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. Temperature and precipitation can vary dramatically depending on where you are in the park. The Northern Range, and particularly the North Entrance region, are the driest locations in the park throughout the year.
Forecast for Yellowstone National Park (taken from Yellowstone Lake)
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.
Fun Fact: Each spring, Yellowstone National Park staff spend over a month plowing massive amounts of snow to clear the roads for the upcoming travel season.
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.
Fun Fact: The record high temperature for the park was 99 degrees F (37 C) in 2002 (Mammoth Hot Springs).
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.
Fun Fact: The record low temperature for the park was -66 degrees F (-54 C) on February 9, 1933 (West Entrance, Riverside Station).