• 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?

pronghorn antelope

There are more pronghorn antelope in the state of Wyoming than people.  One hundred or so spend the spring, summer, and fall in Fossil Butte National Monument.