Durham Threshold Days by Year (USC00312515)

16 fixed thresholds counted per year at Durham (USC00312515): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Durham Thresholds

Durham: days with 10 mm (0.39 in) or more of precipitation in 99 years, most in 1971 with 53.
Durham: days with 25 mm (0.98 in) or more of precipitation in 99 years, most in 2006 with 25.
Durham: days with 50 mm (1.97 in) or more of precipitation in 87 years, most in 2006 with 10.
Durham: days with a maximum temperature at or above 30 C (86 F) in 74 years, most in 1954 with 127.
16 fixed thresholds have at least one qualifying day at Durham.

Days at or above 30 C (86 F)

74 years with a qualifying day

Days per year at Durham with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 127 in 1954.

Days at or above 30 C (86 F) per year at Durham
Year	Days	Decade average
1922	84	82.4
1923	79	82.4
1924	64	82.4
1925	109	82.4
1926	103	82.4
1927	71	82.4
1928	72	82.4
1929	77	82.4
1930	101	96.3
1931	108	96.3
1932	106	96.3
1933	108	96.3
1934	91	96.3
1935	75	96.3
1936	98	96.3
1938	82	96.3
1939	98	96.3
1940	76	86.4
1941	114	86.4
1942	86	86.4
1943	81	86.4
1944	84	86.4
1945	96	86.4
1946	68	86.4
1947	89	86.4
1948	81	86.4
1949	89	86.4
1950	81	97.7
1951	103	97.7
1952	108	97.7
1953	111	97.7
1954	127	97.7
1955	87	97.7
1956	78	97.7
1957	88	97.7
1958	100	97.7
1959	94	97.7
1960	88	82
1961	82	82
1962	88	82
1963	81	82
1964	73	82
1965	92	82
1966	81	82
1967	64	82
1968	87	82
1969	84	82
1970	105	78.8
1971	58	78.8
1972	71	78.8
1973	81	78.8
1974	68	78.8
1975	81	78.8
1976	77	78.8
1977	102	78.8
1978	84	78.8
1979	61	78.8
1980	99	99
1991	100	83.1
1992	55	83.1
1994	92	83.1
1995	90	83.1
1996	101	83.1
1997	89	83.1
1999	55	83.1
2001	39	62.3
2002	80	62.3
2003	49	62.3
2004	55	62.3
2005	78	62.3
2006	62	62.3
2007	95	62.3
2008	61	62.3
2009	42	62.3

For each year, a bar from the first to the last day at Durham meeting 30 C (86 F).

First to last qualifying date each year at Durham
Year	First date	Last date
1922	1922-04-14	1922-10-07
1923	1923-05-20	1923-09-26
1924	1924-04-26	1924-09-14
1925	1925-04-21	1925-10-18
1926	1926-05-02	1926-10-21
1927	1927-04-21	1927-10-02
1928	1928-05-05	1928-09-16
1929	1929-03-24	1929-09-16
1930	1930-04-11	1930-09-26
1931	1931-05-16	1931-10-15
1932	1932-04-23	1932-09-23
1933	1933-05-11	1933-10-01
1934	1934-04-03	1934-09-27
1935	1935-05-03	1935-09-22
1936	1936-04-15	1936-09-28
1938	1938-04-29	1938-10-18
1939	1939-05-11	1939-10-27
1940	1940-05-07	1940-10-26
1941	1941-04-14	1941-10-23
1942	1942-04-05	1942-09-20
1943	1943-04-28	1943-09-23
1944	1944-03-26	1944-10-07
1945	1945-03-17	1945-09-29
1946	1946-04-03	1946-09-23
1947	1947-05-13	1947-10-22
1948	1948-03-20	1948-09-21
1949	1949-04-15	1949-10-10
1950	1950-04-24	1950-11-01
1951	1951-04-26	1951-10-07
1952	1952-04-19	1952-10-02
1953	1953-05-11	1953-10-05
1954	1954-04-07	1954-10-14
1955	1955-04-19	1955-09-20
1956	1956-05-13	1956-09-23
1957	1957-04-22	1957-09-22
1958	1958-04-24	1958-10-10
1959	1959-04-08	1959-10-06
1960	1960-04-13	1960-09-20
1961	1961-04-24	1961-10-13
1962	1962-04-30	1962-10-12
1963	1963-04-03	1963-10-08
1964	1964-04-19	1964-09-23
1965	1965-04-12	1965-09-23
1966	1966-05-19	1966-09-13
1967	1967-04-02	1967-10-05
1968	1968-03-21	1968-10-03
1969	1969-05-04	1969-09-17
1970	1970-04-21	1970-10-04
1971	1971-04-14	1971-09-21
1972	1972-04-16	1972-09-20
1973	1973-05-12	1973-10-06
1974	1974-03-09	1974-11-03
1975	1975-05-21	1975-10-15
1976	1976-03-04	1976-09-14
1977	1977-04-12	1977-10-03
1978	1978-05-21	1978-09-20
1979	1979-05-12	1979-09-23
1980	1980-04-24	1980-09-24
1991	1991-04-08	1991-10-05
1992	1992-04-18	1992-09-23
1994	1994-04-20	1994-09-17
1995	1995-04-20	1995-10-03
1996	1996-04-23	1996-09-30
1997	1997-03-29	1997-10-11
1999	1999-04-05	1999-08-29
2001	2001-04-08	2001-08-28
2002	2002-04-16	2002-10-06
2003	2003-05-02	2003-09-04
2004	2004-05-08	2004-08-23
2005	2005-06-06	2005-09-24
2006	2006-04-16	2006-08-31
2007	2007-05-01	2007-10-10
2008	2008-06-04	2008-09-15
2009	2009-04-25	2009-08-28

Every Fixed Threshold

Fixed thresholds at Durham
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	74	127	1954	42
35 C (95 F): Days	71	42	1954	2
40 C (104 F): Days	6	3	1932	1
90 F (32.2 C): Days	74	86	1954	15
100 F (37.8 C): Days	30	12	1952	5
0 C (32 F): Ice days (max	58	14	1922	3
0 C (32 F): Frost days (min	72	120	1976	75
-10 C (14 F): Days with min	64	22	1977	5
20 C (68 F): Tropical nights (min	72	81	1991	38
25 C (77 F): Days with min	14	4	1991	2
10 mm (0.39 in): Days with 10 mm or more rain	99	53	1971	49
25 mm (0.98 in): Days with 25 mm or more rain	99	25	2006	20
50 mm (1.97 in): Days with 50 mm or more rain	87	10	2006	4
100 mm (3.94 in): Days with 100 mm or more rain	19	2	1989	1
10 cm (3.9 in): Days with 10 cm or more snowfall	32	3	1940	1
25 cm (9.8 in): Days with 25 cm or more snowfall	9	1	1917	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1922.

Download the Data

Data for Durham threshold days by year: CSV or JSON. Field meanings are on the data page.

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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Durham Threshold Days by Year (USC00312515)

Key Facts for Durham Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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