The tables below give monthly averages for snowfall during December at cities, towns and parks in Wyoming. The numbers are for the total amount of new snow and how many days it snows at least 0.1 inches (0.25 centimetres) this month.
The snowfall totals are averages based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.
You can jump to a separate table for each region of the state: Northwest, Southwest, North - Central, Northeast and Southeast Wyoming.
Northwest Wyoming
Average total snowfall in December
| Days |
Place |
Inches |
Centimetres |
| 6.8 |
Alta |
21.7 |
55.1 |
| 3.2 |
Cody |
7.5 |
19.1 |
| 11.4 |
Jackson |
16.4 |
41.7 |
| 15.1 |
Moose |
44.1 |
112.0 |
| 14.0 |
Moran |
39.9 |
101.3 |
| 15.4 |
Yellowstone Lake |
35.4 |
89.9 |
| 10.2 |
Yellowstone Park, Mammoth |
12.6 |
32.0 |
| 15.4 |
Yellowstone Park, Old Faithful |
45.0 |
114.3 |
| 18.2 |
Yellowstone Park, South Entrance |
64.7 |
164.3 |
Southwest Wyoming
December snowfall averages
| Days |
Place |
Inches |
Centimetres |
| 3.3 |
Fontenelle Reservoir Dam |
4.5 |
11.4 |
| 4.6 |
Kemmerer |
9.5 |
24.1 |
North - Central Wyoming
Average snow for December
| Days |
Place |
Inches |
Centimetres |
| 2.0 |
Boysen Reservoir Dam |
2.2 |
5.6 |
| 4.9 |
Lander |
9.3 |
23.6 |
| 4.6 |
Riverton |
5.3 |
13.5 |
| 6.5 |
Ten Sleep |
11.2 |
28.4 |
| 2.5 |
Thermopolis |
4.5 |
11.4 |
Northeast Wyoming
Average total snowfall in December
| Days |
Place |
Inches |
Centimetres |
| 4.6 |
Buffalo |
7.0 |
17.8 |
| 5.8 |
Devils Tower |
9.6 |
24.4 |
| 6.1 |
Gillette |
8.4 |
21.3 |
| 2.8 |
Sheridan |
5.2 |
13.2 |
| 7.5 |
Sundance |
12.2 |
31.0 |
Southeast Wyoming
Average total snowfall in December
| Days |
Place |
Inches |
Centimetres |
| 7.6 |
Casper |
11.0 |
27.9 |
| 6.7 |
Cheyenne |
8.8 |
22.4 |
| 5.7 |
Douglas |
9.2 |
23.4 |
| 7.4 |
Laramie |
7.3 |
18.5 |
| 3.2 |
Torrington |
5.4 |
13.7 |