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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Sumner, IL
Content continues below
May
Average Temperature
High
24°
Feels 25
Low
14°
Feels 13
Average Precipitation
12 Days
Rain amount
82.9mm
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
22°
9
24°
10
19°
11
18°
12
21°
13
21°
14
19°
15
23°
16
27°
17
25°
18
20°
19
19°
20
24°
21
26°
22
25°
23
24
25
26
27
28
29
30
31
Forecast
Friday, May 8, 2026
Day
22°
Feels 22
Wind
25 km/h SW
Gust
38 km/h
Humidity
48%
P.O.P
40%
Rain
~1 mm
Night
11°
Feels 11
Wind
15 km/h SW
Gust
23 km/h
Humidity
98%
P.O.P
100%
Rain
25-35 mm
Historical Averages
May 8
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.