Darlington Wwtp Threshold Days by Year

19 fixed thresholds counted per year at Darlington Wwtp (USC00472001): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Darlington Wwtp Thresholds

Darlington Wwtp: days with a maximum temperature at or above 30 C (86 F) in 104 years, most in 1988 with 65.
Darlington Wwtp: days with a maximum temperature at or below 0 C (32 F) in 104 years, most in 1978 with 80.
Darlington Wwtp: days with 10 mm (0.39 in) or more of precipitation in 103 years, most in 2018 with 46.
Darlington Wwtp: days with 25 mm (0.98 in) or more of precipitation in 102 years, most in 1913 with 15.
19 fixed thresholds have at least one qualifying day at Darlington Wwtp.

Days at or above 30 C (86 F)

104 years with a qualifying day

Days per year at Darlington Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 65 in 1988.

Days at or above 30 C (86 F) per year at Darlington Wwtp
Year	Days	Decade average
1902	11	17
1903	12	17
1904	28	17
1911	53	40.2
1912	37	40.2
1913	44	40.2
1914	55	40.2
1915	14	40.2
1916	55	40.2
1917	25	40.2
1918	35	40.2
1919	44	40.2
1920	29	28.9
1921	47	28.9
1922	36	28.9
1923	52	28.9
1924	20	28.9
1925	32	28.9
1926	11	28.9
1927	26	28.9
1928	16	28.9
1929	20	28.9
1930	39	48.2
1931	61	48.2
1932	40	48.2
1933	63	48.2
1934	63	48.2
1935	36	48.2
1936	59	48.2
1938	24	48.2
1939	49	48.2
1940	32	30.5
1941	42	30.5
1942	25	30.5
1943	36	30.5
1944	27	30.5
1945	20	30.5
1946	23	30.5
1947	41	30.5
1948	28	30.5
1949	31	30.5
1950	8	29
1951	4	29
1952	40	29
1953	35	29
1954	38	29
1955	54	29
1956	29	29
1957	26	29
1958	17	29
1959	39	29
1960	22	26.2
1961	24	26.2
1962	21	26.2
1963	39	26.2
1964	35	26.2
1965	21	26.2
1967	17	26.2
1968	31	26.2
1969	26	26.2
1970	37	32.7
1971	42	32.7
1972	32	32.7
1973	36	32.7
1974	20	32.7
1975	39	32.7
1976	46	32.7
1977	28	32.7
1978	31	32.7
1979	16	32.7
1980	31	30.4
1981	14	30.4
1982	10	30.4
1983	53	30.4
1984	29	30.4
1985	23	30.4
1986	19	30.4
1987	37	30.4
1988	65	30.4
1989	23	30.4
1990	13	21.4
1991	34	21.4
1992	11	21.4
1993	13	21.4
1997	16	21.4
1998	33	21.4
1999	30	21.4
2001	28	31.5
2002	35	31.5
2011	39	30
2012	61	30
2013	29	30
2014	9	30
2015	20	30
2016	24	30
2018	38	30
2019	20	30
2020	28	33.3
2021	45	33.3
2022	30	33.3
2023	38	33.3
2024	31	33.3
2025	35	33.3
2026	26	33.3

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

First to last qualifying date each year at Darlington Wwtp
Year	First date	Last date
1902	1902-05-20	1902-08-02
1903	1903-06-30	1903-08-02
1904	1904-06-04	1904-09-28
1911	1911-05-09	1911-09-14
1912	1912-05-23	1912-09-09
1913	1913-06-14	1913-09-07
1914	1914-05-25	1914-09-20
1915	1915-04-28	1915-09-13
1916	1916-05-25	1916-09-06
1917	1917-05-18	1917-08-26
1918	1918-05-03	1918-08-30
1919	1919-05-30	1919-09-09
1920	1920-06-08	1920-09-26
1921	1921-05-21	1921-08-29
1922	1922-05-10	1922-10-05
1923	1923-06-01	1923-09-05
1924	1924-05-05	1924-08-30
1925	1925-04-23	1925-09-20
1926	1926-07-07	1926-08-04
1927	1927-06-28	1927-09-18
1928	1928-05-09	1928-08-28
1929	1929-06-17	1929-09-04
1930	1930-04-10	1930-09-13
1931	1931-06-18	1931-09-21
1932	1932-05-14	1932-09-19
1933	1933-06-03	1933-09-23
1934	1934-05-05	1934-08-19
1935	1935-07-03	1935-08-19
1936	1936-05-06	1936-09-15
1938	1938-06-01	1938-08-25
1939	1939-05-19	1939-09-16
1940	1940-05-12	1940-08-16
1941	1941-05-21	1941-09-23
1942	1942-04-29	1942-09-12
1943	1943-06-13	1943-09-01
1944	1944-05-31	1944-08-16
1945	1945-06-23	1945-09-08
1946	1946-06-11	1946-08-17
1947	1947-06-10	1947-10-21
1948	1948-06-04	1948-09-19
1949	1949-05-03	1949-10-08
1950	1950-05-24	1950-10-17
1951	1951-05-01	1951-07-27
1952	1952-04-28	1952-09-28
1953	1953-05-29	1953-10-02
1954	1954-06-11	1954-09-29
1955	1955-05-23	1955-09-19
1956	1956-05-22	1956-09-03
1957	1957-06-16	1957-09-01
1958	1958-06-30	1958-08-30
1959	1959-05-02	1959-09-22
1960	1960-07-21	1960-09-08
1961	1961-05-13	1961-09-10
1962	1962-05-16	1962-10-10
1963	1963-05-08	1963-10-06
1964	1964-05-18	1964-09-09
1965	1965-06-22	1965-09-09
1967	1967-05-18	1967-08-02
1968	1968-06-05	1968-09-03
1969	1969-05-28	1969-10-04
1970	1970-04-29	1970-09-08
1971	1971-05-17	1971-10-01
1972	1972-05-18	1972-08-29
1973	1973-06-08	1973-09-02
1974	1974-05-21	1974-08-26
1975	1975-05-18	1975-10-13
1976	1976-06-06	1976-10-01
1977	1977-05-18	1977-08-31
1978	1978-05-25	1978-09-19
1979	1979-05-08	1979-09-02
1980	1980-04-22	1980-09-08
1981	1981-06-05	1981-09-11
1982	1982-07-04	1982-09-11
1983	1983-06-10	1983-09-10
1984	1984-06-17	1984-09-24
1985	1985-05-26	1985-09-19
1986	1986-04-25	1986-09-26
1987	1987-04-20	1987-08-16
1988	1988-05-28	1988-09-17
1989	1989-06-21	1989-08-22
1990	1990-06-12	1990-09-06
1991	1991-05-27	1991-09-09
1992	1992-06-11	1992-08-10
1993	1993-06-22	1993-08-26
1997	1997-06-20	1997-10-05
1998	1998-05-14	1998-09-26
1999	1999-06-05	1999-09-04
2001	2001-06-11	2001-08-09
2002	2002-04-15	2002-09-10
2011	2011-05-11	2011-09-03
2012	2012-05-16	2012-09-13
2013	2013-05-01	2013-09-20
2014	2014-05-21	2014-08-25
2015	2015-06-10	2015-09-07
2016	2016-05-07	2016-09-07
2018	2018-05-25	2018-10-04
2019	2019-06-27	2019-10-01
2020	2020-05-27	2020-08-29
2021	2021-05-02	2021-10-02
2022	2022-05-11	2022-09-21
2023	2023-05-31	2023-10-02
2024	2024-05-19	2024-09-22
2025	2025-05-16	2025-10-05
2026	2026-05-27	2026-09-05

Every Fixed Threshold

Fixed thresholds at Darlington Wwtp
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	104	65	1988	26
35 C (95 F): Days	57	26	1931	1
40 C (104 F): Days	3	4	1936	4
90 F (32.2 C): Days	100	49	1934	13
100 F (37.8 C): Days	13	16	1936	6
0 C (32 F): Ice days (max	104	80	1978	35
0 C (32 F): Frost days (min	100	185	1952	95
-10 C (14 F): Days with min	100	90	2014	35
-20 C (-4 F): Days with min	100	41	1977	14
-30 C (-22 F): Days with min	57	8	1936	1
-40 C (-40 F): Days with min	1	1	1951	1
20 C (68 F): Tropical nights (min	100	24	1949	13
25 C (77 F): Days with min	19	4	1916	1
10 mm (0.39 in): Days with 10 mm or more rain	103	46	2018	30
25 mm (0.98 in): Days with 25 mm or more rain	102	15	1913	9
50 mm (1.97 in): Days with 50 mm or more rain	76	5	1933	3
100 mm (3.94 in): Days with 100 mm or more rain	10	3	2002	2
10 cm (3.9 in): Days with 10 cm or more snowfall	86	6	1929	1
25 cm (9.8 in): Days with 25 cm or more snowfall	8	2	1912	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1902.

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Data for Darlington Wwtp 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Darlington Wwtp Threshold Days by Year

Key Facts for Darlington Wwtp Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

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