Yellowstone National Park Summer Weather

Average maximum summer temperatures are usually in the 70s (25C) and occasionally in the 80s (30C) in the lower elevations. Nights are cool and temperatures may drop into the 30s and 40s (0-10C). Depending on the elevation, temperatures may even fall into the 20s (-5C) with a light freeze. June can be cool and rainy; July and August tend to be somewhat drier, although afternoon thundershowers and lightning storms are common. During lightning storms get off water or beaches and stay away from ridges, exposed places, and isolated trees. At any time of year, be prepared for sudden changes; unpredictability, more than anything else, characterizes Yellowstone's weather.

We recommend that you bring a warm jacket and rain gear even in the summer. If you plan to visit Yellowstone during spring or fall, call ahead for current weather and road information since sudden storms may result in cold temperatures, snow and/or temporary road closures. In summer, stop at visitor centers or ranger stations for weather forecasts. Always carry extra clothing when hiking.

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Featured Park
Rising above a scene rich with extraordinary wildlife, pristine lakes, and alpine terrain, the Teton Range stands monument to the people who fought to protect it. These are mountains of the imagination. Mountains that led to the creation of Grand Teton National Park where you can explore over two hundred miles of trails, float the Snake River or enjoy the serenity of this remarkable place.
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