• Knightia eocaena mass mortality

    Fossil Butte

    National Monument Wyoming

Weather

thunderstorm
NPS photo
 

Expect a variety of weather conditions no matter what time of year you visit. Local weather conditions and extended forecasts are available on the National Weather Service's (NOAA) web page.



Warm days (70–90 degrees F) and moderate evenings (30–50 degrees F) are the norm for summer months. Most evenings require a light jacket. Light frosts are common on summer nights. Yes, it can snow in July.



Spring, fall and winter can be very cold; expect snow and winter conditions.

Did You Know?

sagebrush country, photo by Rich Walter

Fossil Butte National Monument is one of a few areas in southwestern Wyoming not grazed by cattle and sheep.