Canton 1 SW Threshold Days by Year (USC00311441)

15 fixed thresholds counted per year at Canton 1 SW (USC00311441): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Canton 1 SW Thresholds

Canton 1 SW: nights with a minimum temperature at or below 0 C (32 F) in 62 years, most in 1969 with 139.
Canton 1 SW: nights with a minimum temperature at or below -10 C (14 F) in 62 years, most in 1977 with 35.
Canton 1 SW: days with 10 mm (0.39 in) or more of precipitation in 62 years, most in 1989 with 52.
Canton 1 SW: days with 25 mm (0.98 in) or more of precipitation in 62 years, most in 1989 with 17.
15 fixed thresholds have at least one qualifying day at Canton 1 SW.

Days at or above 30 C (86 F)

60 years with a qualifying day

Days per year at Canton 1 SW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 90 in 1934.

Days at or above 30 C (86 F) per year at Canton 1 SW
Year	Days	Decade average
1931	83	54.9
1932	72	54.9
1933	65	54.9
1934	90	54.9
1935	42	54.9
1936	54	54.9
1937	29	54.9
1938	24	54.9
1939	35	54.9
1940	20	34
1941	37	34
1942	43	34
1943	53	34
1944	35	34
1945	33	34
1946	28	34
1947	24	34
1948	33	34
1949	34	34
1950	18	32.9
1951	38	32.9
1952	43	32.9
1953	54	32.9
1954	51	32.9
1955	30	32.9
1956	31	32.9
1957	35	32.9
1958	11	32.9
1959	18	32.9
1960	17	17.6
1961	8	17.6
1962	24	17.6
1963	10	17.6
1964	22	17.6
1965	15	17.6
1966	17	17.6
1968	24	17.6
1969	21	17.6
1970	20	20.1
1971	12	20.1
1972	9	20.1
1973	18	20.1
1974	7	20.1
1975	23	20.1
1976	18	20.1
1977	38	20.1
1978	37	20.1
1979	19	20.1
1980	52	25.2
1981	26	25.2
1982	9	25.2
1983	27	25.2
1984	11	25.2
1985	23	25.2
1986	34	25.2
1987	26	25.2
1988	29	25.2
1989	15	25.2
1990	16	13
1992	10	13

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

First to last qualifying date each year at Canton 1 SW
Year	First date	Last date
1931	1931-05-15	1931-09-23
1932	1932-05-06	1932-09-05
1933	1933-05-11	1933-09-11
1934	1934-05-05	1934-09-26
1935	1935-06-12	1935-08-17
1936	1936-05-17	1936-08-27
1937	1937-05-18	1937-09-04
1938	1938-05-21	1938-08-24
1939	1939-05-23	1939-09-09
1940	1940-05-07	1940-07-31
1941	1941-05-16	1941-09-09
1942	1942-05-29	1942-09-18
1943	1943-05-06	1943-09-06
1944	1944-05-15	1944-08-31
1945	1945-05-29	1945-08-30
1946	1946-06-07	1946-08-19
1947	1947-05-16	1947-09-08
1948	1948-05-23	1948-08-29
1949	1949-06-13	1949-08-12
1950	1950-05-04	1950-08-11
1951	1951-06-01	1951-10-06
1952	1952-06-07	1952-08-19
1953	1953-05-23	1953-09-18
1954	1954-06-07	1954-10-05
1955	1955-04-18	1955-09-22
1956	1956-05-13	1956-09-16
1957	1957-04-25	1957-09-06
1958	1958-06-10	1958-08-01
1959	1959-06-21	1959-09-03
1960	1960-05-17	1960-09-06
1961	1961-07-20	1961-09-02
1962	1962-04-30	1962-09-14
1963	1963-04-21	1963-08-24
1964	1964-05-08	1964-08-22
1965	1965-07-09	1965-09-15
1966	1966-06-25	1966-08-18
1968	1968-06-29	1968-08-24
1969	1969-06-01	1969-07-19
1970	1970-05-21	1970-09-19
1971	1971-06-03	1971-09-15
1972	1972-07-19	1972-09-09
1973	1973-07-03	1973-09-07
1974	1974-07-02	1974-09-12
1975	1975-05-21	1975-09-05
1976	1976-05-31	1976-08-23
1977	1977-05-06	1977-09-05
1978	1978-06-25	1978-09-21
1979	1979-06-18	1979-08-29
1980	1980-05-12	1980-09-23
1981	1981-06-09	1981-08-14
1982	1982-05-30	1982-08-06
1983	1983-06-25	1983-09-10
1984	1984-04-26	1984-09-14
1985	1985-06-01	1985-09-05
1986	1986-04-27	1986-08-16
1987	1987-07-06	1987-08-27
1988	1988-04-22	1988-08-26
1989	1989-05-25	1989-08-22
1990	1990-06-07	1990-09-07
1992	1992-07-09	1992-08-12

Every Fixed Threshold

Fixed thresholds at Canton 1 SW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	60	90	1934	10
35 C (95 F): Days	17	13	1934	1
90 F (32.2 C): Days	50	50	1931	3
100 F (37.8 C): Days	2	1	1931	1
0 C (32 F): Ice days (max	60	23	1940	4
0 C (32 F): Frost days (min	62	139	1969	111
-10 C (14 F): Days with min	62	35	1977	6
-20 C (-4 F): Days with min	12	3	1940	1
20 C (68 F): Tropical nights (min	13	23	1931	1
10 mm (0.39 in): Days with 10 mm or more rain	62	52	1989	40
25 mm (0.98 in): Days with 25 mm or more rain	62	17	1989	11
50 mm (1.97 in): Days with 50 mm or more rain	40	4	1940	2
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1949	1
10 cm (3.9 in): Days with 10 cm or more snowfall	24	3	1931	1
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1936	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1931.

Download the Data

Data for Canton 1 SW 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).

Canton 1 SW Threshold Days by Year (USC00311441)

Key Facts for Canton 1 SW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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