Climate in O'Fallon, MO, United States

IndexInfo
Climate Index: 72.10
     Switch to metric measurement units

Climate By Month in O'Fallon, MO

MonthClimate
Score
Weather Conditions Outline
Jan8.96
Low avg 21℉
Feb17.72
Low avg 23℉
Mar63.05
 
Apr93.48
 
May100.00
Chance of rainy day 42%
Jun95.61
Chance of humid day 92%
Jul90.84
Chance of humid day 95%
Aug91.05
Chance of humid day 97%
Sep99.21
 
Oct97.64
 
Nov64.31
 
Dec43.33
Low avg 28℉

Best Months To Visit O'Fallon, MO

Best months to visit: April, May, June, July, August, September, October.

Temperatures (table)

MonthTemp
Low Avg
Temp
High Avg
Jan 21℉ 41℉
Feb 23℉ 45℉
Mar 34℉ 55℉
Apr 46℉ 68℉
May 57℉ 79℉
Jun 66℉ 88℉
Jul 68℉ 90℉
Aug 66℉ 88℉
Sep 59℉ 82℉
Oct 48℉ 72℉
Nov 34℉ 55℉
Dec 28℉ 46℉
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