Clayton 1 SSW Threshold Days by Year (USC00091982)

16 fixed thresholds counted per year at Clayton 1 SSW (USC00091982): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Clayton 1 SSW Thresholds

Clayton 1 SSW: nights with a minimum temperature at or below 0 C (32 F) in 116 years, most in 1968 with 124.
Clayton 1 SSW: days with a maximum temperature at or above 30 C (86 F) in 115 years, most in 1925 with 100.
Clayton 1 SSW: days with 10 mm (0.39 in) or more of precipitation in 113 years, most in 1929 with 79.
Clayton 1 SSW: days with 25 mm (0.98 in) or more of precipitation in 113 years, most in 1979 with 42.
16 fixed thresholds have at least one qualifying day at Clayton 1 SSW.

Days at or above 30 C (86 F)

115 years with a qualifying day

Days per year at Clayton 1 SSW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 100 in 1925.

Days at or above 30 C (86 F) per year at Clayton 1 SSW
Year	Days	Decade average
1894	28	68.5
1895	71	68.5
1896	86	68.5
1897	73	68.5
1898	71	68.5
1899	82	68.5
1900	72	45.6
1901	44	45.6
1902	61	45.6
1903	38	45.6
1904	48	45.6
1905	40	45.6
1906	27	45.6
1907	41	45.6
1908	42	45.6
1909	43	45.6
1910	42	55.8
1911	72	55.8
1912	46	55.8
1913	56	55.8
1914	76	55.8
1915	52	55.8
1916	53	55.8
1917	49	55.8
1922	56	50
1923	60	50
1925	100	50
1926	54	50
1927	12	50
1928	39	50
1929	29	50
1930	51	50.4
1931	60	50.4
1932	38	50.4
1933	24	50.4
1934	55	50.4
1935	44	50.4
1936	68	50.4
1939	63	50.4
1940	43	58.6
1941	74	58.6
1943	75	58.6
1944	80	58.6
1945	65	58.6
1946	46	58.6
1947	55	58.6
1949	31	58.6
1950	22	51.3
1951	61	51.3
1952	62	51.3
1953	63	51.3
1954	83	51.3
1955	49	51.3
1956	45	51.3
1957	48	51.3
1958	38	51.3
1959	42	51.3
1961	37	47.2
1962	82	47.2
1963	51	47.2
1964	44	47.2
1965	37	47.2
1966	54	47.2
1967	29	47.2
1968	47	47.2
1969	44	47.2
1970	50	37.9
1971	25	37.9
1972	28	37.9
1973	32	37.9
1974	22	37.9
1975	36	37.9
1976	36	37.9
1977	54	37.9
1978	58	37.9
1979	38	37.9
1980	65	41.2
1981	31	41.2
1982	32	41.2
1983	57	41.2
1989	21	41.2
1990	52	43.1
1991	39	43.1
1992	21	43.1
1993	61	43.1
1994	8	43.1
1995	39	43.1
1996	35	43.1
1997	35	43.1
1998	86	43.1
1999	55	43.1
2000	50	41.6
2001	24	41.6
2002	55	41.6
2003	22	41.6
2004	23	41.6
2005	74	41.6
2007	53	41.6
2008	45	41.6
2009	28	41.6
2010	75	54.7
2011	86	54.7
2012	40	54.7
2014	21	54.7
2015	42	54.7
2016	75	54.7
2017	37	54.7
2018	40	54.7
2019	76	54.7
2020	45	50.3
2021	36	50.3
2022	55	50.3
2024	51	50.3
2025	50	50.3
2026	65	50.3

For each year, a bar from the first to the last day at Clayton 1 SSW meeting 30 C (86 F).

First to last qualifying date each year at Clayton 1 SSW
Year	First date	Last date
1894	1894-05-05	1894-08-17
1895	1895-05-31	1895-09-24
1896	1896-04-16	1896-09-19
1897	1897-05-23	1897-10-06
1898	1898-05-01	1898-09-05
1899	1899-05-02	1899-09-09
1900	1900-05-08	1900-10-08
1901	1901-05-01	1901-08-21
1902	1902-05-03	1902-09-02
1903	1903-05-21	1903-09-05
1904	1904-05-22	1904-10-01
1905	1905-05-10	1905-09-21
1906	1906-05-17	1906-09-05
1907	1907-03-20	1907-09-09
1908	1908-05-22	1908-09-13
1909	1909-05-29	1909-09-05
1910	1910-05-01	1910-09-21
1911	1911-05-10	1911-09-28
1912	1912-05-21	1912-09-08
1913	1913-05-30	1913-08-29
1914	1914-04-29	1914-09-21
1915	1915-04-26	1915-09-27
1916	1916-04-15	1916-09-08
1917	1917-04-19	1917-09-10
1922	1922-06-10	1922-10-05
1923	1923-06-21	1923-09-30
1925	1925-04-24	1925-09-24
1926	1926-05-25	1926-09-11
1927	1927-06-29	1927-08-08
1928	1928-06-20	1928-09-15
1929	1929-06-16	1929-08-31
1930	1930-06-20	1930-09-06
1931	1931-06-04	1931-09-26
1932	1932-06-22	1932-09-05
1933	1933-05-15	1933-09-28
1934	1934-06-01	1934-09-12
1935	1935-06-07	1935-09-23
1936	1936-05-09	1936-09-20
1939	1939-05-24	1939-10-09
1940	1940-05-06	1940-09-22
1941	1941-05-16	1941-10-08
1943	1943-04-28	1943-09-15
1944	1944-05-14	1944-09-21
1945	1945-04-14	1945-09-26
1946	1946-04-03	1946-08-23
1947	1947-05-15	1947-09-15
1949	1949-05-06	1949-09-18
1950	1950-05-04	1950-09-04
1951	1951-05-22	1951-10-06
1952	1952-05-05	1952-09-01
1953	1953-05-23	1953-09-28
1954	1954-06-08	1954-10-06
1955	1955-04-16	1955-09-23
1956	1956-05-12	1956-09-16
1957	1957-04-28	1957-09-07
1958	1958-05-23	1958-09-26
1959	1959-05-03	1959-09-04
1961	1961-06-01	1961-09-25
1962	1962-04-30	1962-09-14
1963	1963-04-21	1963-09-20
1964	1964-05-18	1964-09-09
1965	1965-04-23	1965-09-20
1966	1966-05-09	1966-09-06
1967	1967-03-14	1967-08-20
1968	1968-05-24	1968-08-26
1969	1969-05-30	1969-08-26
1970	1970-04-23	1970-09-21
1971	1971-06-05	1971-09-30
1972	1972-06-05	1972-09-21
1973	1973-06-17	1973-09-09
1974	1974-05-18	1974-09-13
1975	1975-05-21	1975-09-09
1976	1976-04-17	1976-08-26
1977	1977-05-04	1977-09-06
1978	1978-06-06	1978-09-22
1979	1979-06-03	1979-09-08
1980	1980-04-23	1980-09-24
1981	1981-07-08	1981-09-14
1982	1982-05-13	1982-09-18
1983	1983-06-25	1983-09-12
1989	1989-05-31	1989-08-30
1990	1990-05-01	1990-09-10
1991	1991-05-29	1991-09-17
1992	1992-06-25	1992-08-12
1993	1993-06-07	1993-09-02
1994	1994-06-02	1994-09-01
1995	1995-04-10	1995-09-01
1996	1996-05-19	1996-09-07
1997	1997-06-26	1997-09-21
1998	1998-05-15	1998-09-28
1999	1999-06-08	1999-09-09
2000	2000-05-13	2000-09-14
2001	2001-04-11	2001-08-30
2002	2002-04-19	2002-09-12
2003	2003-06-25	2003-08-30
2004	2004-05-08	2004-09-19
2005	2005-06-05	2005-09-26
2007	2007-05-01	2007-09-24
2008	2008-06-05	2008-09-09
2009	2009-04-25	2009-08-12
2010	2010-04-06	2010-09-24
2011	2011-04-11	2011-09-15
2012	2012-05-27	2012-09-08
2014	2014-05-06	2014-09-04
2015	2015-06-14	2015-09-05
2016	2016-06-02	2016-10-20
2017	2017-05-12	2017-08-24
2018	2018-05-14	2018-10-06
2019	2019-05-19	2019-10-05
2020	2020-03-28	2020-09-05
2021	2021-05-24	2021-08-29
2022	2022-05-06	2022-09-23
2024	2024-04-16	2024-09-24
2025	2025-06-07	2025-08-21
2026	2026-04-18	2026-09-22

Every Fixed Threshold

Fixed thresholds at Clayton 1 SSW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	115	100	1925	65
35 C (95 F): Days	47	22	1925	3
90 F (32.2 C): Days	109	70	1925	30
100 F (37.8 C): Days	2	2	1952	2
0 C (32 F): Ice days (max	77	9	1917	3
0 C (32 F): Frost days (min	116	124	1968	40
-10 C (14 F): Days with min	104	27	1977	3
-20 C (-4 F): Days with min	9	1	1895	1
20 C (68 F): Tropical nights (min	100	33	2024	38
10 mm (0.39 in): Days with 10 mm or more rain	113	79	1929	35
25 mm (0.98 in): Days with 25 mm or more rain	113	42	1979	14
50 mm (1.97 in): Days with 50 mm or more rain	113	14	1997	4
100 mm (3.94 in): Days with 100 mm or more rain	46	3	1896	1
200 mm (7.87 in): Days with 200 mm or more rain	2	2	2004	2
10 cm (3.9 in): Days with 10 cm or more snowfall	29	3	1930	1
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1930	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

Data for Clayton 1 SSW 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Clayton 1 SSW Threshold Days by Year (USC00091982)

Key Facts for Clayton 1 SSW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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