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Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Herrin, IL
Content continues below
May
Average Temperature
High
25°
Feels 25
Low
14°
Feels 14
Average Precipitation
13 Days
Rain amount
108.2mm
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
21
22
20°
23
26°
24
26°
25
26°
26
24°
27
27°
28
28°
29
26°
30
27°
31
26°
Forecast
Friday, May 22, 2026
Day
20°
Feels 20
Wind
14 km/h E
Gust
21 km/h
Humidity
80%
P.O.P
100%
Rain
5-10 mm
Night
16°
Feels 16
Wind
7 km/h W
Gust
11 km/h
Humidity
100%
P.O.P
40%
Rain
<1 mm
Historical Averages
May 22
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.