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Monthly
Forecasts
Current
Hourly
7 Days
14 Days
Monthly
°C
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Chester, IL
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January
Average Temperature
High
5°
Feels 2
Low
-4°
Feels -9
Average Precipitation
6 Days
Rain amount
38.3mm
Snow amount
11cm
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Daily Historical Averages
January 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
5°
15
1°
16
8°
17
-3°
18
0°
19
-4°
20
-1°
21
7°
22
4°
23
10°
24
6°
25
-2°
26
-3°
27
4°
28
-4°
29
30
31
Forecast
Wednesday, January 14, 2026
Day
5°
Feels 0
Wind
35 km/h NW
Gust
53 km/h
Humidity
42%
P.O.P
20%
Night
-7°
Feels -12
Wind
28 km/h NW
Gust
42 km/h
Humidity
53%
P.O.P
0%
Historical Averages
Jan 14
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.