Monthly Historical AveragesChester, IL
Average Temperature
High
20°
Feels 20
Low
9°
Feels 7
Average Precipitation
10 Days
139.9mm
0.1cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastWednesday, April 15, 2026
Day
29°Feels 30
Wind
28 km/h S
Gust
42 km/h
Humidity
54%
P.O.P
30%
Night
16°Feels 15
Wind
27 km/h SW
Gust
40 km/h
Humidity
93%
P.O.P
40%
Rain
<1 mm
Historical AveragesApr 15
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity