National Weather Service:
Teton Forecast:
www.mountainweather.com
Bridger-Teton National Forest:
(307) 733-2664 recorded information
(307) 733-2759 report observed avalanche activity
The chart below was calculated using data collected at Moose, Wyoming from 12/1958 to 12/2001.
| | Ave Max Temp | Ave Min Temp | Ave Precip | Ave Snow
(inches) | Ave Snow Depth |
| Jan | 25.7 | 1.2 | 2.61 | 44.4 | 28 |
| Feb | 31.1 | 3.6 | 2.00 | 30.0 | 34 |
| Mar | 39.0 | 11.9 | 1.6 | 20.6 | 32 |
| Apr | 49.0 | 22.1 | 1.45 | 9.3 | 13 |
| May | 60.9 | 30.9 | 1.96 | 2.8 | 0 |
| Jun | 70.6 | 37.2 | 1.8 | 0.1 | 0 |
| Jul | 79.8 | 41.2 | 1.22 | 0 | 0 |
| Aug | 78.8 | 39.6 | 1.37 | 0 | 0 |
| Sep | 68.9 | 32.2 | 1.44 | 0.5 | 0 |
| Oct | 55.9 | 23.2 | 1.24 | 4.4 | 0 |
| Nov | 38.0 | 13.7 | 2.14 | 25.2 | 4 |
| Dec | 26.0 | 1.5 | 2.47 | 39.2 | 16 |
| Ann | 52.0 | 21.5 | 21.3 | 176.5 | 11 |
Jackson Hole has long, cold winters. The first heavy snows fall by November 1 and continue through March; snow and frost are possible during any month.
Mid-April, May, June
Mild days and cool nights alternate with rain and occasional snow. Valley trails are snow covered until late May.
July and August
Warm days and cool nights prevail, with afternoon thundershowers common.
September, October, November
Sunny days and cold nights alternate with rain and occasional snow storms.
December through mid-April
Between storms the days are sunny and nights are frigid. Snow blankets the mountains and valley. Vehicles with four-wheel drive or all-weather tires are recommended for winter travel, roads may be closed during blizzards. Drive at or below posted speed limits at all times; moose and other wildlife are often seen crossing roads during the winter.
Recommended Clothing
Raingear is recommended during spring, summer and fall. Sub-zero temperatures are common throughout winter and demand multi-layered clothing, hats, mittens and cold weather boots.
