Weather

Weather in Grand Teton National Park in summer and winter can be drastically different. Moose, the location of the Craig Thomas Discovery & Visitor Center, can see over a dozen feet of snowfall in the winter and often reaches temperatures in the eighties during summer.

In both winter and summer, signifficant weather events can occur. Check conditions information, forecasts, and avalanche warnings before recreating. Consult the safety page for information on staying safe and prepared.

 
Wildflowers in summer with the Teton Range in the distance Wildflowers in summer with the Teton Range in the distance

Left image
Wildflowers in summer

Right image
Skiers in the winter

 
 
 

Loading weather forecast...

 

Loading weather forecast...

 

Weather Radar for Northern Rockies


Provided by the National Weather Service

 
Top of the cragged Grand Teton

NPS Photo

Mountain Weather

Mountain conditions are often vastly different from those in the valley. Snow often stays in the mountains until mid-July. Afternoon storms can pop up without warning and bring lightning, rain, and hail to the peaks. Rockfall can quickly change a route.

Check Mountain Weather and NWS Teton Mountain forecast.

Avalanche Forecast

Check the Backcountry Avalanche Hazard Forecast before your trek into the alpine.

For recorded avalanche information - (307) 733-2664
To report observed avalanche activity - (307) 739-2607

Snow Depth Estimate

View current snow maps for estimated snow depths within the park. Keep in mind that snow can be present on trails even in the summer months.

 

Annual Weather Averages and Conditions

The chart below was calculated using data collected at Moose, Wyoming from 1958 to 2016.

Month Avg. Max. Temp

Avg. Min.
Temp

Avg. Precip
(inches)

Avg. Snowfall
(inches)

Avg. Snow Depth
(inches)
January
26.1
0.9
2.62
43.1
27
February
31.0
3.2
1.89
28.7
33
March
39.4
12.1
1.61
20.3
30
April
49.3
22.3
1.52
9.5
12
May
60.9
30.8
1.95
2.4
0
June
70.7
37.3
1.74
0.1
0
July
80.6
41.6
1.15
0
0
August
79.2
39.7
1.33
0
0
September
69.3
32.1
1.40
0.4
0
October
55.7
23.2
1.44
4.7
0
November
38.3
13.6
2.14
23.4
4
December
26.5
1.8
2.55
39.5
16
Annual
52.3
21.6
21.33
172.2
10
 
Hikers in raingear on trail.
Hikers in raingear on trail during inclement weather.

NPS Photo

General Conditions Overview

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.

Weather Safety

Weather changes frequently in Grand Teton National Park. Check forecasts and current conditions before recreating in the park.

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.

Consult the safety page for more tips!
 

Smoke and Air Quality

Wildland fires can have an impact on the air quality within Grand Teton National Park even if they are far away. Smoke can obscure views of the mountains and can make physical activity difficult.

Keep in mind that smoke can have severe impacts on your health, especially if you have an underlying condition.

Take a look at current wildland fire activity and research the current air quality in the park before you start your adventure!
 
Current Fire Information
Two firefighters stand in a large parking lot, while a fire approaches from beyond the trees.
Find out the current fire danger level and fire activity.
Smoke Information
Low-lying smoke obscuring the mountain range.
Smoke from neighboring wildfires can be present in Grand Teton.
 

Additional Information

 
Backcountry & Trail Conditions
Hiker on the granite canyon trail
Know what to expect before heading out on trail.
Current Conditions and Park Alerts
Smoke from wildfires obscures view of mountains
Know what to expect in the park today.
Plan Your Visit
Visitor bikes on the Grand Teton Pathway
Learn more about Grand Teton and plan your trip here.
Basic Information
Hands point to a map of Grand Teton.
Find directions, activities, operating times, and other general information about Grand Teton.
Things to Do
A hiker walks along a lake with mountains in the background.
Find things to do while in Grand Teton.

Last updated: September 11, 2026

Contact Info

Mailing Address:

P.O. Box 170
Moose, WY 83012

Phone:

307-739-3399
Talk to a Ranger? To speak to a Grand Teton National Park ranger call 307–739–3399 for visitor information Monday-Friday during business hours.

Contact Us

Tools

Stay Connected