Pompeys Pillar, MT

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Pompeys Pillar National Monument above the Yellowstone River corridor

Today’s Forecast:

🌤
52°F
High: 67° | Low: 34°
Current Temperature
Station: MTARC
Observed at: 6:15 pm CST on 11/12/26
Wind: 8 mph | Humidity: %
This Afternoon:Mostly sunny. High near 67, with temperatures falling to around 58 in the afternoon. East wind around 1 mph.
Tonight:Partly cloudy. Low around 34, with temperatures rising to around 36 overnight. Southeast wind around 1 mph.
Friday:Partly sunny. High near 60, with temperatures falling to around 52 in the afternoon. South wind around 2 mph.
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Today’s Report:

🥾 Hiking

Excellent
  100 /100

Ideal conditions for hiking. Comfortable temperature (high near 60°F), light wind, and clear forecast.

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 100/100
Ideal conditions for hiking. Comfortable temperature (high near 61°F), light wind, and clear forecast.

🚲 Biking

Excellent
  100 /100

Ideal conditions for biking. Comfortable temperature (high near 60°F), light wind, and clear forecast.

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 100/100
Ideal conditions for biking. Comfortable temperature (high near 61°F), light wind, and clear forecast.

🎪 Outdoor Events / Activities

Excellent
  91 /100

Ideal conditions for outdoor events / activities. Comfortable temperature (high near 60°F), light wind, and clear forecast.

  • Temp: Marginal weather factor
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 93/100
Ideal conditions for outdoor events / activities. Comfortable temperature (high near 61°F), light wind, and clear forecast.

About Pompeys Pillar

Pompeys Pillar is a Montana destination for a short historic climb, river-bottom trails, cycling stops, and seasonal programs.

Make the Most of a Pompeys Pillar Day

Use the forecast to match the day’s route, launch, road access, and turnaround time to wind, precipitation, temperature, smoke, water conditions, and elevation. Keep a shorter or lower-elevation backup ready.

Weather Tips for Pompeys Pillar

  • Check current access, alerts, fire restrictions, and local forecasts before setting out.
  • Turn around before exposed ridges, overlooks, or open ground become unsafe in thunder, high wind, smoke, or poor visibility.
  • Montana weather can shift quickly; carry layers, sun protection, water, and a reliable navigation plan.
  • Allow extra daylight for remote roads, seasonal traffic, wildlife, and changing trail or shoreline conditions.

Nearby Towns and Areas

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

  • Pompeys Pillar National Monument
  • Yellowstone River
  • Huntley
  • Worden
  • Billings

Plan Around the Conditions

Choose the safest and most enjoyable version of a Pompeys Pillar day by matching the activity to current wind, precipitation, smoke, temperature, road access, trail surfaces, water conditions, and daylight.

7-Day Forecast for Pompeys Pillar

🌤
52°F
High: 67° | Low: 34°
Current Temperature
Station: MTARC
Observed at: 6:15 pm CST on 11/12/26
Wind: 8 mph | Humidity: %
Thu ⛅
67° 34°
0%
Fri ⛅
60° 34°
0%
Sat ⛅
62° 36°
0%
Sun ☀
59° 35°
0%
Mon ⛅
58° 37°
1%
Tue ⛅
53° 34°
13%
Wed ❄
47° 32°
39%

7-Day High Temperature Trend

67° Thu 60° Fri 62° Sat 59° Sun 58° Mon 53° Tue 47° Wed

7-Day Low Temperature Trend

34° Thu 34° Fri 36° Sat 35° Sun 37° Mon 34° Tue 32° Wed

📊 7-Day Outdoor Outlook

Good Fair Poor 100 Thu 100 Fri 100 Sat 100 Sun 100 Mon 85 Tue 19 Wed
Forecast data from the National Weather Service  |  Last Updated: November 12, 2026 10:16 pm CST

Pompeys Pillar Weather by Season

Winter

Winter around Pompeys Pillar can bring snow, ice, strong wind, short daylight, and abrupt cold. Check road, trail, campground, and facility access before leaving, and expect conditions to change sharply with elevation.

Spring

Spring is variable, with freeze-thaw cycles, mud, lingering mountain snow, rising water, and occasional late storms. Lower routes often open well before high-country roads and trails.

Summer

Summer generally offers the broadest access, but heat, afternoon thunderstorms, wildfire smoke, fire restrictions, gusty wind, and limited shade can alter plans. Start exposed outings early and carry more water than expected.

Fall

Fall brings cooler days, clearer periods, changing color, shorter daylight, and the possibility of early snow. Seasonal services can close before winter weather becomes continuous, so confirm local operations.

Key Climate Data Points

  • Annual average temperature: around 43–47°F, using the relevant local and elevation context.
  • Annual snowfall: commonly 25–45 inches, though wind redistribution and year-to-year swings are substantial.
  • Warmest months: July and August are normally warmest.
  • Coolest months: December and January are typically coolest.
  • Wettest season: late spring and early summer often bring the most precipitation, with local mountain variation.
  • Driest season: midsummer is often driest, although thunderstorms remain possible.
  • Best outdoor window: June through September for the broadest access, with shoulder seasons useful at lower elevations.