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Current
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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Ottawa, IL
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Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
19°
12
24°
13
19°
14
21°
15
22°
16
27°
17
26°
18
24°
19
20°
20
21°
21
22°
22
23°
23
23°
24
24°
25
24°
26
27
28
29
30
31
Forecast
Monday, May 11, 2026
Day
19°
Feels 19
Wind
17 km/h N
Gust
26 km/h
Humidity
30%
P.O.P
0%
Night
5°
Feels 2
Wind
19 km/h E
Gust
29 km/h
Humidity
61%
P.O.P
20%
Historical Averages
May 11
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
May
Average Temperature
High
23°
Feels 23
Low
11°
Feels 10
Average Precipitation
12 Days
Rain amount
87.7mm
Snow amount
0cm