Park Information : Yellowstone Seasons
Check the table below for each season's average daytime and nighttime temperatures, as well as some good and bad factors to consider.

Weather in Yellowstone: When's a Good Time to Visit? AUTUMN WINTER SPRING SUMMER Months: Sept. - early Oct. Daytime: 40s - 60s °F (5-20°C) Nighttime: freezing and below Months: mid-Oct. - April Daytime: around freezing to well below Nighttime: usually freezing, often below 0°F (-18°C) Months: May, June Daytime: 50s & 60s °F (teens °C) Nighttime: 30s °F (0-4°C) Months: July, Aug. Daytime: 70s - low 80s °F (20s °C) Nighttime: 40s °F or below (below 9°C) PROS: Fewer visitors Elk gathering in herds and bugling Aspen turn golden PROS: Cross-country skiing Ice-encrusted "ghost" trees Animals gather near roads Snowmobiling PROS: Baby animals numerous Wildflowers at lower elevations Waterfalls at their peak PROS: Wildflowers everywhere Drier trails Ripening berries Clear, starlit nights Great fishing CONS: Cold nights Greater chance of rain & snow CONS: Extreme cold Heavy snows and severe storms Most roads are closed to cars CONS: Some mountain passes closed Biting insects common Meadows flooded, streams very high CONS: Peak numbers of visitors Late afternoon thunderstorms Hordes of grasshoppers in dry years

Updated February 5, 2013. Copyright 2000–2013. All Rights Reserved.

Photos on this page are by Janet Chapple, unless otherwise indicated. Autumn is represented by the view from the Lamar Buffalo Ranch, Winter by a bison on Geyser Hill, Spring by Tower Fall from its base, and Summer by paintbrush flowers seen at Dunraven Pass (photo by Bruno Giletti).