1978 with 82.
- Norfolk Karl Stefan Mem AP: nights with a minimum temperature at or below 0 C (32 F) in 81 years, most in 1970 with 174.
- 20 fixed thresholds have at least one qualifying day at Norfolk Karl Stefan Mem AP.
Days at or above 30 C (86 F)
81 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1946 | 48 | 59 |
| 1947 | 69 | 59 |
| 1948 | 62 | 59 |
| 1949 | 57 | 59 |
| 1950 | 29 | 54 |
| 1951 | 30 | 54 |
| 1952 | 62 | 54 |
| 1953 | 62 | 54 |
| 1954 | 65 | 54 |
| 1955 | 74 | 54 |
| 1956 | 70 | 54 |
| 1957 | 48 | 54 |
| 1958 | 45 | 54 |
| 1959 | 55 | 54 |
| 1960 | 49 | 49.3 |
| 1961 | 53 | 49.3 |
| 1962 | 47 | 49.3 |
| 1963 | 63 | 49.3 |
| 1964 | 53 | 49.3 |
| 1965 | 36 | 49.3 |
| 1966 | 52 | 49.3 |
| 1967 | 44 | 49.3 |
| 1968 | 54 | 49.3 |
| 1969 | 42 | 49.3 |
| 1970 | 64 | 58.2 |
| 1971 | 55 | 58.2 |
| 1972 | 60 | 58.2 |
| 1973 | 57 | 58.2 |
| 1974 | 55 | 58.2 |
| 1975 | 59 | 58.2 |
| 1976 | 70 | 58.2 |
| 1977 | 46 | 58.2 |
| 1978 | 64 | 58.2 |
| 1979 | 52 | 58.2 |
| 1980 | 76 | 60.1 |
| 1981 | 55 | 60.1 |
| 1982 | 27 | 60.1 |
| 1983 | 78 | 60.1 |
| 1984 | 60 | 60.1 |
| 1985 | 46 | 60.1 |
| 1986 | 44 | 60.1 |
| 1987 | 71 | 60.1 |
| 1988 | 78 | 60.1 |
| 1989 | 66 | 60.1 |
| 1990 | 61 | 48.8 |
| 1991 | 73 | 48.8 |
| 1992 | 21 | 48.8 |
| 1993 | 31 | 48.8 |
| 1994 | 58 | 48.8 |
| 1995 | 63 | 48.8 |
| 1996 | 25 | 48.8 |
| 1997 | 51 | 48.8 |
| 1998 | 59 | 48.8 |
| 1999 | 46 | 48.8 |
| 2000 | 60 | 57.6 |
| 2001 | 63 | 57.6 |
| 2002 | 74 | 57.6 |
| 2003 | 61 | 57.6 |
| 2004 | 44 | 57.6 |
| 2005 | 75 | 57.6 |
| 2006 | 71 | 57.6 |
| 2007 | 61 | 57.6 |
| 2008 | 37 | 57.6 |
| 2009 | 30 | 57.6 |
| 2010 | 51 | 53.5 |
| 2011 | 55 | 53.5 |
| 2012 | 91 | 53.5 |
| 2013 | 55 | 53.5 |
| 2014 | 32 | 53.5 |
| 2015 | 43 | 53.5 |
| 2016 | 50 | 53.5 |
| 2017 | 53 | 53.5 |
| 2018 | 53 | 53.5 |
| 2019 | 52 | 53.5 |
| 2020 | 73 | 72.1 |
| 2021 | 70 | 72.1 |
| 2022 | 87 | 72.1 |
| 2023 | 74 | 72.1 |
| 2024 | 62 | 72.1 |
| 2025 | 67 | 72.1 |
| 2026 | 72 | 72.1 |
| Year | First date | Last date |
|---|---|---|
| 1946 | 1946-04-20 | 1946-09-26 |
| 1947 | 1947-05-14 | 1947-10-21 |
| 1948 | 1948-04-18 | 1948-09-19 |
| 1949 | 1949-04-25 | 1949-09-20 |
| 1950 | 1950-04-22 | 1950-10-30 |
| 1951 | 1951-06-16 | 1951-10-02 |
| 1952 | 1952-04-28 | 1952-09-30 |
| 1953 | 1953-05-24 | 1953-10-02 |
| 1954 | 1954-04-14 | 1954-09-27 |
| 1955 | 1955-04-19 | 1955-09-17 |
| 1956 | 1956-05-18 | 1956-10-12 |
| 1957 | 1957-06-04 | 1957-09-01 |
| 1958 | 1958-05-11 | 1958-10-15 |
| 1959 | 1959-05-01 | 1959-09-08 |
| 1960 | 1960-04-21 | 1960-10-11 |
| 1961 | 1961-06-09 | 1961-10-17 |
| 1962 | 1962-04-21 | 1962-10-11 |
| 1963 | 1963-05-07 | 1963-10-06 |
| 1964 | 1964-04-16 | 1964-09-09 |
| 1965 | 1965-04-29 | 1965-08-25 |
| 1966 | 1966-05-04 | 1966-10-08 |
| 1967 | 1967-04-29 | 1967-10-03 |
| 1968 | 1968-03-30 | 1968-09-14 |
| 1969 | 1969-05-26 | 1969-10-03 |
| 1970 | 1970-05-17 | 1970-09-20 |
| 1971 | 1971-06-03 | 1971-09-27 |
| 1972 | 1972-04-06 | 1972-09-19 |
| 1973 | 1973-05-20 | 1973-09-10 |
| 1974 | 1974-05-20 | 1974-10-10 |
| 1975 | 1975-05-04 | 1975-10-13 |
| 1976 | 1976-05-19 | 1976-09-30 |
| 1977 | 1977-04-09 | 1977-09-08 |
| 1978 | 1978-03-31 | 1978-10-20 |
| 1979 | 1979-05-17 | 1979-09-17 |
| 1980 | 1980-04-20 | 1980-10-09 |
| 1981 | 1981-04-25 | 1981-09-29 |
| 1982 | 1982-06-06 | 1982-09-10 |
| 1983 | 1983-05-24 | 1983-09-27 |
| 1984 | 1984-05-31 | 1984-09-23 |
| 1985 | 1985-04-11 | 1985-09-18 |
| 1986 | 1986-03-28 | 1986-09-28 |
| 1987 | 1987-04-19 | 1987-10-04 |
| 1988 | 1988-04-07 | 1988-09-26 |
| 1989 | 1989-04-20 | 1989-10-13 |
| 1990 | 1990-04-22 | 1990-10-05 |
| 1991 | 1991-04-05 | 1991-10-01 |
| 1992 | 1992-04-29 | 1992-10-02 |
| 1993 | 1993-05-14 | 1993-10-07 |
| 1994 | 1994-04-17 | 1994-09-29 |
| 1995 | 1995-06-06 | 1995-10-12 |
| 1996 | 1996-05-16 | 1996-09-04 |
| 1997 | 1997-05-16 | 1997-10-06 |
| 1998 | 1998-05-04 | 1998-09-29 |
| 1999 | 1999-06-04 | 1999-10-27 |
| 2000 | 2000-05-04 | 2000-10-01 |
| 2001 | 2001-04-26 | 2001-10-02 |
| 2002 | 2002-04-15 | 2002-09-30 |
| 2003 | 2003-04-01 | 2003-10-22 |
| 2004 | 2004-04-16 | 2004-09-19 |
| 2005 | 2005-05-20 | 2005-10-18 |
| 2006 | 2006-04-06 | 2006-10-07 |
| 2007 | 2007-04-29 | 2007-10-06 |
| 2008 | 2008-06-14 | 2008-09-26 |
| 2009 | 2009-04-23 | 2009-08-24 |
| 2010 | 2010-05-22 | 2010-10-08 |
| 2011 | 2011-05-08 | 2011-10-04 |
| 2012 | 2012-03-26 | 2012-09-19 |
| 2013 | 2013-04-28 | 2013-09-27 |
| 2014 | 2014-05-20 | 2014-09-26 |
| 2015 | 2015-03-16 | 2015-10-11 |
| 2016 | 2016-05-06 | 2016-09-23 |
| 2017 | 2017-05-07 | 2017-09-23 |
| 2018 | 2018-05-22 | 2018-10-03 |
| 2019 | 2019-04-20 | 2019-09-30 |
| 2020 | 2020-05-01 | 2020-10-09 |
| 2021 | 2021-05-01 | 2021-09-28 |
| 2022 | 2022-04-12 | 2022-10-23 |
| 2023 | 2023-04-11 | 2023-10-02 |
| 2024 | 2024-04-13 | 2024-10-10 |
| 2025 | 2025-03-28 | 2025-10-04 |
| 2026 | 2026-03-21 | 2026-10-11 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 81 | 91 | 2012 | 72 |
| 35 C (95 F): Days | 79 | 38 | 2012 | 12 |
| 40 C (104 F): Days | 21 | 4 | 1947 | 1 |
| 45 C (113 F): Days | 1 | 1 | 1954 | 1 |
| 90 F (32.2 C): Days | 81 | 65 | 2012 | 41 |
| 100 F (37.8 C): Days | 50 | 15 | 1947 | 4 |
| 110 F (43.3 C): Days | 1 | 2 | 1954 | 2 |
| 0 C (32 F): Ice days (max | 81 | 82 | 1978 | 17 |
| 0 C (32 F): Frost days (min | 81 | 174 | 1970 | 92 |
| -10 C (14 F): Days with min | 81 | 91 | 1955 | 30 |
| -20 C (-4 F): Days with min | 81 | 31 | 1978 | 6 |
| -30 C (-22 F): Days with min | 21 | 4 | 1974 | 2 |
| 20 C (68 F): Tropical nights (min | 81 | 48 | 1983 | 23 |
| 25 C (77 F): Days with min | 31 | 9 | 1955 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 81 | 32 | 1977 | 15 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 80 | 12 | 1998 | 4 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 61 | 3 | 1950 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 4 | 1 | 1969 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 62 | 6 | 1960 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 7 | 1 | 1982 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1946.
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).