Fossil Butte National Monument, WY

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Fossil Butte National Monument landscape in Wyoming
Fossil Butte National Monument landscape in Wyoming. Image by Matthew Dillon via Wikimedia Commons, CC BY 2.0.

Today’s Forecast:

☀
28°F
High: 50° | Low: 28°
Current Temperature
Clear
Station: KEMM
Observed at: 7:55 am CST on 11/13/26
Wind: 5 mph | Humidity: 69%
Today:Partly sunny. High near 50, with temperatures falling to around 44 in the afternoon. South wind 3 to 8 mph.
Tonight:Rain and snow showers likely between 1am and 5am, then rain and snow showers likely. Mostly cloudy, with a low around 31. South wind around 7 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Saturday:A chance of rain and snow showers before 1pm. Mostly cloudy, with a high near 41. North northwest wind 2 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
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Today’s Report:

🥾 Hiking

Fair
  65 /100

Fair for hiking. High near 40°F. Risk of rain later today (31%). Light wind (13 mph).

  • Temp: Marginal weather factor
  • Rain: Marginal weather factor
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Use Caution 40/100
Use Caution for hiking. High near 41°F. Risk of rain (50%). Light wind (13 mph).

🚲 Biking

Not Recommended
  12 /100

Not Recommended for biking. High near 40°F. Risk of rain later today (31%). Light wind (13 mph). Temperatures outside comfort limits (40°F).

  • Temp: Unfavorable weather factor
  • Rain: Marginal weather factor
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Not Recommended 3/100
Not Recommended for biking. High near 41°F. High rain probability (50%). Light wind (13 mph). Temperatures outside comfort limits (41°F).

🎪 Outdoor Events / Activities

Not Recommended
  12 /100

Not Recommended for outdoor events / activities. High near 40°F. Risk of rain later today (31%). Light wind (13 mph). Temperatures outside comfort limits (40°F).

  • Temp: Unfavorable weather factor
  • Rain: Marginal weather factor
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Not Recommended 3/100
Not Recommended for outdoor events / activities. High near 41°F. High rain probability (50%). Light wind (13 mph). Temperatures outside comfort limits (41°F).

About Fossil Butte National Monument

Fossil Butte National Monument is a Wyoming destination for a named national monument and exposed high-desert trail destination.

Make the Most of a Fossil Butte National Monument Day

Match the route, launch, facility, or turnaround time to wind, precipitation, temperature, smoke, water, snow, road access, and daylight. Keep a shorter or more sheltered backup ready.

Weather Tips for Fossil Butte National Monument

  • Check official access notices, alerts, road or trail conditions, fire restrictions, and local forecasts before leaving.
  • Turn around before exposed ridges, canyon rims, or open ground become unsafe in lightning, heat, smoke, high wind, or poor visibility.
  • Carry layers, water, navigation, sun protection, and seasonal traction or flotation appropriate to the activity.
  • Allow extra time for remote roads, mountain passes, wildlife, spring runoff, wildfire smoke, and limited winter daylight.

Nearby Towns and Areas

This page can also be useful when planning outdoor time near:

  • Kemmerer
  • Fossil Basin
  • Hams Fork
  • Diamondville
  • Bear River Valley

Plan Around the Conditions

Choose the safest version of a Fossil Butte National Monument day by matching the activity to current wind, precipitation, temperature, smoke, water or snow conditions, access, and daylight.

7-Day Forecast for Fossil Butte National Monument

☀
28°F
High: 50° | Low: 28°
Current Temperature
Clear
Station: KEMM
Observed at: 7:55 am CST on 11/13/26
Wind: 5 mph | Humidity: 69%
Fri ⛅
50° 31°
3%
Sat ❄
41° 26°
50%
Sun ⛅
42° 26°
0%
Mon ⛅
45° 28°
1%
Tue ❄
41° 25°
76%
Wed ❄
34° 23°
25%
Thu ❄
33° 21°
52%

7-Day High Temperature Trend

50° Fri 41° Sat 42° Sun 45° Mon 41° Tue 34° Wed 33° Thu

7-Day Low Temperature Trend

31° Fri 26° Sat 26° Sun 28° Mon 25° Tue 23° Wed 21° Thu

📊 7-Day Outdoor Outlook

Good Fair Poor 70 Fri 19 Sat 20 Sun 20 Mon 18 Tue 20 Wed 19 Thu
Forecast data from the National Weather Service  |  Last Updated: November 13, 2026 11:45 pm CST

Fossil Butte National Monument Weather by Season

Winter

Winter at Fossil Butte National Monument can bring snow, ice, strong wind, short daylight, and abrupt road or trail changes.

Spring

Spring brings freeze-thaw mud, snowmelt, high rivers, cold water, and lingering mountain snow. Lower routes generally open before high passes and backcountry trailheads.

Summer

Summer usually offers the broadest access, but heat, dry air, thunderstorms, lightning, wildfire smoke, reservoir wind, and cold mountain water can alter plans.

Fall

Fall brings cooler air, shorter daylight, hunting-season awareness, and early high-country snow. Confirm seasonal services and allow extra time on remote roads.

Key Climate Data Points

  • Annual average temperature: around 43–49°F, using the relevant local and elevation context.
  • Annual snowfall: commonly 20–40 inches, with frequent wind.
  • Warmest months: July and August are normally warmest.
  • Coolest months: December and January are typically coolest.
  • Wettest season: winter and spring usually provide the greatest mountain precipitation, with local variation.
  • Driest season: midsummer is generally driest, despite isolated thunderstorms.
  • Best outdoor window: June through September for broad warm-season access, with midwinter best at established winter destinations.