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Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Chillicothe, IL
Content continues below
May
Average Temperature
High
24°
Feels 24
Low
12°
Feels 11
Average Precipitation
12 Days
Rain amount
112.1mm
Snow amount
0cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
19°
21
20°
22
17°
23
24°
24
25°
25
27°
26
26°
27
26°
28
25°
29
25°
30
24°
31
25°
Forecast
Wednesday, May 20, 2026
Day
19°
Feels 19
Wind
22 km/h N
Gust
33 km/h
Humidity
49%
P.O.P
20%
Night
8°
Feels 5
Wind
23 km/h NE
Gust
35 km/h
Humidity
71%
P.O.P
20%
Historical Averages
May 20
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.