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Sesame Street Elmo Painted Face Mask Yellowstone’s weather can vary quite a bit, even in a single day. In the summer, daytime highs can exceed 70F (25C), only to drop 20 or more degrees when a thunderstorm rolls through. It can snow during any month of the year, and winter lows frequently drop below zero, especially at night. Some great traveler resources for weather checking are WillyWeather app and the NPS website.

Lastly, we were driving into Yellowstone after spending three absolutely incredible days exploring the Grand Tetons and Grand Teton National Park. And after a lifetime of hearing how amazingly beautiful Yellowstone is, we fully expected the Tetons to pale in comparison. So the bar for Yellowstone was set pretty high. Too high, probably.

Planning a trip to Yellowstone National Park shouldn’t be too troublesome. July and August are the only months when all facilities, roads, and services are open. Once roads open for the summer season, they are not gated at night and people may enter/exit the park 24 hours a day, seven days a week. Every other month brings a mix of options as the park prepares for, settles into, and then digs out of winter. And the Visitor education center is a great travelers resources at any time of year.

I mentioned above that no one really heeds the “do not stop on the side of the road” signs in Yellowstone, especially when wildlife is involved. I also mentioned that the park can be particularly crowded in the summer months. This means you'll need to pack some patience with you.