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Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Peru, Illinois Valley Regional-Walter A Duncan Field Airport, IL
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September
Average Temperature
High
25°
Feels 26
Low
13°
Feels 13
Average Precipitation
8 Days
Rain amount
66.1mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
35°
5
32°
6
28°
7
28°
8
31°
9
32°
10
27°
11
26°
12
28°
13
28°
14
28°
15
27°
16
25°
17
25°
18
24°
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Friday, September 4, 2026
Day
35°
Feels 40
Wind
16 km/h SW
Gust
24 km/h
Humidity
47%
P.O.P
10%
Night
23°
Feels 23
Wind
12 km/h SW
Gust
18 km/h
Humidity
100%
P.O.P
40%
Rain
<1 mm
Historical Averages
Sep 4
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.