Alerts
Bears are active in Grand TetonBlack and grizzly bears are roaming throughout the park even in most winter months—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. For more information on bears checkout out Safety in Bear Country. Wildland Fire and SmokeCurrent wildland fire danger: HIGHSee the current fire activity page for more information.Smoke and Air QualityGrand Teton's air quality may be affected by fires elsewhere in the region or by prescribed fire in Grand Teton; hazy or smoky conditions are always possible. Check AirNow.gov for the smoke map. Air Quality in Grand Teton
WeatherGrand Teton National Park has long, cold winters—snow and frost are possible any month. April, May, & June - Mild days and cool nights alternate with rain and snow. July & August - Warm days and cool nights prevail, with afternoon thundershowers common. September, October, & November - Sunny days and cold nights alternate with rain and occasional snowstorms. December to April - Between storms the days are sunny and nights are frigid. Snow blankets the mountains and valley. Loading weather forecast...
Jackson Lake water levels can change depending on factors such as accumulated snow pack from the winter season, which can impact recreational opportunities. Current water levels on Jackson Lake and flow rates of Snake River can be seen online through the USGS National Water Dashboard. |
Last updated: September 12, 2026