The best time to visit Wrangell St. Elias National Park is from mid-May through the beginning of September. Visitor services like shuttles are not in operation outside of these windows. Wrangell St. Elias experiences long winters and a large amount of snowfall. Roads are unmaintained and largely inaccessible after significant snowfall. There is generally snow on the ground by the end of September. During the winter high temperatures hover around 5-7 degrees Fahrenheit with lows dropping to -50 degrees F! Summers are short but generally warm with temperatures reaching into the 80s at times. August can be a wet month. We spent six days in the park in the beginning of August and experienced rain for a large portion of four of the days. You should be prepared for any weather.Â