Clayton 9 SSE Threshold Days by Year (USC00291881)

18 fixed thresholds counted per year at Clayton 9 SSE (USC00291881): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Clayton 9 SSE Thresholds

Clayton 9 SSE: nights with a minimum temperature at or below 0 C (32 F) in 33 years, most in 1956 with 165.
Clayton 9 SSE: nights with a minimum temperature at or below -10 C (14 F) in 33 years, most in 1955 with 44.
Clayton 9 SSE: days with a maximum temperature at or above 30 C (86 F) in 32 years, most in 1956 with 106.
Clayton 9 SSE: days with a maximum temperature at or above 35 C (95 F) in 32 years, most in 1934 with 48.
18 fixed thresholds have at least one qualifying day at Clayton 9 SSE.

Days at or above 30 C (86 F)

32 years with a qualifying day

Days per year at Clayton 9 SSE with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 106 in 1956.

Days at or above 30 C (86 F) per year at Clayton 9 SSE
Year	Days	Decade average
1927	67	68.7
1928	71	68.7
1929	68	68.7
1931	90	82.9
1932	68	82.9
1933	95	82.9
1934	99	82.9
1935	86	82.9
1936	69	82.9
1937	81	82.9
1938	68	82.9
1939	90	82.9
1940	79	72.6
1941	36	72.6
1942	62	72.6
1943	78	72.6
1944	66	72.6
1945	85	72.6
1946	69	72.6
1947	87	72.6
1948	103	72.6
1949	61	72.6
1950	60	87.6
1951	80	87.6
1952	94	87.6
1953	105	87.6
1954	105	87.6
1955	87	87.6
1956	106	87.6
1957	78	87.6
1958	83	87.6
1959	78	87.6

For each year, a bar from the first to the last day at Clayton 9 SSE meeting 30 C (86 F).

First to last qualifying date each year at Clayton 9 SSE
Year	First date	Last date
1927	1927-05-01	1927-09-18
1928	1928-01-14	1928-10-10
1929	1929-05-11	1929-09-28
1931	1931-05-16	1931-10-07
1932	1932-05-20	1932-09-20
1933	1933-05-19	1933-09-29
1934	1934-04-12	1934-10-16
1935	1935-04-14	1935-09-20
1936	1936-05-16	1936-09-07
1937	1937-05-14	1937-09-19
1938	1938-05-27	1938-09-26
1939	1939-05-19	1939-09-28
1940	1940-04-20	1940-09-17
1941	1941-05-13	1941-09-18
1942	1942-05-25	1942-09-17
1943	1943-04-24	1943-09-18
1944	1944-05-15	1944-09-22
1945	1945-05-06	1945-11-04
1946	1946-03-25	1946-09-06
1947	1947-04-21	1947-10-07
1948	1948-04-17	1948-10-03
1949	1949-05-03	1949-10-03
1950	1950-04-22	1950-10-29
1951	1951-05-05	1951-10-04
1952	1952-05-04	1952-10-03
1953	1953-04-27	1953-10-10
1954	1954-04-06	1954-10-13
1955	1955-05-06	1955-09-22
1956	1956-04-26	1956-10-05
1957	1957-06-06	1957-10-03
1958	1958-05-24	1958-10-19
1959	1959-05-01	1959-10-25

Every Fixed Threshold

Fixed thresholds at Clayton 9 SSE
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	32	106	1956	78
35 C (95 F): Days	32	48	1934	16
40 C (104 F): Days	4	4	1934	1
90 F (32.2 C): Days	32	78	1934	40
100 F (37.8 C): Days	19	21	1934	5
0 C (32 F): Ice days (max	32	29	1936	5
0 C (32 F): Frost days (min	33	165	1956	150
-10 C (14 F): Days with min	33	44	1955	29
-20 C (-4 F): Days with min	20	4	1933	3
-30 C (-22 F): Days with min	2	1	1951	1
20 C (68 F): Tropical nights (min	19	11	1943	1
25 C (77 F): Days with min	3	3	1943	2
10 mm (0.39 in): Days with 10 mm or more rain	32	22	1941	19
25 mm (0.98 in): Days with 25 mm or more rain	30	8	1941	1
50 mm (1.97 in): Days with 50 mm or more rain	15	3	1941	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1946	1
10 cm (3.9 in): Days with 10 cm or more snowfall	23	4	1940	3
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1943	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1927.

Download the Data

Data for Clayton 9 SSE 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 9 SSE Threshold Days by Year (USC00291881)

Key Facts for Clayton 9 SSE Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related