• 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?

visitor center mural

Plant fossils, like palm fronds, tell us that 50 million years ago, southwest Wyoming's climate was much like Florida's is today.