Weather in Keystone: December
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Average day temperature: | 27.5°F |
| Average night temperature: | 11.1°F | |
 |
Number of sunny days: | 11 days |
| Day length: | 9.4 - 9.6 hours | |
 |
Number of days with precipitation: | 2 days |
| Precipitation totals: | 1.1 in. | |
| more information | ||
14 days
forecast
forecast
| Keystone |
weather in
January
January
| Keystone |
Air temperature in December, °F
Show year:
2025
2024
2023
The highest day temperature during December of 2025 was 44°F. At the same time the lowest night temperature was -2°F. Daily and nightly averages during December were 30.5°F and 17.3°F.
Sunny, partly cloudy and cloudy days
Number of sunny, partly cloudy and cloudy days in December is almost equal.
Precipitation total in December, in.
Precipitation total value in Keystone in December is 1.1 in. Other months of the year show relatively similar values.
Wind speed in December, mph
The average wind speed value in December is 5.3 mph
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: 5.1.
Best time for vacation in Keystone
Keystone on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Keystone
Local time: 04:08
September 19, saturday
0600
37°F
NE
1 mph
1 mph
0900
50°F
N
2 mph
2 mph
1200
55°F
NE
5 mph
5 mph
1500
55°F
E
14 mph
14 mph
1800
50°F
E
7 mph
7 mph
2100
39°F
SE
2 mph
2 mph
September 20, sunday
0000
37°F
N
2 mph
2 mph
0300
37°F
N
4 mph
4 mph
