Climate in O'Fallon, MO, United States

Index
Climate Index:	72.10

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Climate By Month in O'Fallon, MO

Month	Climate Score	Weather Conditions Outline
Jan	8.96	Low avg 21℉
Feb	17.72	Low avg 23℉
Mar	63.05
Apr	93.48
May	100.00	Chance of rainy day 42%
Jun	95.61	Chance of humid day 92%
Jul	90.84	Chance of humid day 95%
Aug	91.05	Chance of humid day 97%
Sep	99.21
Oct	97.64
Nov	64.31
Dec	43.33	Low avg 28℉

Best Months To Visit O'Fallon, MO

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

Temperatures (table)

Month	Temp 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℉