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
Mettawa, IL
Content continues below
May
Average Temperature
High
20°
Feels 20
Low
9°
Feels 8
Average Precipitation
12 Days
Rain amount
93.6mm
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
26°
18
26°
19
25°
20
13°
21
13°
22
17°
23
20°
24
23°
25
23°
26
24°
27
24°
28
23°
29
23°
30
23°
31
23°
Forecast
Sunday, May 17, 2026
Day
26°
Feels 26
Wind
22 km/h S
Gust
39 km/h
Humidity
54%
P.O.P
40%
Rain
<1 mm
Night
22°
Feels 22
Wind
28 km/h S
Gust
42 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.