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Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Oak Brook, IL
Content continues below
May
Average Temperature
High
21°
Feels 21
Low
10°
Feels 9
Average Precipitation
14 Days
Rain amount
98.3mm
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
26°
19
25°
20
14°
21
16°
22
16°
23
21°
24
22°
25
23°
26
23°
27
23°
28
24°
29
24°
30
24°
31
24°
Forecast
Monday, May 18, 2026
Day
26°
Feels 26
Wind
30 km/h S
Gust
50 km/h
Humidity
65%
P.O.P
60%
Rain
1-3 mm
Night
21°
Feels 21
Wind
28 km/h S
Gust
42 km/h
Humidity
88%
P.O.P
40%
Rain
<1 mm
Historical Averages
May 18
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.