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

Showers and Thunderstorms for the Eastern Third of the Country; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

Showers and thunderstorms will continue along and ahead of a cold front for the eastern third of the country. The rainfall for the Great Lakes region could prolong the ongoing flooding. Much cooler weather will filter in behind this cold front along and east of the Rockies. Where the rain is needed, the Southern High Plains, critical fire weather concerns through this weekend. Read More >

Current conditions at

Ravalli County Airport (KHRF)

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

Clear

52°F

11°C

Humidity 32%
Wind Speed NNE 8 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 18 Apr 08:15 PM MDT
Extended Forecast for

Hamilton MT

  • Tonight

    Tonight: Mostly clear, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 68. Light and variable wind.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 41. Light and variable wind.

    Low: 41 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 77. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 77 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44. West wind around 5 mph becoming calm in the evening.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: A chance of rain, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 61.

    High: 61 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Rain. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 32. Calm wind.
Sunday
Sunny, with a high near 68. Light and variable wind.
Sunday Night
Mostly cloudy, with a low around 41. Light and variable wind.
Monday
Mostly sunny, with a high near 77. Calm wind becoming west southwest around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 44. West wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 45.
Wednesday
A chance of rain, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 61.
Wednesday Night
Rain. Mostly cloudy, with a low around 38.
Thursday
Rain likely, mainly before noon. Mostly cloudy, with a high near 50.
Thursday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 29.
Friday
A slight chance of rain. Mostly sunny, with a high near 55.
Friday Night
Mostly cloudy, with a low around 30.
Saturday
Mostly sunny, with a high near 56.
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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:
2:01 pm MDT Apr 18, 2026
Forecast Valid:
8pm MDT Apr 18, 2026-6pm MDT Apr 25, 2026
 
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