Mammoth Hot Springs, WY

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Mammoth Hot Springs landscape in Wyoming
Mammoth Hot Springs landscape in Wyoming. Image by Brocken Inaglory via Wikimedia Commons, CC BY-SA 3.0.

Today’s Forecast:

🌤
47°F
High: 47° | Low: 37°
Current Temperature
Station: YLAW4
Observed at: 7:15 pm CST on 11/12/26
Wind: 2 mph | Humidity: 38%
Tonight:Mostly cloudy, with a low around 37. South southeast wind 5 to 8 mph.
Friday:Mostly cloudy. High near 55, with temperatures falling to around 49 in the afternoon. South southeast wind 7 to 13 mph.
Friday Night:Mostly cloudy, with a low around 36. South southeast wind around 9 mph.
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Today’s Report:

🥾 Hiking

Excellent
  100 /100

Excellent for hiking. High near 55°F. Light wind (13 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Good 84/100
Good for hiking. High near 48°F. Low rain risk (14%). Light wind (7 mph).

🎪 Outdoor Events / Activities

Good
  81 /100

Good for outdoor events / activities. High near 55°F. Light wind (13 mph).

  • Temp: Marginal weather factor
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Not Recommended 20/100
Not Recommended for outdoor events / activities. High near 48°F. Low rain risk (14%). Light wind (7 mph). Temperatures outside comfort limits (48°F).

⛺ Camping

Excellent
  100 /100

Excellent for camping. High near 55°F. Light wind (13 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 90/100
Excellent for camping. High near 48°F. Low rain risk (14%). Light wind (7 mph).

About Mammoth Hot Springs

Mammoth Hot Springs is a Wyoming destination for geothermal terraces, trails, historic areas, and an accessible winter gateway.

Make the Most of a Mammoth Hot Springs 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 Mammoth Hot Springs

  • 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:

  • Gardiner
  • Fort Yellowstone
  • Bunsen Peak
  • Golden Gate
  • Boiling River corridor

Plan Around the Conditions

Choose the safest version of a Mammoth Hot Springs day by matching the activity to current wind, precipitation, temperature, smoke, water or snow conditions, access, and daylight.

7-Day Forecast for Mammoth Hot Springs

🌤
47°F
High: 47° | Low: 37°
Current Temperature
Station: YLAW4
Observed at: 7:15 pm CST on 11/12/26
Wind: 2 mph | Humidity: 38%
Fri ☁
55° 36°
0%
Sat 🌧
48° 35°
14%
Sun ⛅
45° 31°
1%
Mon 🌧
51° 35°
22%
Tue ❄
47° 33°
61%
Wed ❄
42° 30°
52%
Thu ❄
41° --°
46%

7-Day High Temperature Trend

55° Fri 48° Sat 45° Sun 51° Mon 47° Tue 42° Wed 41° Thu

7-Day Low Temperature Trend

36° Fri 35° Sat 31° Sun 35° Mon 33° Tue 30° Wed 50° Thu

📊 7-Day Outdoor Outlook

Good Fair Poor 100 Fri 20 Sat 20 Sun 75 Mon 19 Tue 19 Wed 19 Thu
Forecast data from the National Weather Service  |  Last Updated: November 12, 2026 8:57 pm CST

Weather by Season

Winter

Winter at Mammoth Hot Springs can bring snow, ice, strong wind, short daylight, and abrupt road or trail changes. Confirm grooming, avalanche information, ice conditions, and facility operations for the listed winter activities.

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 34–42°F, colder on plateaus, using the relevant local and elevation context.
  • Annual snowfall: commonly 100–200 inches, with deep snow and large elevation differences.
  • 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.