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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Ravalli County Airport (KHRF)

Lat: 46.25463°NLon: 114.1246°WElev: 3644.0ft.

Mostly Cloudy

54°F

12°C

Humidity 87%
Wind Speed SSE 5 MPH
Barometer 30.01 in (1016.26 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 17 Aug 11:15 PM MDT
Extended Forecast for

Corvallis MT

  • Tonight

    Tonight: A 30 percent chance of showers before midnight. Partly cloudy, with a low around 52. Light and variable wind.

    Low: 52 °F

    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after noon. Mostly cloudy, then gradually becoming sunny, with a high near 87. Light and variable wind becoming west northwest around 6 mph in the afternoon.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 56. West wind around 6 mph becoming light and variable in the evening.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Calm wind becoming west around 6 mph in the afternoon.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 56. Northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 56 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

Detailed Forecast

Tonight
A 30 percent chance of showers before midnight. Partly cloudy, with a low around 52. Light and variable wind.
Monday
A 30 percent chance of showers and thunderstorms after noon. Mostly cloudy, then gradually becoming sunny, with a high near 87. Light and variable wind becoming west northwest around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 56. West wind around 6 mph becoming light and variable in the evening.
Tuesday
Sunny, with a high near 93. Calm wind becoming west around 6 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 56. Northwest wind 5 to 7 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 50.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 51.
Saturday
Sunny, with a high near 91.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Corvallis MT
 46.31°N 114.1°W (Elev. 3565 ft)
Last Update:
2:30 pm MDT Aug 17, 2025
Forecast Valid:
11pm MDT Aug 17, 2025-6pm MDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation