Since most of the park lies at an elevation of 6,000 feet above sea level or higher, unpredictability characterizes Yellowstone's weather. Expect big temperature swings, rain, or snow during every month of the year. No matter when you visit, bring a warm jacket, rain gear, and lots of layers.
Spring & Fall
Daytime temperatures range from 30F to the 60F (0 to 20C) with overnight lows in the teens to single digits (-5C to -20C). Snow is common in the spring and fall with regular accumulations of 12" in a 24-hour period.
Daytime temperatures are often around 70F (25C) and occasionally 80F (30C) at lower elevations. Nights are usually cool and temperatures may drop below freezing at higher elevations. Thunderstorms are common in the afternoons.
Temperatures range from zero to 20F (-20C to -5C) throughout the day. Sub-zero temperatures are common, especially at night and at higher elevations. The record low temperature is -66F (-54C). Snowfall is highly variable. While the average is 150 inches a year, it is not uncommon for higher elevations to get twice that amount.
Climate consists of the long-term averages of daily weather, usually in 30-year periods. Learn how the climate is changing in Yellowstone.
Last updated: October 16, 2018