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

JETTE (JETM8)

Lat: 47.76706°NLon: 114.23378°WElev: 3593.0ft.

NA

36°F

2°C

Humidity 71%
Wind Speed E 0 MPH
Barometer NA
Dewpoint 27°F (-3°C)
Visibility NA
Last update 19 Apr 05:43 AM MDT
Extended Forecast for

Big Arm MT

  • Today

    Today: Mostly sunny, with a high near 65. Light and variable wind.

    High: 65 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 72. Light southeast wind.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 76. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain, then showers and possibly a thunderstorm after noon. High near 63. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 63 °F

    Chance Rain
    then Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Showers

  • Thursday

    Thursday: A chance of rain. Partly sunny, with a high near 51.

    High: 51 °F

    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 65. Light and variable wind.
Tonight
Partly cloudy, with a low around 45. Calm wind.
Monday
Sunny, with a high near 72. Light southeast wind.
Monday Night
Mostly clear, with a low around 49. Calm wind.
Tuesday
Mostly sunny, with a high near 76. Calm wind becoming east southeast around 5 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 50.
Wednesday
A chance of rain, then showers and possibly a thunderstorm after noon. High near 63. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers and possibly a thunderstorm before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 40.
Thursday
A chance of rain. Partly sunny, with a high near 51.
Thursday Night
A slight chance of rain before midnight. Mostly cloudy, with a low around 35.
Friday
A slight chance of rain and snow. Mostly sunny, with a high near 52.
Friday Night
Mostly cloudy, with a low around 34.
Saturday
Partly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Big Arm MT
 47.8°N 114.28°W (Elev. 3061 ft)
Last Update:
2:00 am MDT Apr 19, 2026
Forecast Valid:
6am MDT Apr 19, 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