Duvan Threshold Days by Year (RSM00028537)
14 fixed thresholds counted per year at Duvan (RSM00028537): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Duvan Thresholds
- Duvan: days with a maximum temperature at or below 0 C (32 F) in 81 years, most in 1945 with 160.
- Duvan: days with 10 mm (0.39 in) or more of precipitation in 81 years, most in 2014 with 18.
- Duvan: nights with a minimum temperature at or below 0 C (32 F) in 80 years, most in 1941 with 218.
- Duvan: nights with a minimum temperature at or below -10 C (14 F) in 80 years, most in 1952 with 139.
- 14 fixed thresholds have at least one qualifying day at Duvan.
Days at or above 30 C (86 F)
71 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1938 | 2 | 3.5 |
| 1939 | 5 | 3.5 |
| 1940 | 8 | 4.5 |
| 1941 | 1 | 4.5 |
| 1942 | 4 | 4.5 |
| 1943 | 1 | 4.5 |
| 1944 | 6 | 4.5 |
| 1945 | 1 | 4.5 |
| 1946 | 1 | 4.5 |
| 1947 | 3 | 4.5 |
| 1948 | 9 | 4.5 |
| 1949 | 11 | 4.5 |
| 1950 | 1 | 7 |
| 1951 | 3 | 7 |
| 1952 | 18 | 7 |
| 1953 | 10 | 7 |
| 1954 | 4 | 7 |
| 1955 | 3 | 7 |
| 1956 | 3 | 7 |
| 1957 | 5 | 7 |
| 1958 | 16 | 7 |
| 1960 | 5 | 2.9 |
| 1961 | 1 | 2.9 |
| 1962 | 3 | 2.9 |
| 1963 | 4 | 2.9 |
| 1965 | 3 | 2.9 |
| 1966 | 5 | 2.9 |
| 1968 | 1 | 2.9 |
| 1969 | 1 | 2.9 |
| 1971 | 7 | 3.1 |
| 1972 | 4 | 3.1 |
| 1973 | 1 | 3.1 |
| 1974 | 1 | 3.1 |
| 1975 | 7 | 3.1 |
| 1976 | 1 | 3.1 |
| 1978 | 1 | 3.1 |
| 1981 | 9 | 8.8 |
| 1982 | 10 | 8.8 |
| 1983 | 6 | 8.8 |
| 1984 | 1 | 8.8 |
| 1985 | 3 | 8.8 |
| 1987 | 14 | 8.8 |
| 1988 | 9 | 8.8 |
| 1989 | 18 | 8.8 |
| 1990 | 3 | 8.8 |
| 1991 | 12 | 8.8 |
| 1993 | 1 | 8.8 |
| 1994 | 1 | 8.8 |
| 1995 | 15 | 8.8 |
| 1996 | 11 | 8.8 |
| 1997 | 10 | 8.8 |
| 1998 | 20 | 8.8 |
| 1999 | 6 | 8.8 |
| 2000 | 4 | 4.9 |
| 2001 | 2 | 4.9 |
| 2002 | 5 | 4.9 |
| 2003 | 9 | 4.9 |
| 2004 | 11 | 4.9 |
| 2005 | 4 | 4.9 |
| 2006 | 6 | 4.9 |
| 2007 | 2 | 4.9 |
| 2008 | 2 | 4.9 |
| 2009 | 4 | 4.9 |
| 2010 | 29 | 12.4 |
| 2011 | 11 | 12.4 |
| 2012 | 23 | 12.4 |
| 2013 | 7 | 12.4 |
| 2014 | 1 | 12.4 |
| 2015 | 9 | 12.4 |
| 2016 | 18 | 12.4 |
| 2017 | 1 | 12.4 |
| Year | First date | Last date |
|---|---|---|
| 1938 | 1938-07-07 | 1938-07-08 |
| 1939 | 1939-06-03 | 1939-08-05 |
| 1940 | 1940-07-09 | 1940-08-24 |
| 1941 | 1941-07-16 | 1941-07-16 |
| 1942 | 1942-06-01 | 1942-06-04 |
| 1943 | 1943-05-31 | 1943-05-31 |
| 1944 | 1944-05-24 | 1944-06-26 |
| 1945 | 1945-06-18 | 1945-06-18 |
| 1946 | 1946-06-22 | 1946-06-22 |
| 1947 | 1947-07-13 | 1947-07-15 |
| 1948 | 1948-06-04 | 1948-08-16 |
| 1949 | 1949-06-12 | 1949-08-23 |
| 1950 | 1950-07-15 | 1950-07-15 |
| 1951 | 1951-07-21 | 1951-08-13 |
| 1952 | 1952-05-21 | 1952-08-10 |
| 1953 | 1953-07-14 | 1953-08-10 |
| 1954 | 1954-06-29 | 1954-07-23 |
| 1955 | 1955-06-01 | 1955-06-19 |
| 1956 | 1956-06-27 | 1956-06-30 |
| 1957 | 1957-05-27 | 1957-06-18 |
| 1958 | 1958-06-12 | 1958-08-17 |
| 1960 | 1960-06-18 | 1960-06-25 |
| 1961 | 1961-05-17 | 1961-05-17 |
| 1962 | 1962-07-16 | 1962-07-22 |
| 1963 | 1963-06-18 | 1963-06-24 |
| 1965 | 1965-07-05 | 1965-07-07 |
| 1966 | 1966-07-03 | 1966-08-13 |
| 1968 | 1968-07-21 | 1968-07-21 |
| 1969 | 1969-06-29 | 1969-06-29 |
| 1971 | 1971-06-16 | 1971-07-27 |
| 1972 | 1972-08-14 | 1972-08-29 |
| 1973 | 1973-06-18 | 1973-06-18 |
| 1974 | 1974-07-05 | 1974-07-05 |
| 1975 | 1975-06-29 | 1975-07-19 |
| 1976 | 1976-08-24 | 1976-08-24 |
| 1978 | 1978-06-23 | 1978-06-23 |
| 1981 | 1981-06-15 | 1981-08-30 |
| 1982 | 1982-06-17 | 1982-08-30 |
| 1983 | 1983-07-07 | 1983-08-15 |
| 1984 | 1984-06-11 | 1984-06-11 |
| 1985 | 1985-06-21 | 1985-06-27 |
| 1987 | 1987-06-12 | 1987-08-03 |
| 1988 | 1988-06-04 | 1988-07-24 |
| 1989 | 1989-06-10 | 1989-07-25 |
| 1990 | 1990-06-17 | 1990-07-09 |
| 1991 | 1991-05-30 | 1991-07-25 |
| 1993 | 1993-06-29 | 1993-06-29 |
| 1994 | 1994-06-13 | 1994-06-13 |
| 1995 | 1995-06-19 | 1995-09-10 |
| 1996 | 1996-05-09 | 1996-09-07 |
| 1997 | 1997-05-25 | 1997-08-03 |
| 1998 | 1998-06-06 | 1998-08-07 |
| 1999 | 1999-07-23 | 1999-07-31 |
| 2000 | 2000-06-19 | 2000-08-03 |
| 2001 | 2001-07-22 | 2001-08-02 |
| 2002 | 2002-07-05 | 2002-08-03 |
| 2003 | 2003-08-06 | 2003-09-06 |
| 2004 | 2004-06-01 | 2004-08-24 |
| 2005 | 2005-07-27 | 2005-07-30 |
| 2006 | 2006-05-28 | 2006-07-19 |
| 2007 | 2007-06-19 | 2007-08-20 |
| 2008 | 2008-06-19 | 2008-07-24 |
| 2009 | 2009-06-06 | 2009-06-19 |
| 2010 | 2010-06-04 | 2010-08-30 |
| 2011 | 2011-07-04 | 2011-09-04 |
| 2012 | 2012-06-09 | 2012-08-10 |
| 2013 | 2013-06-18 | 2013-07-06 |
| 2014 | 2014-05-15 | 2014-05-15 |
| 2015 | 2015-05-31 | 2015-06-29 |
| 2016 | 2016-08-01 | 2016-08-24 |
| 2017 | 2017-08-24 | 2017-08-24 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 71 | 29 | 2010 | 1 |
| 35 C (95 F): Days | 8 | 4 | 1952 | 4 |
| 90 F (32.2 C): Days | 45 | 13 | 2012 | 11 |
| 100 F (37.8 C): Days | 1 | 1 | 1940 | 1 |
| 0 C (32 F): Ice days (max | 81 | 160 | 1945 | 145 |
| 0 C (32 F): Frost days (min | 80 | 218 | 1941 | 189 |
| -10 C (14 F): Days with min | 80 | 139 | 1952 | 118 |
| -20 C (-4 F): Days with min | 80 | 77 | 1969 | 29 |
| -30 C (-22 F): Days with min | 78 | 22 | 1940 | 1 |
| -40 C (-40 F): Days with min | 17 | 5 | 1940 | 1 |
| 20 C (68 F): Tropical nights (min | 12 | 3 | 1971 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 81 | 18 | 2014 | 11 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 54 | 4 | 2015 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 4 | 1 | 1944 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1938.
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).