Raleigh 4 SW Threshold Days by Year (USC00317074)
18 fixed thresholds counted per year at Raleigh 4 SW (USC00317074): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Raleigh 4 SW Thresholds
- Raleigh 4 SW: days with 10 mm (0.39 in) or more of precipitation in 85 years, most in 1989 with 56.
- Raleigh 4 SW: days with 25 mm (0.98 in) or more of precipitation in 85 years, most in 1936 with 22.
- Raleigh 4 SW: days with 50 mm (1.97 in) or more of precipitation in 79 years, most in 1995 with 6.
- Raleigh 4 SW: nights with a minimum temperature at or below 0 C (32 F) in 65 years, most in 1978 with 89.
- 18 fixed thresholds have at least one qualifying day at Raleigh 4 SW.
Days at or above 30 C (86 F)
61 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1921 | 101 | 83.8 |
| 1922 | 53 | 83.8 |
| 1923 | 76 | 83.8 |
| 1925 | 105 | 83.8 |
| 1931 | 93 | 91.4 |
| 1932 | 93 | 91.4 |
| 1933 | 109 | 91.4 |
| 1934 | 84 | 91.4 |
| 1935 | 72 | 91.4 |
| 1936 | 100 | 91.4 |
| 1937 | 89 | 91.4 |
| 1956 | 92 | 89.3 |
| 1957 | 92 | 89.3 |
| 1958 | 83 | 89.3 |
| 1959 | 90 | 89.3 |
| 1960 | 83 | 77.1 |
| 1961 | 79 | 77.1 |
| 1962 | 84 | 77.1 |
| 1963 | 78 | 77.1 |
| 1964 | 72 | 77.1 |
| 1965 | 86 | 77.1 |
| 1966 | 76 | 77.1 |
| 1967 | 60 | 77.1 |
| 1968 | 78 | 77.1 |
| 1969 | 75 | 77.1 |
| 1970 | 96 | 79 |
| 1971 | 79 | 79 |
| 1972 | 64 | 79 |
| 1973 | 82 | 79 |
| 1974 | 65 | 79 |
| 1975 | 84 | 79 |
| 1977 | 94 | 79 |
| 1978 | 89 | 79 |
| 1979 | 58 | 79 |
| 1980 | 101 | 82.9 |
| 1981 | 89 | 82.9 |
| 1982 | 72 | 82.9 |
| 1983 | 84 | 82.9 |
| 1984 | 82 | 82.9 |
| 1985 | 89 | 82.9 |
| 1988 | 77 | 82.9 |
| 1989 | 69 | 82.9 |
| 1990 | 82 | 76.3 |
| 1991 | 83 | 76.3 |
| 1992 | 66 | 76.3 |
| 1993 | 91 | 76.3 |
| 1994 | 63 | 76.3 |
| 1995 | 60 | 76.3 |
| 1997 | 72 | 76.3 |
| 1998 | 101 | 76.3 |
| 1999 | 69 | 76.3 |
| 2000 | 70 | 84.8 |
| 2001 | 65 | 84.8 |
| 2002 | 108 | 84.8 |
| 2003 | 60 | 84.8 |
| 2004 | 81 | 84.8 |
| 2005 | 98 | 84.8 |
| 2006 | 81 | 84.8 |
| 2007 | 116 | 84.8 |
| 2008 | 87 | 84.8 |
| 2009 | 82 | 84.8 |
| Year | First date | Last date |
|---|---|---|
| 1921 | 1921-03-21 | 1921-09-30 |
| 1922 | 1922-04-10 | 1922-08-05 |
| 1923 | 1923-05-19 | 1923-09-25 |
| 1925 | 1925-04-14 | 1925-10-17 |
| 1931 | 1931-05-16 | 1931-10-07 |
| 1932 | 1932-04-23 | 1932-10-03 |
| 1933 | 1933-05-11 | 1933-10-01 |
| 1934 | 1934-04-03 | 1934-09-27 |
| 1935 | 1935-04-26 | 1935-09-23 |
| 1936 | 1936-04-15 | 1936-09-27 |
| 1937 | 1937-04-18 | 1937-10-07 |
| 1956 | 1956-04-30 | 1956-09-23 |
| 1957 | 1957-04-21 | 1957-09-22 |
| 1958 | 1958-04-19 | 1958-10-10 |
| 1959 | 1959-04-09 | 1959-10-06 |
| 1960 | 1960-04-23 | 1960-09-20 |
| 1961 | 1961-04-24 | 1961-09-26 |
| 1962 | 1962-04-30 | 1962-10-13 |
| 1963 | 1963-04-03 | 1963-09-21 |
| 1964 | 1964-04-19 | 1964-09-23 |
| 1965 | 1965-04-08 | 1965-09-23 |
| 1966 | 1966-05-29 | 1966-09-12 |
| 1967 | 1967-04-02 | 1967-10-05 |
| 1968 | 1968-03-21 | 1968-10-03 |
| 1969 | 1969-05-05 | 1969-09-16 |
| 1970 | 1970-04-09 | 1970-09-27 |
| 1971 | 1971-04-13 | 1971-09-21 |
| 1972 | 1972-04-15 | 1972-09-19 |
| 1973 | 1973-05-11 | 1973-10-05 |
| 1974 | 1974-03-08 | 1974-09-29 |
| 1975 | 1975-05-21 | 1975-10-14 |
| 1977 | 1977-04-11 | 1977-10-02 |
| 1978 | 1978-05-20 | 1978-09-23 |
| 1979 | 1979-06-02 | 1979-09-22 |
| 1980 | 1980-04-23 | 1980-09-24 |
| 1981 | 1981-04-27 | 1981-10-06 |
| 1982 | 1982-05-07 | 1982-09-18 |
| 1983 | 1983-06-13 | 1983-10-04 |
| 1984 | 1984-04-27 | 1984-10-20 |
| 1985 | 1985-03-29 | 1985-10-16 |
| 1988 | 1988-05-16 | 1988-09-25 |
| 1989 | 1989-04-27 | 1989-10-03 |
| 1990 | 1990-03-12 | 1990-10-08 |
| 1991 | 1991-05-15 | 1991-09-19 |
| 1992 | 1992-05-18 | 1992-09-27 |
| 1993 | 1993-05-29 | 1993-09-26 |
| 1994 | 1994-04-26 | 1994-09-15 |
| 1995 | 1995-04-19 | 1995-08-31 |
| 1997 | 1997-05-18 | 1997-10-08 |
| 1998 | 1998-05-16 | 1998-10-01 |
| 1999 | 1999-04-22 | 1999-09-09 |
| 2000 | 2000-05-06 | 2000-09-25 |
| 2001 | 2001-04-08 | 2001-09-23 |
| 2002 | 2002-04-16 | 2002-10-06 |
| 2003 | 2003-05-08 | 2003-09-04 |
| 2004 | 2004-04-23 | 2004-09-22 |
| 2005 | 2005-05-12 | 2005-09-29 |
| 2006 | 2006-04-15 | 2006-09-24 |
| 2007 | 2007-05-01 | 2007-10-10 |
| 2008 | 2008-05-31 | 2008-09-15 |
| 2009 | 2009-04-24 | 2009-09-25 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 61 | 116 | 2007 | 82 |
| 35 C (95 F): Days | 55 | 32 | 1977 | 2 |
| 40 C (104 F): Days | 2 | 2 | 1932 | 2 |
| 90 F (32.2 C): Days | 61 | 75 | 1933 | 26 |
| 100 F (37.8 C): Days | 17 | 8 | 1932 | 6 |
| 0 C (32 F): Ice days (max | 43 | 7 | 1935 | 3 |
| 0 C (32 F): Frost days (min | 65 | 89 | 1978 | 61 |
| -10 C (14 F): Days with min | 51 | 17 | 1977 | 4 |
| -20 C (-4 F): Days with min | 1 | 1 | 1985 | 1 |
| 20 C (68 F): Tropical nights (min | 65 | 84 | 1959 | 59 |
| 25 C (77 F): Days with min | 23 | 3 | 1988 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 85 | 56 | 1989 | 36 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 85 | 22 | 1936 | 11 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 79 | 6 | 1995 | 3 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 24 | 2 | 1973 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 0 | n/a | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 25 | 2 | 1935 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 3 | 1 | 1933 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1921.
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).