• The Cathedral Group from the Teton Park Road

    Grand Teton

    National Park Wyoming

There are park alerts in effect.
show Alerts »
  • Seasonal road closures in effect

    Seasonal road closures are in effect for motorized vehicles. The Teton Park Road is closed from the Taggart Lake Trailhead to the Signal Mountain Lodge. The Moose-Wilson Road is closed from the Granite Canyon Trailhead to the Death Canyon Road. More »

  • Avalanche hazards exist in the park

    Avalanche hazards exist in the park, especially in mountain canyons and on exposed slopes. A daily avalanche forecast can be found at www.jhavalanche.org or by calling (307) 733-2664. More »

  • Bears emerging from hibernation

    Bears are beginning to emerge from hibernation. Travel in groups of three of more, make noise and carry bear spray. Visitors must stay at least 100 yards from bears. More »

Weather

National Weather Service:
Moose, WY
Riverton, WY Regional Weather
National Weather

Teton Forecast:
www.mountainweather.com

Bridger-Teton National Forest:
Backcountry Avalanche Hazard Forecast
(307) 733-2664 recorded information
(307) 739-2607 report observed avalanche activity

The chart below was calculated using data collected at Moose, Wyoming from 12/14/1958 to 12/31/2010.

Month Avg. Max. Temp

Avg. Min.
Temp

Avg. Precip
(inches)

Avg. Snowfall
(inches)

Avg. Snow Depth
(inches)

January
25.9
0.9
2.59
43.3
28

February

31.1
3.3
1.89
28.8
33
March
39.3
12.0
1.57
20.1
31
April
49.3
22.2
1.49
9.2
12
May
61.0
30.8
1.91
2.4
0
June
70.7
37.3
1.76
0.1
0
July
80.5
41.5
1.16
0
0
August
79.0
39.6
1.35
0
0
September
69.1
32.2
1.44
0.4
0
October
55.7
23.1
1.44
4.8
0
November
38.3
13.7
2.16
23.4
4
December
26.5
1.9
2.55
40.0
16
Annual
52.2
21.6
21.32
172.6
10


Jackson Hole has long, cold winters. The first heavy snows fall by November 1 and continue through April; snow and frost are possible during any month.

Mid-April, May, June
Mild days and cool nights alternate with rain and snow. Valley trails are usually 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, all-wheel drive, or all-weather tires are recommended for winter travel, roads may be closed during blizzards. Drive at or below posted speed limits as conditions warrant; 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.

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Did You Know?

Uinta Ground Squirrel

Did you know that Uinta ground squirrels, sometimes mistaken for prairie dogs, hibernate up to eight months a year? These animals leave their burrows in March or April to inhabit the sagebrush flats, but may return by the end of July.