Monthly Historical AveragesAlton, IL
Average Temperature
High
3°
Feels 1
Low
-5°
Feels -10
Average Precipitation
6 Days
33mm
11.3cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastThursday, January 1, 2026
Day
4°Feels 4
Wind
13 km/h NE
Gust
20 km/h
Humidity
56%
P.O.P
20%
Night
-3°Feels -6
Wind
7 km/h NE
Gust
11 km/h
Humidity
84%
P.O.P
20%
Historical AveragesJan 1
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity