The Weather Network
Weather
Maps
News
Video
|
Welcome
Monthly
⋮
Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Granite City, IL
Content continues below
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
27°
20
20°
21
21°
22
20°
23
26°
24
26°
25
23°
26
23°
27
25°
28
26°
29
23°
30
21°
31
20°
Forecast
Tuesday, May 19, 2026
Day
27°
Feels 29
Wind
21 km/h SW
Gust
32 km/h
Humidity
68%
P.O.P
90%
Rain
5-10 mm
Night
14°
Feels 13
Wind
15 km/h N
Gust
23 km/h
Humidity
95%
P.O.P
100%
Rain
5-10 mm
Historical Averages
May 19
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
May
Average Temperature
High
25°
Feels 26
Low
14°
Feels 14
Average Precipitation
14 Days
Rain amount
134mm
Snow amount
0cm