Most of Yellowstone National Park is above 7,500 feet / 2,275 meters and at northern latitude. High altitude and northern latitude mean cooler temperatures most of the year, but especially in the evenings and mornings. There have been some years when Yellowstone National Park residents have seen it snow every month. You can expect it to be warmer in the summer with temperatures in the high 70s Fahrenheit / 25° Celsius but be prepared for passing storms that could drop 2 inches of snow. The nights may drop close to freezing (32° Fahrenheit / 0° Celsius), even in the summer. So come prepared for cold evenings and mornings, especially if you are camping or hiking. When you leave your campsite, prepare it for possible thundershowers and wind. Be aware that without adequate clothing and gear, an easy day hike or boat trip can turn into a battle for survival. Exposure to wind, rain, or cold can result in hypothermia so be prepared!
Yellowstone Daily Winter Weather Reports
Yellowstone National Park 2009 / 2013 Daily Winter Weather Reports
Check out this link for more Yellowstone National Park Weather Information: Yellowstone Weather Page
Yellowstone National Park 2011 / 2012 Daily Winter Weather Reports
Yellowstone National Park 2010 / 2011 Daily Winter Weather Reports
Check out this link for more Yellowstone Weather Information: Yellowstone Weather Page
Yellowstone National Park 2009 / 2010 Daily Winter Weather Reports
Yellowstone Area Highway WebCams
(North) = Closest Entrance to Yellowstone National Park.