S Haven Threshold Days by Year (USC00207690)

17 fixed thresholds counted per year at S Haven (USC00207690): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for S Haven Thresholds

S Haven: nights with a minimum temperature at or below 0 C (32 F) in 102 years, most in 1907 with 177.
S Haven: nights with a minimum temperature at or below -10 C (14 F) in 102 years, most in 1978 with 56.
S Haven: nights with a minimum temperature at or above 20 C (68 F) in 100 years, most in 1995 with 47.
S Haven: days with a maximum temperature at or below 0 C (32 F) in 99 years, most in 1912 with 74.
17 fixed thresholds have at least one qualifying day at S Haven.

Days at or above 30 C (86 F)

97 years with a qualifying day

Days per year at S Haven with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 53 in 1921.

Days at or above 30 C (86 F) per year at S Haven
Year	Days	Decade average
1896	16	13
1899	10	13
1900	14	7.6
1901	17	7.6
1903	4	7.6
1905	4	7.6
1906	7	7.6
1908	5	7.6
1909	2	7.6
1912	3	11.3
1916	24	11.3
1917	7	11.3
1920	24	22.1
1921	53	22.1
1922	23	22.1
1923	36	22.1
1924	10	22.1
1925	27	22.1
1926	11	22.1
1927	9	22.1
1928	15	22.1
1929	13	22.1
1930	23	24.1
1931	32	24.1
1932	18	24.1
1933	34	24.1
1934	33	24.1
1935	13	24.1
1936	23	24.1
1937	33	24.1
1938	8	24.1
1939	24	24.1
1940	28	24
1941	28	24
1942	23	24
1943	17	24
1944	33	24
1945	16	24
1946	15	24
1947	30	24
1948	18	24
1949	32	24
1950	8	20.3
1951	12	20.3
1952	25	20.3
1953	29	20.3
1954	18	20.3
1955	44	20.3
1956	14	20.3
1957	8	20.3
1959	25	20.3
1960	13	10.6
1961	12	10.6
1962	11	10.6
1963	7	10.6
1964	17	10.6
1965	6	10.6
1966	10	10.6
1967	2	10.6
1968	16	10.6
1969	12	10.6
1970	20	11.9
1971	16	11.9
1972	9	11.9
1973	14	11.9
1974	12	11.9
1975	8	11.9
1976	6	11.9
1977	22	11.9
1978	9	11.9
1979	3	11.9
1980	15	10.2
1981	1	10.2
1982	10	10.2
1983	23	10.2
1984	8	10.2
1985	7	10.2
1986	8	10.2
1987	3	10.2
1988	25	10.2
1989	2	10.2
1990	3	9.9
1991	22	9.9
1992	5	9.9
1993	9	9.9
1994	13	9.9
1995	18	9.9
1996	5	9.9
1997	4	9.9
1998	10	9.9
2002	27	15.2
2003	13	15.2
2004	9	15.2
2005	25	15.2
2006	12	15.2
2009	5	15.2
2010	27	27

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

First to last qualifying date each year at S Haven
Year	First date	Last date
1896	1896-06-06	1896-09-10
1899	1899-06-07	1899-09-05
1900	1900-06-08	1900-09-11
1901	1901-06-24	1901-10-31
1903	1903-08-23	1903-10-04
1905	1905-05-04	1905-09-29
1906	1906-06-06	1906-09-08
1908	1908-06-18	1908-09-24
1909	1909-06-29	1909-07-11
1912	1912-07-05	1912-09-10
1916	1916-05-26	1916-09-12
1917	1917-07-24	1917-08-01
1920	1920-05-26	1920-09-27
1921	1921-05-20	1921-09-02
1922	1922-05-10	1922-09-09
1923	1923-05-28	1923-09-08
1924	1924-06-19	1924-09-21
1925	1925-05-22	1925-09-19
1926	1926-07-04	1926-08-28
1927	1927-06-29	1927-09-14
1928	1928-07-06	1928-09-14
1929	1929-05-29	1929-09-09
1930	1930-05-10	1930-09-23
1931	1931-06-11	1931-09-17
1932	1932-06-17	1932-09-12
1933	1933-06-06	1933-09-25
1934	1934-05-21	1934-08-18
1935	1935-06-30	1935-09-19
1936	1936-07-06	1936-08-25
1937	1937-05-30	1937-09-23
1938	1938-07-06	1938-08-20
1939	1939-05-25	1939-09-16
1940	1940-06-06	1940-08-18
1941	1941-06-20	1941-09-24
1942	1942-05-01	1942-08-31
1943	1943-06-14	1943-09-01
1944	1944-05-30	1944-09-04
1945	1945-06-27	1945-09-08
1946	1946-06-28	1946-09-17
1947	1947-06-10	1947-09-18
1948	1948-06-22	1948-09-05
1949	1949-06-01	1949-08-26
1950	1950-05-24	1950-09-09
1951	1951-05-01	1951-10-04
1952	1952-06-07	1952-09-13
1953	1953-06-19	1953-09-30
1954	1954-05-31	1954-09-07
1955	1955-06-04	1955-09-16
1956	1956-05-13	1956-08-31
1957	1957-06-16	1957-07-21
1959	1959-05-05	1959-09-10
1960	1960-07-24	1960-09-09
1961	1961-06-12	1961-09-22
1962	1962-05-17	1962-08-25
1963	1963-06-09	1963-07-24
1964	1964-06-08	1964-09-10
1965	1965-06-05	1965-08-06
1966	1966-06-25	1966-07-26
1967	1967-06-14	1967-06-15
1968	1968-06-07	1968-08-24
1969	1969-06-11	1969-08-31
1970	1970-06-11	1970-09-22
1971	1971-06-05	1971-09-28
1972	1972-06-19	1972-08-22
1973	1973-06-11	1973-09-04
1974	1974-06-06	1974-08-30
1975	1975-05-20	1975-08-28
1976	1976-06-12	1976-08-28
1977	1977-05-16	1977-08-31
1978	1978-06-12	1978-09-20
1979	1979-05-08	1979-08-10
1980	1980-06-23	1980-08-29
1981	1981-07-08	1981-07-08
1982	1982-05-14	1982-09-13
1983	1983-06-14	1983-08-24
1984	1984-06-07	1984-08-28
1985	1985-06-09	1985-08-12
1986	1986-04-25	1986-07-25
1987	1987-05-30	1987-08-15
1988	1988-06-15	1988-08-18
1989	1989-06-23	1989-07-11
1990	1990-07-03	1990-07-30
1991	1991-05-29	1991-09-10
1992	1992-05-17	1992-07-03
1993	1993-05-09	1993-08-31
1994	1994-06-06	1994-07-20
1995	1995-06-21	1995-08-16
1996	1996-08-05	1996-08-19
1997	1997-06-22	1997-07-14
1998	1998-05-15	1998-08-23
2002	2002-04-18	2002-09-09
2003	2003-06-24	2003-09-09
2004	2004-06-08	2004-09-15
2005	2005-06-02	2005-09-14
2006	2006-05-29	2006-08-03
2009	2009-06-22	2009-09-10
2010	2010-05-23	2010-09-01

Every Fixed Threshold

Fixed thresholds at S Haven
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	97	53	1921	27
35 C (95 F): Days	20	8	1934	1
90 F (32.2 C): Days	74	23	1921	7
100 F (37.8 C): Days	1	1	1953	1
0 C (32 F): Ice days (max	99	74	1912	50
0 C (32 F): Frost days (min	102	177	1907	106
-10 C (14 F): Days with min	102	56	1978	8
-20 C (-4 F): Days with min	47	7	1906	1
-30 C (-22 F): Days with min	1	1	1899	1
20 C (68 F): Tropical nights (min	100	47	1995	44
25 C (77 F): Days with min	28	8	1988	1
10 mm (0.39 in): Days with 10 mm or more rain	87	60	1912	37
25 mm (0.98 in): Days with 25 mm or more rain	87	21	2009	21
50 mm (1.97 in): Days with 50 mm or more rain	44	5	1912	5
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1937	1
10 cm (3.9 in): Days with 10 cm or more snowfall	70	12	1994	9
25 cm (9.8 in): Days with 25 cm or more snowfall	11	2	1994	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

Data for S Haven 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).

S Haven Threshold Days by Year (USC00207690)

Key Facts for S Haven Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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