Grand Teton National Park Weather in September

Averages By Month

High temperature: 66°F (19°C)
Low temperature: 32°F (0°C)
Hours daylight/sun: 8 hours
Water temperature: 40°F (4°C)

Besides daytime highs still reaching 66°F (19°C) in September it can already be as cold as lows of 32°F (0°C) in Grand Teton National Park. So do prepare for wintery temperatures too. The sun shines for an average of 8 hours each day allowing you to still enjoy the beautiful outdoors whilst not getting too wet either (6 rainy days for the whole of September). The water temperatures are already really cold.

September is a fantastic time to visit Grand Teton National Park. You will be able to enjoy some of the most stunning nature in more peace and quiet since much of the summer crowd has left and the rates are getting lower too.

High and Low Temperature in September °F

Water Temperature in September °F

Current Weather Grand Teton National Park

26°F few clouds
Local Time

Hourly 10 Days

Averages Grand Teton National Park

  J F M A M J J A S O N D

High °F

25° 30° 39° 47° 57° 68° 77° 76° 66° 52° 35° 25°

Low °F

11° 20° 29° 36° 41° 39° 32° 24° 14°


5 6 8 8 9 10 11 10 8 7 5 4

Snow (inch)

12 10 10 9 9 7 5 6 6 7 11 12

Water °F

10° 20° 30° 60° 60° 60° 40° 20° 20°

Grand Teton National Park Weather by Month

Best Time to Visit Grand Teton National Park

The best time to visit Grand Teton National Park is definitely summer. Especially in midsummer it gets beautifully warm during the day however, even in summer nights cool down a lot. Fall as well will provide you with some lovely sunny days but by then nights already get as cold as lows of 24°F (-5°C). It tends to be quite rainy, especially in spring. July is the least rainy month. Winters are incredibly cold with enormous amounts of snow. Ideal for cross country skiing, snowshoeing or skiing in Jackson Hole for example. Many roads are closed during that time.

Things to know about Grand Teton National Park

There are so many ways to explore Grand Teton National Park so you can choose transport methods other than purely by car.

Hiking and Mountain Climbing

200 miles of hiking paths lead through Grand Teton National Park and allow incredible views of the unique landscape with its spiky mountains.

From easy walks around Lake Jenny or Leigh to doable hikes up the high mountains or more strenuous hikes into the backcountry- everything is possible. All you need for your exploration, including topographic maps and tour guides, is provided in the visitor centers.

If you don’t fancy hiking around on your own, you will be able to join guided tours (including wildlife tours and photography tours) during the summer months. If you’re thinking of leaving the paths and hiking into the backcountry you will need to get a special permit from one of the visitor centers. Note that open fires aren’t allowed in the backcountry and that you need to also declare any sort of mountain climbing activity.

Wildlife Watching

The Grand Teton National Park is home to many different animals. These include herbivores such as elks and bisons but also grizzlies. Coyotes, Pumas, wolves and bats are just a few of the many mammals that live there too.

The bald eagle is the most impressive of all birds domestic to the park. In the wetlands you will find birds such as pelicans.

If you feel like observing the wildlife in more detail, a boat tour along the Snake River is highly recommended. In late fall, you might also be lucky enough to watch the Wapiti herds move to the National Elk Refuge for the winter months.

Boat Tours and Fishing

The Snake River can be explored by rafting, canoeing or kayaking. During the summer months there are diverse tour organizers offering guided rides. If you are planning to explore the lakes you must get prior permission.

Fishing is allowed in the diverse lakes and rivers but must also be done under prior licence which can be acquired in many places including supermarkets.


Swimming is allowed in all the lakes in the national park, however, it’s only recommended for extremely tough swimmers as temperatures remain freezing even in summer. On Colter Bay you will find a designated beach including picnic facilities. In the Snake River, swimming is generally allowed but due to the hazards certainly wouldn’t be recommended.

Horseback Riding

In Grand Teton National Park you can enjoy shorter but also more extended rides. In Colter Bay, Jenny Lake and Jackson Lake you can rent horses. And guided rides are offered daily too.

Winter Sports

There is a lot of snow in Grand Teton National Park during the winter months. Besides cross country skiing and snowshoeing you might want to take a dog sleigh ride for a very special experience. And of course there is the nearby Jackson Hole ski resort.


The Grand Teton National Park is a popular destination for photographers due to its vast flora and fauna and of course the incredible views over the mountains. Great spots for superb shots include the Snake River Outlook, Schwabacher’s Landing and Oxhow Bend as well as the Moulton Barn.


Along the Rockefeller Parkways you will find several ‘not to miss’ viewing points. The Signal-Mountain-Viewing point is a must see too. From Teton Village you can take a cable car ride up into the mountains.

Definitely worth a visit is the Museum of Native Americans in the visitor center of Colter Bay. In the visitor center of Moose Village you can learn a lot about Jackson Hole, Mountain Men, Trapper and much more.

In Jackson you can experience some wild west and cowboy lifestyle from the old days. Take a stroll through town, take a drink in one of the rustic bars and listen to some great country music. Jackson is also a great starting point to explore the area from.

The National Elk Refuge was set up in 1912 to protect the wapitis as they used to die from starvation in the harsh winters. In over 10,000 hectares around 7,500 wapitis spend the winter months. There the animals are being fed and the whole project is financed from the sale of their antlers.

Visitor Centers

Visit the visitor centers in order to receive information, brochures or to get a license to boat or hike/climb in the backcountry. The Craig Thomas Discovery Center & Visitor Center near the park’s headquarters is open all year round. Most of the others are open from May until October. The main visitor centers are:

Grand Teton National Park Location

Other destinations by month

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