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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Current conditions at

Helmville MT-200 MP 53.3 (MTHLM)

Lat: 46.96826°NLon: 112.97487°WElev: 4199.0ft.

NA

68°F

20°C

Humidity 34%
Wind Speed WNW 0 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 17 Sep 01:30 PM MDT
Extended Forecast for

Helmville MT

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 80. North wind around 6 mph becoming calm.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Rain and thunderstorms likely before 11pm, then a slight chance of rain between 11pm and midnight. Mostly cloudy, with a low around 44. South southwest wind 8 to 13 mph becoming light and variable after midnight. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 44 °F

    Rain Likely
    then Partly
    Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 72. Light north wind.

    High: 72 °F

    Partly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Rain and thunderstorms likely, then rain after 3am. Low around 44. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 44 °F

    Rain

  • Saturday

    Saturday: Rain likely before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 65. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 80. North wind around 6 mph becoming calm.
Tonight
Rain and thunderstorms likely before 11pm, then a slight chance of rain between 11pm and midnight. Mostly cloudy, with a low around 44. South southwest wind 8 to 13 mph becoming light and variable after midnight. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 72. Light north wind.
Friday Night
Rain and thunderstorms likely, then rain after 3am. Low around 44. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Rain likely before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 65. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Mostly cloudy, with a low around 41.
Sunday
Sunny, with a high near 73.
Sunday Night
Mostly clear, with a low around 42.
Monday
Sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 43.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Helmville MT
 46.86°N 112.97°W (Elev. 4377 ft)
Last Update:
12:22 pm MDT Sep 17, 2026
Forecast Valid:
1pm MDT Sep 17, 2026-6pm MDT Sep 23, 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