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

40°F

4°C

Humidity 95%
Wind Speed NNE 4 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Wind Chill37°F (3°C)
Last update 17 Sep 02:15 AM MDT
Extended Forecast for

Helmville MT

  • Overnight

    Overnight: Patchy frost after 4am. Otherwise, mostly clear, with a low around 38. Calm wind.

    Low: 38 °F

    Patchy Frost

  • Thursday

    Thursday: Patchy fog before 7am. Patchy frost before 7am. Otherwise, mostly cloudy through mid morning, then becoming sunny, with a high near 80. Calm wind becoming north around 6 mph.

    High: 80 °F

    Patchy Frost
    and Patchy
    Fog then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Rain and thunderstorms likely before 10pm, then a slight chance of rain between 10pm and 11pm. Mostly cloudy, then gradually becoming mostly clear, 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 of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 44 °F

    Rain Likely
    then Partly
    Cloudy

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly cloudy, with a high near 72. Light north wind. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 9pm, then rain after 9pm. Low around 44. Calm wind. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 44 °F

    Showers

  • Saturday

    Saturday: Rain likely, mainly before noon. Mostly cloudy, with a high near 70. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 70 °F

    Rain Likely

  • Saturday Night

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

    Low: 41 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 42.

    Low: 42 °F

    Clear

Detailed Forecast

Overnight
Patchy frost after 4am. Otherwise, mostly clear, with a low around 38. Calm wind.
Thursday
Patchy fog before 7am. Patchy frost before 7am. Otherwise, mostly cloudy through mid morning, then becoming sunny, with a high near 80. Calm wind becoming north around 6 mph.
Thursday Night
Rain and thunderstorms likely before 10pm, then a slight chance of rain between 10pm and 11pm. Mostly cloudy, then gradually becoming mostly clear, 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 of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly cloudy, with a high near 72. Light north wind. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm before 9pm, then rain after 9pm. Low around 44. Calm wind. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Rain likely, mainly before noon. Mostly cloudy, with a high near 70. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Partly cloudy, with a low around 41.
Sunday
Sunny, with a high near 74.
Sunday Night
Clear, with a low around 42.
Monday
Sunny, with a high near 77.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 76.
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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:
2:00 am MDT Sep 17, 2026
Forecast Valid:
2am 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