Clayton Threshold Days by Year (USC00281708)

19 fixed thresholds counted per year at Clayton (USC00281708): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Clayton Thresholds

Clayton: days with a maximum temperature at or above 30 C (86 F) in 43 years, most in 1900 with 78.
Clayton: days with a maximum temperature at or above 90 F (32.2 C) in 43 years, most in 1900 with 51.
Clayton: days with a maximum temperature at or below 0 C (32 F) in 43 years, most in 1904 with 32.
Clayton: nights with a minimum temperature at or below 0 C (32 F) in 41 years, most in 1904 with 145.
19 fixed thresholds have at least one qualifying day at Clayton.

Days at or above 30 C (86 F)

43 years with a qualifying day

Days per year at Clayton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 78 in 1900.

Days at or above 30 C (86 F) per year at Clayton
Year	Days	Decade average
1897	34	49.7
1898	60	49.7
1899	55	49.7
1900	78	41.1
1901	52	41.1
1902	38	41.1
1903	18	41.1
1904	37	41.1
1906	36	41.1
1907	22	41.1
1908	45	41.1
1909	44	41.1
1910	36	44.1
1911	49	44.1
1912	35	44.1
1913	39	44.1
1915	51	44.1
1916	47	44.1
1917	49	44.1
1918	50	44.1
1919	41	44.1
1920	33	33
1939	62	62
1940	45	61
1941	77	61
1942	51	61
1943	78	61
1944	72	61
1947	58	61
1948	48	61
1949	59	61
1950	35	51.4
1951	49	51.4
1952	58	51.4
1953	59	51.4
1954	44	51.4
1955	56	51.4
1956	45	51.4
1957	71	51.4
1958	37	51.4
1959	60	51.4
1960	27	34
1961	41	34

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

First to last qualifying date each year at Clayton
Year	First date	Last date
1897	1897-06-04	1897-10-16
1898	1898-05-20	1898-09-19
1899	1899-05-02	1899-09-08
1900	1900-05-08	1900-10-06
1901	1901-06-06	1901-09-15
1902	1902-04-22	1902-09-08
1903	1903-04-30	1903-08-25
1904	1904-05-24	1904-10-11
1906	1906-05-17	1906-09-21
1907	1907-03-29	1907-09-21
1908	1908-04-26	1908-10-18
1909	1909-05-06	1909-08-29
1910	1910-05-24	1910-10-06
1911	1911-05-11	1911-08-28
1912	1912-05-21	1912-09-11
1913	1913-05-03	1913-09-05
1915	1915-04-20	1915-09-17
1916	1916-05-28	1916-10-09
1917	1917-05-19	1917-08-29
1918	1918-05-06	1918-09-16
1919	1919-05-05	1919-10-03
1920	1920-05-28	1920-09-25
1939	1939-05-07	1939-10-10
1940	1940-05-15	1940-09-21
1941	1941-04-14	1941-10-08
1942	1942-04-06	1942-09-17
1943	1943-05-07	1943-09-16
1944	1944-05-05	1944-10-08
1947	1947-05-13	1947-09-19
1948	1948-03-21	1948-09-18
1949	1949-05-04	1949-09-05
1950	1950-05-06	1950-09-01
1951	1951-05-16	1951-10-05
1952	1952-06-06	1952-09-14
1953	1953-04-25	1953-09-29
1954	1954-04-14	1954-09-07
1955	1955-05-05	1955-08-22
1956	1956-05-13	1956-09-23
1957	1957-04-21	1957-09-22
1958	1958-06-09	1958-09-26
1959	1959-04-09	1959-10-07
1960	1960-04-23	1960-09-01
1961	1961-06-11	1961-09-26

Every Fixed Threshold

Fixed thresholds at Clayton
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	43	78	1900	41
35 C (95 F): Days	35	20	1900	2
40 C (104 F): Days	3	2	1901	1
90 F (32.2 C): Days	43	51	1900	15
100 F (37.8 C): Days	15	5	1900	1
0 C (32 F): Ice days (max	43	32	1904	25
0 C (32 F): Frost days (min	41	145	1904	105
-10 C (14 F): Days with min	41	36	1904	17
-20 C (-4 F): Days with min	6	3	1899	2
20 C (68 F): Tropical nights (min	41	51	1959	42
25 C (77 F): Days with min	5	2	1952	1
10 mm (0.39 in): Days with 10 mm or more rain	40	55	1948	35
25 mm (0.98 in): Days with 25 mm or more rain	40	26	1958	12
50 mm (1.97 in): Days with 50 mm or more rain	35	6	1908	2
100 mm (3.94 in): Days with 100 mm or more rain	8	2	1901	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1940	1
10 cm (3.9 in): Days with 10 cm or more snowfall	18	5	1904	3
25 cm (9.8 in): Days with 25 cm or more snowfall	4	2	1958	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1902	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1897.

Download the Data

Data for Clayton 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).

Clayton Threshold Days by Year (USC00281708)

Key Facts for Clayton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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