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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Casper, WY
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September
Average Temperature
High
24°
Feels 24
Low
7°
Feels 6
Average Precipitation
7 Days
Rain amount
19.8mm
Snow amount
2cm
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Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
29°
3
30°
4
30°
5
31°
6
31°
7
28°
8
26°
9
27°
10
27°
11
25°
12
25°
13
25°
14
24°
15
25°
16
25°
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Wednesday, September 2, 2026
Day
29°
Feels 29
Wind
44 km/h SW
Gust
66 km/h
Humidity
20%
P.O.P
40%
Rain
<1 mm
Night
13°
Feels 11
Wind
33 km/h SW
Gust
50 km/h
Humidity
62%
P.O.P
20%
Historical Averages
Sep 2
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.