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Built 2026-10-19 (19 October 2026)

Cahokia St Louis Dwtn AP Threshold Days by Year (USW00003960)

16 fixed thresholds counted per year at Cahokia St Louis Dwtn AP (USW00003960): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Cahokia St Louis Dwtn AP Thresholds

  • Cahokia St Louis Dwtn AP: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 2018 with 105.
  • Cahokia St Louis Dwtn AP: days with a maximum temperature at or above 35 C (95 F) in 28 years, most in 2012 with 39.
  • Cahokia St Louis Dwtn AP: days with a maximum temperature at or above 90 F (32.2 C) in 28 years, most in 2012 with 75.
  • Cahokia St Louis Dwtn AP: days with a maximum temperature at or below 0 C (32 F) in 28 years, most in 2010 with 33.
  • 16 fixed thresholds have at least one qualifying day at Cahokia St Louis Dwtn AP.
28 years with a qualifying day
Days at or above 30 C (86 F) per year at Cahokia St Louis Dwtn AP Days per year at Cahokia St Louis Dwtn AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 105 in 2018. 0501001501998: 831999: 662000: 682001: 822002: 962003: 702004: 562005: 862006: 822007: 962008: 592009: 512010: 912011: 832012: 952013: 662014: 812015: 812016: 952017: 1002018: 1052019: 822020: 782021: 902022: 832023: 882024: 902025: 851998200120042007201020132016201920222025
Days per year at Cahokia St Louis Dwtn AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 105 in 2018.
Days at or above 30 C (86 F) per year at Cahokia St Louis Dwtn AP
YearDaysDecade average
19988374.5
19996674.5
20006874.6
20018274.6
20029674.6
20037074.6
20045674.6
20058674.6
20068274.6
20079674.6
20085974.6
20095174.6
20109187.9
20118387.9
20129587.9
20136687.9
20148187.9
20158187.9
20169587.9
201710087.9
201810587.9
20198287.9
20207885.7
20219085.7
20228385.7
20238885.7
20249085.7
20258585.7
First to last qualifying date each year at Cahokia St Louis Dwtn AP For each year, a bar from the first to the last day at Cahokia St Louis Dwtn AP meeting 30 C (86 F). 1998: 13 May 1998 to 29 September 19981999: 4 June 1999 to 27 September 19992000: 11 May 2000 to 3 October 20002001: 8 April 2001 to 13 September 20012002: 15 April 2002 to 3 October 20022003: 14 April 2003 to 20 October 20032004: 17 April 2004 to 23 September 20042005: 10 May 2005 to 5 October 20052006: 13 April 2006 to 4 October 20062007: 29 April 2007 to 8 October 20072008: 30 May 2008 to 13 September 20082009: 24 April 2009 to 27 August 20092010: 23 May 2010 to 10 October 20102011: 3 April 2011 to 13 September 20112012: 1 April 2012 to 13 September 20122013: 14 May 2013 to 4 October 20132014: 5 May 2014 to 1 October 20142015: 4 May 2015 to 25 September 20152016: 25 April 2016 to 17 October 20162017: 20 March 2017 to 14 October 20172018: 1 May 2018 to 9 October 20182019: 16 May 2019 to 2 October 20192020: 7 April 2020 to 11 October 20202021: 20 May 2021 to 10 October 20212022: 10 May 2022 to 24 September 20222023: 7 May 2023 to 3 October 20232024: 27 February 2024 to 12 October 20242025: 28 April 2025 to 5 October 20251998200220062010201420182022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Cahokia St Louis Dwtn AP meeting 30 C (86 F).
First to last qualifying date each year at Cahokia St Louis Dwtn AP
YearFirst dateLast date
19981998-05-131998-09-29
19991999-06-041999-09-27
20002000-05-112000-10-03
20012001-04-082001-09-13
20022002-04-152002-10-03
20032003-04-142003-10-20
20042004-04-172004-09-23
20052005-05-102005-10-05
20062006-04-132006-10-04
20072007-04-292007-10-08
20082008-05-302008-09-13
20092009-04-242009-08-27
20102010-05-232010-10-10
20112011-04-032011-09-13
20122012-04-012012-09-13
20132013-05-142013-10-04
20142014-05-052014-10-01
20152015-05-042015-09-25
20162016-04-252016-10-17
20172017-03-202017-10-14
20182018-05-012018-10-09
20192019-05-162019-10-02
20202020-04-072020-10-11
20212021-05-202021-10-10
20222022-05-102022-09-24
20232023-05-072023-10-03
20242024-02-272024-10-12
20252025-04-282025-10-05

Every Fixed Threshold

Fixed thresholds at Cahokia St Louis Dwtn AP
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days28105201885
35 C (95 F): Days2839201221
40 C (104 F): Days3920129
90 F (32.2 C): Days2875201255
100 F (37.8 C): Days131920122
0 C (32 F): Ice days (max2833201024
0 C (32 F): Frost days (min28121201399
-10 C (14 F): Days with min2827201419
-20 C (-4 F): Days with min8320141
20 C (68 F): Tropical nights (min2877201656
25 C (77 F): Days with min20720113
10 mm (0.39 in): Days with 10 mm or more rain2747201527
25 mm (0.98 in): Days with 25 mm or more rain2717201512
50 mm (1.97 in): Days with 50 mm or more rain22620244
100 mm (3.94 in): Days with 100 mm or more rain3119991
10 cm (3.9 in): Days with 10 cm or more snowfall1120151

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 Cahokia St Louis Dwtn 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).