St Charles Threshold Days by Year (USC00217277)

17 fixed thresholds counted per year at St Charles (USC00217277): 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 27 years, most in 1894 with 55.
St Charles: days with a maximum temperature at or below 0 C (32 F) in 27 years, most in 1893 with 105.
St Charles: nights with a minimum temperature at or below 0 C (32 F) in 27 years, most in 1917 with 181.
St Charles: nights with a minimum temperature at or below -10 C (14 F) in 27 years, most in 1893 with 100.
17 fixed thresholds have at least one qualifying day at St Charles.

Days at or above 30 C (86 F)

27 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 55 in 1894.

Days at or above 30 C (86 F) per year at St Charles
Year	Days	Decade average
1893	29	34.7
1894	55	34.7
1895	42	34.7
1896	26	34.7
1897	34	34.7
1898	30	34.7
1899	27	34.7
1900	37	26.3
1901	44	26.3
1904	7	26.3
1905	18	26.3
1906	29	26.3
1907	12	26.3
1908	34	26.3
1909	29	26.3
1910	47	26.6
1911	38	26.6
1912	24	26.6
1913	36	26.6
1914	27	26.6
1915	2	26.6
1916	29	26.6
1917	15	26.6
1918	21	26.6
1920	20	34
1921	54	34
1922	28	34

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
1893	1893-06-12	1893-09-18
1894	1894-05-12	1894-09-05
1895	1895-05-08	1895-09-21
1896	1896-05-07	1896-08-29
1897	1897-05-06	1897-10-14
1898	1898-06-03	1898-09-29
1899	1899-06-04	1899-09-04
1900	1900-05-12	1900-09-10
1901	1901-04-29	1901-09-05
1904	1904-07-16	1904-08-24
1905	1905-06-06	1905-10-05
1906	1906-06-17	1906-09-11
1907	1907-06-16	1907-08-31
1908	1908-05-17	1908-09-24
1909	1909-05-05	1909-08-28
1910	1910-04-29	1910-10-17
1911	1911-05-11	1911-08-16
1912	1912-06-25	1912-09-09
1913	1913-05-28	1913-09-07
1914	1914-05-26	1914-08-17
1915	1915-07-13	1915-07-15
1916	1916-06-30	1916-09-04
1917	1917-05-18	1917-08-26
1918	1918-05-03	1918-08-27
1920	1920-06-10	1920-09-21
1921	1921-05-22	1921-09-03
1922	1922-06-06	1922-10-05

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	27	55	1894	28
35 C (95 F): Days	21	12	1894	2
40 C (104 F): Days	2	1	1894	1
90 F (32.2 C): Days	26	32	1894	12
100 F (37.8 C): Days	4	4	1901	1
0 C (32 F): Ice days (max	27	105	1893	64
0 C (32 F): Frost days (min	27	181	1917	139
-10 C (14 F): Days with min	27	100	1893	63
-20 C (-4 F): Days with min	27	52	1893	27
-30 C (-22 F): Days with min	25	11	1899	2
-40 C (-40 F): Days with min	1	1	1912	1
20 C (68 F): Tropical nights (min	27	21	1921	13
25 C (77 F): Days with min	4	1	1896	1
10 mm (0.39 in): Days with 10 mm or more rain	23	34	1911	27
25 mm (0.98 in): Days with 25 mm or more rain	23	14	1900	7
50 mm (1.97 in): Days with 50 mm or more rain	16	3	1900	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1899	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

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 (USC00217277)

Key Facts for St Charles Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related