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Built 2026-10-19 (19 October 2026)

St Charles Co AP Threshold Days by Year (USW00053904)

15 fixed thresholds counted per year at St Charles Co AP (USW00053904): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for St Charles Co AP Thresholds

  • St Charles Co AP: days with a maximum temperature at or above 30 C (86 F) in 26 years, most in 2018 with 107.
  • St Charles Co AP: days with a maximum temperature at or above 35 C (95 F) in 26 years, most in 2012 with 38.
  • St Charles Co AP: days with a maximum temperature at or above 90 F (32.2 C) in 26 years, most in 2012 with 72.
  • St Charles Co AP: days with a maximum temperature at or below 0 C (32 F) in 26 years, most in 2010 with 34.
  • 15 fixed thresholds have at least one qualifying day at St Charles Co AP.
26 years with a qualifying day
Days at or above 30 C (86 F) per year at St Charles Co AP Days per year at St Charles Co AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 107 in 2018. 0501001501998: 581999: 632000: 732001: 662003: 562004: 532005: 842006: 752007: 992008: 512009: 402010: 912011: 862012: 962013: 652014: 642015: 622016: 822017: 862018: 1072020: 862021: 942022: 832023: 782024: 822025: 82199820012005200820112014201720212024
Days per year at St Charles Co AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 107 in 2018.
Days at or above 30 C (86 F) per year at St Charles Co AP
YearDaysDecade average
19985860.5
19996360.5
20007366.3
20016666.3
20035666.3
20045366.3
20058466.3
20067566.3
20079966.3
20085166.3
20094066.3
20109182.1
20118682.1
20129682.1
20136582.1
20146482.1
20156282.1
20168282.1
20178682.1
201810782.1
20208684.2
20219484.2
20228384.2
20237884.2
20248284.2
20258284.2
First to last qualifying date each year at St Charles Co AP For each year, a bar from the first to the last day at St Charles Co AP meeting 30 C (86 F). 1998: 12 May 1998 to 29 September 19981999: 4 June 1999 to 15 October 19992000: 19 April 2000 to 3 October 20002001: 7 April 2001 to 8 September 20012003: 14 April 2003 to 20 October 20032004: 16 April 2004 to 23 September 20042005: 8 May 2005 to 5 October 20052006: 13 April 2006 to 4 October 20062007: 29 April 2007 to 21 October 20072008: 30 May 2008 to 13 September 20082009: 24 April 2009 to 27 August 20092010: 1 April 2010 to 10 October 20102011: 3 April 2011 to 7 October 20112012: 14 March 2012 to 13 September 20122013: 30 April 2013 to 4 October 20132014: 6 May 2014 to 1 October 20142015: 6 May 2015 to 25 September 20152016: 25 April 2016 to 17 October 20162017: 19 April 2017 to 14 October 20172018: 12 April 2018 to 9 October 20182020: 7 April 2020 to 22 October 20202021: 1 May 2021 to 10 October 20212022: 23 April 2022 to 22 October 20222023: 4 April 2023 to 3 October 20232024: 27 February 2024 to 29 October 20242025: 28 April 2025 to 6 October 20251998200320072011201520202024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at St Charles Co AP meeting 30 C (86 F).
First to last qualifying date each year at St Charles Co AP
YearFirst dateLast date
19981998-05-121998-09-29
19991999-06-041999-10-15
20002000-04-192000-10-03
20012001-04-072001-09-08
20032003-04-142003-10-20
20042004-04-162004-09-23
20052005-05-082005-10-05
20062006-04-132006-10-04
20072007-04-292007-10-21
20082008-05-302008-09-13
20092009-04-242009-08-27
20102010-04-012010-10-10
20112011-04-032011-10-07
20122012-03-142012-09-13
20132013-04-302013-10-04
20142014-05-062014-10-01
20152015-05-062015-09-25
20162016-04-252016-10-17
20172017-04-192017-10-14
20182018-04-122018-10-09
20202020-04-072020-10-22
20212021-05-012021-10-10
20222022-04-232022-10-22
20232023-04-042023-10-03
20242024-02-272024-10-29
20252025-04-282025-10-06

Every Fixed Threshold

Fixed thresholds at St Charles Co AP
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days26107201882
35 C (95 F): Days2638201215
40 C (104 F): Days1720127
90 F (32.2 C): Days2672201244
100 F (37.8 C): Days151620122
0 C (32 F): Ice days (max2634201028
0 C (32 F): Frost days (min261272013106
-10 C (14 F): Days with min2631201429
-20 C (-4 F): Days with min9520141
20 C (68 F): Tropical nights (min2672201659
25 C (77 F): Days with min11420113
10 mm (0.39 in): Days with 10 mm or more rain2646201527
25 mm (0.98 in): Days with 25 mm or more rain2614200412
50 mm (1.97 in): Days with 50 mm or more rain21520155
100 mm (3.94 in): Days with 100 mm or more rain1120151

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1998.

Download the Data

  • Data for St Charles Co AP 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 . Last revised (2025-12-31).