Keystone Weather: December
 |
Average Day Temperature: | 25.0°F |
|
Average Night Temperature: | 6.7°F |
|
Number of Sunny Days: | 11 days |
| Sunshine Hours: | 9.4 - 9.6 hours | |
|
Number of Rainy Days: | 0 days |
| Precipitation Totals: | 1.1 in | |
|
Number of Snowy Days: | 2 days |
| detailed information | ||
14 day weather
forecast
forecast
| Keystone |
When is the Best
Time to Visit?
Time to Visit?
| Keystone |
Air Temperature in December, °F
The highest day temperature in December 2025 was 44°F. The lowest night temperature was -8°F. The average values for day and night temperatures during December were 28.4°F и 13.6°F respectivly.
Sunny, Cloudy and Gloomy days
You can expect various weather conditions during December. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in December, in
Precipitation total in December for Keystone is 1.1 in. It makes december one of the least rainy months of the year.
Wind Speed in December, mph
The average wind speed in December is 5.3 mph. This value is relatively stable throughout the year.
Average Sunny Hours Per Day
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Keystone in December is 5.2 hours.
Keystone on the Weather Map
USA Resorts:
NAME
F°
| Boston |  |
+58 |
| Chicago | |
+60 |
| Hawaii |  |
+82 |
| Houston |  |
+84 |
| Las Vegas |  |
+92 |
| Los Angeles | |
+102 |
| Maui |  |
+74 |
| Miami | |
+88 |
| Myrtle Beach | |
+70 |
| New York | |
+62 |
| San Diego | |
+84 |
| San Francisco | |
+66 |
| Santa Monica | |
+94 |
| Sarasota | |
+84 |
| Washington | |
+64 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Keystone
Local time: 18:54
05 oct, monday
| 2100 |  |
38°F | S 2 mph |
06 oct, tuesday
| 0000 | |
36°F | SE 2 mph |
| 0300 |  |
34°F | SE 2 mph |
| 0600 | |
34°F | SE 2 mph |
| 0900 | |
54°F | SE 2 mph |
| 1200 | |
66°F | S 3 mph |
| 1500 | |
68°F | S 1 mph |
| 1800 |  |
50°F | E 5 mph |