Climate in Alton, IL, United States

IndexInfo
Climate Index: 73.6
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Climate By Month in Alton, IL

MonthClimate
Score
Weather Conditions Outline
Jan8.96
Low avg 21℉
Feb17.72
Low avg 23℉
Chance of snow day 28%
Mar67.99
 
Apr91.2
 
May99.37
Chance of rainy day 43%
Jun97.84
Chance of humid day 87%
Jul95.84
Chance of humid day 97%
Aug97.01
Chance of humid day 92%
Sep100.0
 
Oct93.48
 
Nov63.05
 
Dec50.71
Low avg 30℉
Chance of cloudy day 48%

Best Months To Visit Alton, IL

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

Temperatures (table)

MonthTemp
Low Avg
Temp
High Avg
Jan 21℉ 37℉
Feb 23℉ 41℉
Mar 36℉ 55℉
Apr 45℉ 66℉
May 55℉ 75℉
Jun 64℉ 84℉
Jul 66℉ 86℉
Aug 64℉ 86℉
Sep 55℉ 79℉
Oct 46℉ 68℉
Nov 34℉ 54℉
Dec 30℉ 45℉
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