Saint Helena Threshold Days by Year

16 fixed thresholds counted per year at Saint Helena (USC00047643): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Saint Helena Thresholds

Saint Helena: days with a maximum temperature at or above 30 C (86 F) in 95 years, most in 1939 with 120.
Saint Helena: days with a maximum temperature at or above 35 C (95 F) in 95 years, most in 1996 with 51.
Saint Helena: days with a maximum temperature at or above 90 F (32.2 C) in 95 years, most in 1939 with 86.
Saint Helena: nights with a minimum temperature at or below 0 C (32 F) in 95 years, most in 1929 with 74.
16 fixed thresholds have at least one qualifying day at Saint Helena.

Days at or above 30 C (86 F)

95 years with a qualifying day

Days per year at Saint Helena with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 120 in 1939.

Days at or above 30 C (86 F) per year at Saint Helena
Year	Days	Decade average
1908	103	96.5
1909	90	96.5
1910	79	83.8
1911	73	83.8
1912	70	83.8
1913	97	83.8
1914	72	83.8
1915	95	83.8
1916	79	83.8
1917	83	83.8
1918	97	83.8
1919	93	83.8
1921	117	94.7
1922	113	94.7
1923	94	94.7
1924	103	94.7
1925	84	94.7
1926	115	94.7
1927	84	94.7
1928	66	94.7
1929	76	94.7
1930	54	90.8
1931	73	90.8
1932	93	90.8
1933	98	90.8
1934	98	90.8
1935	78	90.8
1936	111	90.8
1937	93	90.8
1938	90	90.8
1939	120	90.8
1940	89	87
1941	75	87
1942	88	87
1943	80	87
1944	80	87
1945	103	87
1946	90	87
1947	97	87
1948	69	87
1949	99	87
1950	98	80.3
1951	72	80.3
1952	95	80.3
1953	75	80.3
1954	62	80.3
1955	83	80.3
1956	70	80.3
1957	80	80.3
1958	88	80.3
1960	84	84.8
1961	83	84.8
1962	84	84.8
1963	68	84.8
1964	91	84.8
1965	73	84.8
1966	95	84.8
1967	101	84.8
1968	82	84.8
1969	87	84.8
1970	90	84.6
1971	85	84.6
1972	85	84.6
1973	86	84.6
1974	96	84.6
1975	63	84.6
1976	84	84.6
1977	82	84.6
1978	90	84.6
1982	58	74.3
1983	84	74.3
1989	81	74.3
1990	88	91
1991	90	91
1992	89	91
1993	86	91
1994	78	91
1995	87	91
1996	96	91
1997	114	91
2000	75	82.4
2001	88	82.4
2002	78	82.4
2003	90	82.4
2006	73	82.4
2007	74	82.4
2008	99	82.4
2010	50	86.9
2011	60	86.9
2013	86	86.9
2014	94	86.9
2015	100	86.9
2016	95	86.9
2017	109	86.9
2018	101	86.9

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

First to last qualifying date each year at Saint Helena
Year	First date	Last date
1908	1908-04-10	1908-10-26
1909	1909-04-08	1909-10-24
1910	1910-04-17	1910-10-28
1911	1911-03-29	1911-10-19
1912	1912-05-12	1912-10-17
1913	1913-04-23	1913-10-25
1914	1914-03-16	1914-11-08
1915	1915-05-26	1915-10-29
1916	1916-03-11	1916-09-29
1917	1917-06-12	1917-10-26
1918	1918-04-17	1918-10-30
1919	1919-05-13	1919-10-20
1921	1921-04-21	1921-11-08
1922	1922-05-01	1922-10-23
1923	1923-03-26	1923-10-21
1924	1924-04-06	1924-10-02
1925	1925-05-01	1925-10-27
1926	1926-03-24	1926-11-08
1927	1927-04-22	1927-10-22
1928	1928-05-12	1928-10-09
1929	1929-05-10	1929-11-03
1930	1930-02-15	1930-11-05
1931	1931-04-08	1931-10-01
1932	1932-03-30	1932-11-18
1933	1933-04-02	1933-11-13
1934	1934-03-10	1934-10-26
1935	1935-04-26	1935-10-27
1936	1936-04-10	1936-11-19
1937	1937-04-20	1937-10-22
1938	1938-04-18	1938-10-25
1939	1939-03-17	1939-10-30
1940	1940-04-12	1940-10-20
1941	1941-05-09	1941-10-16
1942	1942-05-19	1942-10-21
1943	1943-05-07	1943-10-14
1944	1944-05-02	1944-10-26
1945	1945-04-15	1945-11-03
1946	1946-04-22	1946-10-25
1947	1947-04-12	1947-10-04
1948	1948-06-07	1948-10-17
1949	1949-04-10	1949-11-04
1950	1950-04-17	1950-11-03
1951	1951-04-09	1951-10-13
1952	1952-04-17	1952-10-06
1953	1953-05-04	1953-10-08
1954	1954-04-16	1954-10-15
1955	1955-05-10	1955-11-10
1956	1956-05-15	1956-11-09
1957	1957-04-03	1957-09-23
1958	1958-04-20	1958-10-29
1960	1960-04-04	1960-11-01
1961	1961-04-03	1961-10-17
1962	1962-04-06	1962-11-01
1963	1963-05-16	1963-10-02
1964	1964-04-13	1964-10-22
1965	1965-04-25	1965-10-30
1966	1966-03-31	1966-11-02
1967	1967-05-07	1967-11-02
1968	1968-04-09	1968-10-27
1969	1969-05-05	1969-10-01
1970	1970-05-01	1970-10-10
1971	1971-06-06	1971-10-13
1972	1972-03-16	1972-10-06
1973	1973-04-24	1973-10-30
1974	1974-04-29	1974-10-18
1975	1975-05-12	1975-10-04
1976	1976-05-11	1976-11-04
1977	1977-04-12	1977-10-14
1978	1978-04-09	1978-10-23
1982	1982-04-21	1982-10-14
1983	1983-05-17	1983-10-27
1989	1989-04-05	1989-10-17
1990	1990-04-12	1990-10-24
1991	1991-05-21	1991-10-21
1992	1992-04-01	1992-10-12
1993	1993-05-01	1993-10-27
1994	1994-04-14	1994-10-10
1995	1995-04-24	1995-10-20
1996	1996-03-18	1996-10-09
1997	1997-04-16	1997-11-06
2000	2000-04-01	2000-10-02
2001	2001-05-04	2001-10-16
2002	2002-04-13	2002-10-09
2003	2003-05-20	2003-10-29
2006	2006-05-10	2006-10-21
2007	2007-04-27	2007-09-27
2008	2008-04-13	2008-11-14
2010	2010-06-12	2010-10-16
2011	2011-05-04	2011-10-22
2013	2013-04-10	2013-09-20
2014	2014-04-29	2014-10-13
2015	2015-03-26	2015-10-30
2016	2016-02-15	2016-10-20
2017	2017-04-01	2017-10-27
2018	2018-03-28	2018-11-03

Every Fixed Threshold

Fixed thresholds at Saint Helena
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	95	120	1939	101
35 C (95 F): Days	95	51	1996	33
40 C (104 F): Days	80	14	1919	2
45 C (113 F): Days	5	2	1972	1
90 F (32.2 C): Days	95	86	1939	65
100 F (37.8 C): Days	94	26	1919	7
110 F (43.3 C): Days	18	4	1921	2
0 C (32 F): Frost days (min	95	74	1929	9
-10 C (14 F): Days with min	1	1	1932	1
20 C (68 F): Tropical nights (min	20	5	2017	5
25 C (77 F): Days with min	1	1	1976	1
10 mm (0.39 in): Days with 10 mm or more rain	89	56	1983	6
25 mm (0.98 in): Days with 25 mm or more rain	87	28	1983	6
50 mm (1.97 in): Days with 50 mm or more rain	80	9	1940	3
100 mm (3.94 in): Days with 100 mm or more rain	27	2	1937	2
10 cm (3.9 in): Days with 10 cm or more snowfall	1	1	1976	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1908.

Download the Data

Data for Saint Helena 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Saint Helena Threshold Days by Year

Key Facts for Saint Helena Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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