• The Cathedral Group from the Teton Park Road

    Grand Teton

    National Park Wyoming

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  • Bears are active in Grand Teton

    Black and grizzly bears are roaming throughout the park--near roads, trails and in backcountry areas. Hikers and backcountry users are advised to travel in groups of three or more, make noise and carry bear spray. Visitors must stay 100 yards from bears. More »


Dark clouds move in as a thunderstorm starts in Moose

Dark clouds move in over the mountains near Moose. Thunderstorms occur frequently in the Tetons during the summer.

The contrast in Jackson Hole between summer and winter is striking. Moose averages 14 feet of snowfall in the winter and often reaches into the 80s in the summer. As you climb into the mountains, temperatures drop 4°F for every 1,000 feet in elevation gain.

Winter may not officially start until December 21, but the first heavy snows often fall by November 1. Between winter storms the days are sunny and the nights are frigid. From December through February the average high temperature is 28°F and the average low temperature is 2°F. Stop at the Craig Thomas Discovery & Visitor Center in Moose for road information.

During spring, mild days and cool nights frequently come with rain or snow. The spring months average 11 days with measurable precipitation. Temperatures typically range from a low of 22°F to a high of 49°F during April. Valley trails remain snow-covered until late May or early June.

Between the months of June through August the average daily temperature is 77°F, but some high-elevation hiking trails don't melt out until late July. Nighttime temperatures can reach the upper 30s. Most of the year's rainfall occurs during the summer months; afternoon thunderstorms are common.

Sun and occasional rain and snow fill the short fall days. From September through November, the average daily maximum is 54°F while the minimum average is a cool 23°F. The fall months average 23 days that drop below freezing. For a comfortable trip, bring plenty of layered clothing.

For more information about weather in Grand Teton National Park, please visit our trip planning section on weather. more>>

To learn more about summer weather safety, watch our video podcast.

Did You Know?

Bill Menors Ferry

Did you know that until the 1890s no one had settled on the west bank of the Snake River in the central part of Jackson Hole? William “Bill” Menor built a ferry at Moose to shuttle patrons across the river, the only reliable crossing point between Wilson and Moran.