Yellowstone remains fairly cold throughout the year, and is frozen from early December up till early May. The months of June, July and August are holiday season and there are huge crowds during this time. So it's best to go during the months from September to November, as the crowds are fewer and you get to go about your trip and bookings more comfortably. Temperatures will be a bit cold so pack some warm layers!
|Month||Avg. Minimum (°C)||Avg. Maximum (°C)|