National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

Ravalli County Airport (KHRF)

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

Partly Cloudy

37°F

3°C

Humidity 100%
Wind Speed N 6 MPH
Barometer 29.72 in (1006.44 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 24 Dec 12:35 PM MST
Extended Forecast for

Hamilton MT

  • This Afternoon

    This Afternoon: A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 46. Southeast wind around 8 mph.

    High: 46 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Rain before 4am, then a slight chance of rain after 5am. Low around 33. South southeast wind 3 to 6 mph. Chance of precipitation is 90%.

    Low: 33 °F

    Rain then
    Chance Rain

  • Christmas Day

    Christmas Day: A slight chance of rain before 2pm, then a slight chance of rain after 3pm. Partly sunny, with a high near 46. South wind 3 to 7 mph. Chance of precipitation is 20%.

    High: 46 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 31. South wind around 8 mph.

    Low: 31 °F

    Chance Rain

  • Friday

    Friday: Rain and snow likely. Mostly cloudy, with a high near 42. South southwest wind 7 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Rain/Snow
    Likely

  • Friday Night

    Friday Night: Snow. Low around 23. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 23 °F

    Snow

  • Saturday

    Saturday: Snow likely, mainly before 11am. Mostly cloudy, with a high near 31. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 31 °F

    Snow Likely
    then Chance
    Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 13.

    Low: 13 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 46. Southeast wind around 8 mph.
Tonight
Rain before 4am, then a slight chance of rain after 5am. Low around 33. South southeast wind 3 to 6 mph. Chance of precipitation is 90%.
Christmas Day
A slight chance of rain before 2pm, then a slight chance of rain after 3pm. Partly sunny, with a high near 46. South wind 3 to 7 mph. Chance of precipitation is 20%.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 31. South wind around 8 mph.
Friday
Rain and snow likely. Mostly cloudy, with a high near 42. South southwest wind 7 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Friday Night
Snow. Low around 23. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Saturday
Snow likely, mainly before 11am. Mostly cloudy, with a high near 31. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Saturday Night
Mostly cloudy, with a low around 13.
Sunday
Mostly sunny, with a high near 31.
Sunday Night
Partly cloudy, with a low around 16.
Monday
Partly sunny, with a high near 39.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Partly sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hamilton MT
 46.24°N 114.14°W (Elev. 3678 ft)
Last Update:
1:02 pm MST Dec 24, 2025
Forecast Valid:
1pm MST Dec 24, 2025-6pm MST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation