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7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Pontiac, IL
Content continues below
May
Average Temperature
High
23°
Feels 24
Low
11°
Feels 10
Average Precipitation
12 Days
Rain amount
90.7mm
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
31°
18
25°
19
26°
20
18°
21
18°
22
21°
23
24°
24
23°
25
24°
26
24°
27
24°
28
25°
29
24°
30
25°
31
24°
Forecast
Sunday, May 17, 2026
Day
31°
Feels 31
Wind
36 km/h S
Gust
54 km/h
Humidity
40%
P.O.P
30%
Night
22°
Feels 22
Wind
38 km/h S
Gust
57 km/h
Humidity
69%
P.O.P
40%
Rain
<1 mm
Historical Averages
May 17
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.