Great Falls & Giant Springs, MT

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Roe River flowing from Giant Springs into Missouri River

Today’s Forecast:

☀
61°F
High: 67° | Low: 41°
Current Temperature
Clear
Station: KGTF
Observed at: 12:00 pm CST on 11/13/26
Wind: 15 mph | Humidity: 25%
Today:Mostly sunny. High near 67, with temperatures falling to around 59 in the afternoon. South southwest wind 5 to 9 mph, with gusts as high as 22 mph.
Tonight:Partly cloudy. Low around 41, with temperatures rising to around 44 overnight. South wind 3 to 7 mph.
Saturday:Mostly sunny. High near 63, with temperatures falling to around 56 in the afternoon. South southwest wind 3 to 15 mph, with gusts as high as 28 mph.
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Today’s Report:

🚲 Biking

Excellent
  97 /100

Excellent for biking. High near 62°F. Breezy winds (15 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Marginal weather factor
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Good 79/100
Good for biking. High near 50°F. Light wind (12 mph).

🛶 Paddling

Use Caution
  42 /100

Use Caution for paddling. High near 62°F. Breezy winds (15 mph).

  • Temp: Marginal weather factor
  • Rain: Favorable conditions
  • Wind: Marginal weather factor
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Not Recommended 12/100
Not Recommended for paddling. High near 50°F. Breezy winds (12 mph). Temperatures outside comfort limits (50°F).

🎪 Outdoor Events / Activities

Excellent
  97 /100

Excellent for outdoor events / activities. High near 62°F. Breezy winds (15 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Marginal weather factor
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Good 70/100
Good for outdoor events / activities. High near 50°F. Light wind (12 mph).

About Great Falls & Giant Springs

Great Falls & Giant Springs is a Montana destination for Missouri River paths, paddling access, cycling, parks, and outdoor events.

Make the Most of a Great Falls & Giant Springs 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 Great Falls & Giant Springs

  • Check current access, alerts, fire restrictions, and local forecasts before setting out.
  • Cold water, waves, current, wind, and lightning should guide launch and crossing decisions more than sunshine alone.
  • 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:

  • Giant Springs State Park
  • River’s Edge Trail
  • Black Eagle Falls
  • Ryan Dam
  • Great Falls

Plan Around the Conditions

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

7-Day Forecast for Great Falls & Giant Springs

☀
61°F
High: 67° | Low: 41°
Current Temperature
Clear
Station: KGTF
Observed at: 12:00 pm CST on 11/13/26
Wind: 15 mph | Humidity: 25%
Fri ⛅
67° 41°
0%
Sat ⛅
63° 37°
0%
Sun ⛅
59° 38°
0%
Mon 🌧
57° 36°
20%
Tue 🌧
47° 30°
33%
Wed ❄
43° 28°
30%
Thu ❄
40° 27°
35%

7-Day High Temperature Trend

67° Fri 63° Sat 59° Sun 57° Mon 47° Tue 43° Wed 40° Thu

7-Day Low Temperature Trend

41° Fri 37° Sat 38° Sun 36° Mon 30° Tue 28° Wed 27° Thu

📊 7-Day Outdoor Outlook

Good Fair Poor 100 Fri 100 Sat 100 Sun 100 Mon 19 Tue 19 Wed 19 Thu
Forecast data from the National Weather Service  |  Last Updated: November 13, 2026 9:42 pm CST

Great Falls & Giant Springs Weather by Season

Winter

Winter around Great Falls & Giant Springs 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. Cold water and ice remain serious hazards even when the air feels mild.

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. Cold water and ice remain serious hazards even when the air feels mild.

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 40–46°F, using the relevant local and elevation context.
  • Annual snowfall: commonly 35–70 inches in valleys and foothills, while nearby mountains receive much more.
  • 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.