Saint Charles Threshold Days by Year (USC00036376)

18 fixed thresholds counted per year at Saint Charles (USC00036376): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Saint Charles Thresholds

Saint Charles: days with a maximum temperature at or above 30 C (86 F) in 71 years, most in 1953 with 133.
Saint Charles: days with a maximum temperature at or above 35 C (95 F) in 71 years, most in 1954 with 86.
Saint Charles: days with a maximum temperature at or above 90 F (32.2 C) in 71 years, most in 1954 with 116.
Saint Charles: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 1961 with 54.
18 fixed thresholds have at least one qualifying day at Saint Charles.

Days at or above 30 C (86 F)

71 years with a qualifying day

Days per year at Saint Charles with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 133 in 1953.

Days at or above 30 C (86 F) per year at Saint Charles
Year	Days	Decade average
1937	121	128.3
1938	132	128.3
1939	132	128.3
1940	90	111.6
1941	132	111.6
1942	111	111.6
1943	117	111.6
1944	127	111.6
1945	119	111.6
1946	107	111.6
1947	106	111.6
1948	97	111.6
1949	110	111.6
1950	92	117.7
1951	119	117.7
1952	125	117.7
1953	133	117.7
1954	132	117.7
1955	126	117.7
1956	123	117.7
1957	105	117.7
1958	105	117.7
1959	117	117.7
1960	114	106.6
1961	89	106.6
1962	116	106.6
1963	124	106.6
1964	108	106.6
1965	113	106.6
1966	88	106.6
1967	102	106.6
1968	109	106.6
1969	103	106.6
1970	106	102.8
1971	109	102.8
1972	119	102.8
1973	97	102.8
1974	78	102.8
1975	100	102.8
1976	88	102.8
1977	125	102.8
1980	117	107.5
1981	104	107.5
1982	101	107.5
1983	103	107.5
1984	99	107.5
1985	98	107.5
1986	119	107.5
1987	119	107.5
1990	99	104.5
1999	110	104.5
2000	122	104.6
2001	107	104.6
2002	114	104.6
2003	108	104.6
2007	112	104.6
2008	91	104.6
2009	78	104.6
2010	132	101.9
2011	92	101.9
2012	96	101.9
2013	86	101.9
2014	89	101.9
2015	106	101.9
2016	111	101.9
2017	88	101.9
2019	117	101.9
2020	95	83.3
2021	104	83.3
2024	94	83.3
2026	40	83.3

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

First to last qualifying date each year at Saint Charles
Year	First date	Last date
1937	1937-04-19	1937-11-01
1938	1938-04-30	1938-10-16
1939	1939-04-26	1939-10-26
1940	1940-04-01	1940-10-13
1941	1941-04-12	1941-10-23
1942	1942-04-23	1942-10-17
1943	1943-04-10	1943-09-15
1944	1944-05-11	1944-10-25
1945	1945-04-04	1945-10-02
1946	1946-04-01	1946-10-08
1947	1947-05-04	1947-10-23
1948	1948-04-13	1948-09-22
1949	1949-04-25	1949-10-10
1950	1950-05-09	1950-11-01
1951	1951-05-02	1951-10-19
1952	1952-04-30	1952-10-02
1953	1953-04-09	1953-10-23
1954	1954-04-08	1954-10-12
1955	1955-04-19	1955-11-15
1956	1956-04-29	1956-10-12
1957	1957-05-12	1957-09-22
1958	1958-05-14	1958-09-27
1959	1959-05-01	1959-10-11
1960	1960-04-07	1960-10-07
1961	1961-05-22	1961-10-14
1962	1962-05-08	1962-10-15
1963	1963-04-01	1963-10-24
1964	1964-05-17	1964-09-27
1965	1965-04-10	1965-09-22
1966	1966-05-23	1966-10-10
1967	1967-03-12	1967-10-16
1968	1968-05-15	1968-10-16
1969	1969-05-05	1969-10-13
1970	1970-05-01	1970-10-04
1971	1971-04-20	1971-10-30
1972	1972-04-14	1972-10-19
1973	1973-05-11	1973-10-13
1974	1974-04-04	1974-09-21
1975	1975-04-28	1975-10-16
1976	1976-04-24	1976-10-05
1977	1977-04-14	1977-10-02
1980	1980-04-22	1980-10-11
1981	1981-04-27	1981-10-06
1982	1982-05-05	1982-10-10
1983	1983-05-29	1983-10-09
1984	1984-05-14	1984-11-01
1985	1985-04-30	1985-10-11
1986	1986-04-08	1986-10-06
1987	1987-04-20	1987-09-29
1990	1990-04-30	1990-10-03
1999	1999-04-10	1999-10-17
2000	2000-05-12	2000-11-02
2001	2001-04-10	2001-10-03
2002	2002-04-16	2002-10-07
2003	2003-04-14	2003-10-25
2007	2007-03-25	2007-10-19
2008	2008-05-20	2008-10-01
2009	2009-04-23	2009-09-28
2010	2010-05-05	2010-10-11
2011	2011-04-09	2011-10-18
2012	2012-05-02	2012-09-28
2013	2013-04-17	2013-09-27
2014	2014-04-27	2014-10-27
2015	2015-05-05	2015-10-16
2016	2016-05-11	2016-11-01
2017	2017-03-22	2017-10-15
2019	2019-05-08	2019-10-11
2020	2020-05-23	2020-10-22
2021	2021-05-04	2021-10-16
2024	2024-05-01	2024-10-26
2026	2026-03-07	2026-10-02

Every Fixed Threshold

Fixed thresholds at Saint Charles
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	71	133	1953	40
35 C (95 F): Days	71	86	1954	4
40 C (104 F): Days	12	11	1980	3
90 F (32.2 C): Days	71	116	1954	17
100 F (37.8 C): Days	44	41	1980	1
0 C (32 F): Ice days (max	63	12	1977	4
0 C (32 F): Frost days (min	61	90	1960	27
-10 C (14 F): Days with min	46	20	1963	4
-20 C (-4 F): Days with min	2	1	1951	1
20 C (68 F): Tropical nights (min	61	121	2019	53
25 C (77 F): Days with min	42	15	2010	5
10 mm (0.39 in): Days with 10 mm or more rain	68	54	1961	13
25 mm (0.98 in): Days with 25 mm or more rain	68	28	2024	6
50 mm (1.97 in): Days with 50 mm or more rain	68	12	1957	1
100 mm (3.94 in): Days with 100 mm or more rain	23	2	2001	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1973	1
10 cm (3.9 in): Days with 10 cm or more snowfall	9	1	1949	1
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1963	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1937.

Download the Data

Data for Saint Charles 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).

Saint Charles Threshold Days by Year (USC00036376)

Key Facts for Saint Charles Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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