Island Park, ID

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One of many meadows in Island Park that reveals the flat bottom of caldera floor. This meadow is near Mesa Falls. The peaks in background are the Grand Tetons.
One of many meadows in Island Park that reveals the flat bottom of caldera floor. This meadow is near Mesa Falls. The peaks in background are the Grand Tetons.. Image by Originally uploaded by Metrodyne via Wikimedia Commons, Public domain.

Today’s Forecast:

🌤
47°F
High: 47° | Low: 28°
Current Temperature
Station: IPFI1
Observed at: 5:54 pm CST on 11/12/26
Wind: 0 mph | Humidity: 34%
Tonight:Mostly cloudy. Low around 28, with temperatures rising to around 31 overnight. East northeast wind around 2 mph.
Friday:Mostly cloudy. High near 55, with temperatures falling to around 48 in the afternoon. Southeast wind 2 to 7 mph, with gusts as high as 18 mph.
Friday Night:A chance of rain between 11pm and 2am, then rain and snow likely. Mostly cloudy. Low around 30, with temperatures rising to around 33 overnight. Southeast wind around 3 mph. Chance of precipitation is 60%.
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Today’s Report:

🥾 Hiking

Excellent
  94 /100

Excellent for hiking. High near 54°F. Low rain risk (1%). Light wind (7 mph).

  • Temp: Marginal weather factor
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Not Recommended 12/100
Not Recommended for hiking. High near 40°F. High rain probability (76%).

⛺ Camping

Excellent
  100 /100

Excellent for camping. High near 54°F. Low rain risk (1%). Light wind (7 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Not Recommended 12/100
Not Recommended for camping. High near 40°F. High rain probability (76%).

🛶 Paddling

Not Recommended
  23 /100

Not Recommended for paddling. High near 54°F. Low rain risk (1%). Light wind (7 mph). Temperatures outside comfort limits (54°F).

  • Temp: Unfavorable weather factor
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Not Recommended 4/100
Not Recommended for paddling. High near 40°F. High rain probability (76%). Temperatures outside comfort limits (40°F).

About Island Park

Island Park is an Idaho destination for Idaho’s premier snowmobile region and a four-season Yellowstone gateway.

Make the Most of an Island Park 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 Island Park

  • Check official access notices, alerts, road or trail conditions, fire restrictions, and local forecasts before leaving.
  • Check river flow, reservoir wind, cold-water conditions, waves, lightning, and verified local ice reports before water plans; no forecast alone proves that ice is safe.
  • Carry layers, water, navigation, sun protection, and seasonal traction or flotation appropriate to the activity.
  • Allow extra time for remote roads, mountain passes, wildfire smoke, spring runoff, and limited winter daylight.

Nearby Towns and Areas

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

  • Big Springs
  • Mack’s Inn
  • Henrys Lake
  • Mesa Falls
  • West Yellowstone

Plan Around the Conditions

Choose the safest version of an Island Park day by matching the activity to current wind, precipitation, temperature, smoke, water or snow conditions, access, and daylight.

7-Day Forecast for Island Park, ID

🌤
47°F
High: 47° | Low: 28°
Current Temperature
Station: IPFI1
Observed at: 5:54 pm CST on 11/12/26
Wind: 0 mph | Humidity: 34%
Fri ☁
55° 30°
1%
Sat ❄
41° 26°
76%
Sun ⛅
42° 26°
3%
Mon 🌧
47° 29°
32%
Tue ❄
43° 27°
64%
Wed ❄
37° 25°
67%
Thu ❄
38° --°
49%

7-Day High Temperature Trend

55° Fri 41° Sat 42° Sun 47° Mon 43° Tue 37° Wed 38° Thu

7-Day Low Temperature Trend

30° Fri 26° Sat 26° Sun 29° Mon 27° Tue 25° Wed 50° Thu

📊 7-Day Outdoor Outlook

Good Fair Poor 100 Fri 18 Sat 20 Sun 19 Mon 19 Tue 19 Wed 19 Thu
Forecast data from the National Weather Service  |  Last Updated: November 12, 2026 8:10 pm CST

Island Park Weather by Season

Winter

Winter at Island Park can bring snow, ice, wind, short daylight, and rapidly changing road or trail access. 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 usually open well before high passes and backcountry trailheads.

Summer

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

Fall

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

Key Climate Data Points

  • Annual average temperature: around 35–42°F, using the relevant local and elevation context.
  • Annual snowfall: commonly 80–150 inches, with a long snow season.
  • 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 October for warm-season access, with midwinter best at established winter destinations.