Corton Threshold Days by Year (USC00461959)

14 fixed thresholds counted per year at Corton (USC00461959): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Corton Thresholds

Corton: days with 10 mm (0.39 in) or more of precipitation in 21 years, most in 1992 with 51.
Corton: days with 25 mm (0.98 in) or more of precipitation in 21 years, most in 1972 with 11.
Corton: days with a maximum temperature at or above 30 C (86 F) in 20 years, most in 1970 with 84.
Corton: days with a maximum temperature at or above 90 F (32.2 C) in 20 years, most in 1964 with 38.
14 fixed thresholds have at least one qualifying day at Corton.

Days at or above 30 C (86 F)

20 years with a qualifying day

Days per year at Corton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 84 in 1970.

Days at or above 30 C (86 F) per year at Corton
Year	Days	Decade average
1964	80	66.4
1965	73	66.4
1966	67	66.4
1967	44	66.4
1969	68	66.4
1970	84	45.4
1971	52	45.4
1972	33	45.4
1975	49	45.4
1976	18	45.4
1977	44	45.4
1979	38	45.4
1980	75	63.6
1982	47	63.6
1984	66	63.6
1985	59	63.6
1986	71	63.6
1990	50	54.7
1991	84	54.7
1992	30	54.7

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

First to last qualifying date each year at Corton
Year	First date	Last date
1964	1964-05-05	1964-09-27
1965	1965-05-01	1965-09-22
1966	1966-05-08	1966-09-03
1967	1967-05-27	1967-09-20
1969	1969-04-09	1969-10-13
1970	1970-04-29	1970-09-26
1971	1971-04-13	1971-09-29
1972	1972-05-24	1972-09-13
1975	1975-05-06	1975-09-05
1976	1976-04-17	1976-08-26
1977	1977-05-16	1977-09-03
1979	1979-05-07	1979-09-04
1980	1980-05-29	1980-09-18
1982	1982-05-06	1982-09-15
1984	1984-04-26	1984-09-22
1985	1985-04-18	1985-09-24
1986	1986-03-31	1986-10-03
1990	1990-04-25	1990-09-07
1991	1991-04-29	1991-09-18
1992	1992-05-22	1992-09-09

Every Fixed Threshold

Fixed thresholds at Corton
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	20	84	1970	30
35 C (95 F): Days	13	8	1966	4
90 F (32.2 C): Days	20	38	1964	4
0 C (32 F): Ice days (max	20	23	1979	4
0 C (32 F): Frost days (min	19	130	1969	82
-10 C (14 F): Days with min	19	26	1966	9
-20 C (-4 F): Days with min	9	3	1970	2
20 C (68 F): Tropical nights (min	19	37	1991	12
25 C (77 F): Days with min	4	2	1980	1
10 mm (0.39 in): Days with 10 mm or more rain	21	51	1992	51
25 mm (0.98 in): Days with 25 mm or more rain	21	11	1972	6
50 mm (1.97 in): Days with 50 mm or more rain	15	3	1967	1
10 cm (3.9 in): Days with 10 cm or more snowfall	5	4	1967	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1964	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1964.

Download the Data

Data for Corton 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).

Corton Threshold Days by Year (USC00461959)

Key Facts for Corton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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