Weather in Casper: December
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Average day temperature: | 35.6°F |
| Average night temperature: | 25.0°F | |
 |
Number of sunny days: | 17 days |
| Day length: | 9.0 - 9.3 hours | |
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Number of rainy days: | 0 days |
| Precipitation totals: | 0.2 in. | |
| more information | ||
14 days
forecast
forecast
| Casper |
weather in
January
January
| Casper |
Air temperature in December, °F
Show year:
2025
2024
2023
The highest day temperature during December of 2025 was 56°F. At the same time the lowest night temperature was 11°F. Daily and nightly averages during December were 42.3°F and 29.3°F.
Sunny, partly cloudy and cloudy days
Mostly all days in December are sunny but cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Casper in December is 0.2 in. Other months of the year show relatively similar values.
Wind speed in December, mph
The average wind speed value in December is 13.6 mph It makes December most windy month of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 6.2.
Best time for vacation in Casper
Casper on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Casper
Local time: 20:15
January 09, friday
2100
25°F
NE
11 mph
11 mph
January 10, saturday
0000
25°F
NE
12 mph
12 mph
0300
27°F
NE
12 mph
12 mph
0600
21°F
NE
14 mph
14 mph
0900
18°F
NE
14 mph
14 mph
1200
30°F
NE
18 mph
18 mph
1500
36°F
NE
17 mph
17 mph
1800
30°F
NE
13 mph
13 mph
