St Charles Threshold Days by Year (USC00137340)

18 fixed thresholds counted per year at St Charles (USC00137340): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for St Charles Thresholds

St Charles: days with a maximum temperature at or above 30 C (86 F) in 18 years, most in 1911 with 85.
St Charles: days with a maximum temperature at or above 90 F (32.2 C) in 18 years, most in 1911 with 55.
St Charles: days with a maximum temperature at or below 0 C (32 F) in 18 years, most in 1904 with 56.
St Charles: nights with a minimum temperature at or below 0 C (32 F) in 18 years, most in 1907 with 149.
18 fixed thresholds have at least one qualifying day at St Charles.

Days at or above 30 C (86 F)

18 years with a qualifying day

Days per year at St Charles with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 85 in 1911.

Days at or above 30 C (86 F) per year at St Charles
Year	Days	Decade average
1901	75	39.4
1902	28	39.4
1903	23	39.4
1904	20	39.4
1905	33	39.4
1906	43	39.4
1907	36	39.4
1908	49	39.4
1909	48	39.4
1910	62	55.3
1911	85	55.3
1912	49	55.3
1913	68	55.3
1914	73	55.3
1915	11	55.3
1916	64	55.3
1917	29	55.3
1918	57	55.3

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

First to last qualifying date each year at St Charles
Year	First date	Last date
1901	1901-04-29	1901-09-24
1902	1902-04-21	1902-08-13
1903	1903-05-20	1903-08-26
1904	1904-06-20	1904-10-04
1905	1905-04-09	1905-09-29
1906	1906-04-24	1906-09-16
1907	1907-03-21	1907-09-18
1908	1908-04-13	1908-09-25
1909	1909-05-05	1909-10-07
1910	1910-03-23	1910-10-16
1911	1911-05-09	1911-09-23
1912	1912-05-23	1912-10-28
1913	1913-05-28	1913-09-07
1914	1914-04-26	1914-09-19
1915	1915-04-28	1915-09-13
1916	1916-04-12	1916-10-07
1917	1917-05-18	1917-09-05
1918	1918-05-03	1918-10-15

Every Fixed Threshold

Fixed thresholds at St Charles
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	18	85	1911	57
35 C (95 F): Days	14	31	1911	13
40 C (104 F): Days	3	5	1911	2
90 F (32.2 C): Days	18	55	1911	34
100 F (37.8 C): Days	7	17	1901	5
110 F (43.3 C): Days	1	1	1918	1
0 C (32 F): Ice days (max	18	56	1904	43
0 C (32 F): Frost days (min	18	149	1907	117
-10 C (14 F): Days with min	18	61	1912	41
-20 C (-4 F): Days with min	18	19	1905	12
-30 C (-22 F): Days with min	3	3	1905	2
20 C (68 F): Tropical nights (min	18	43	1913	29
25 C (77 F): Days with min	8	5	1911	2
10 mm (0.39 in): Days with 10 mm or more rain	17	38	1902	21
25 mm (0.98 in): Days with 25 mm or more rain	17	15	1902	5
50 mm (1.97 in): Days with 50 mm or more rain	13	5	1915	1
100 mm (3.94 in): Days with 100 mm or more rain	3	2	1914	2
10 cm (3.9 in): Days with 10 cm or more snowfall	3	2	1915	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1901.

Download the Data

Data for St 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

St Charles Threshold Days by Year (USC00137340)

Key Facts for St Charles Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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