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

Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Helmville MT-200 MP 53.3 (MTHLM)

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

NA

86°F

30°C

Humidity 21%
Wind Speed WNW 7 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Heat Index83°F (28°C)
Last update 27 Aug 03:30 PM MDT
Extended Forecast for

Helmville MT

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86. West southwest wind around 6 mph, with gusts as high as 18 mph.

    High: 86 °F

    Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 7pm. Patchy smoke between 11pm and 3am. Mostly cloudy, then gradually becoming mostly clear, with a low around 44. North wind around 6 mph becoming calm in the evening.

    Low: 44 °F

    Slight Chance
    T-storms then
    Patchy Smoke

  • Friday

    Friday: Increasing clouds, with a high near 81. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 81 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A slight chance of rain before 4am, then a slight chance of rain after 5am. Mostly cloudy, with a low around 45. Light and variable wind. Chance of precipitation is 20%.

    Low: 45 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: A chance of rain, then showers and possibly a thunderstorm after noon. High near 74. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Chance Rain
    then Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before midnight, then rain after midnight. Low around 38. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 38 °F

    Showers

  • Sunday

    Sunday: A chance of rain before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 65. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86. West southwest wind around 6 mph, with gusts as high as 18 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 7pm. Patchy smoke between 11pm and 3am. Mostly cloudy, then gradually becoming mostly clear, with a low around 44. North wind around 6 mph becoming calm in the evening.
Friday
Increasing clouds, with a high near 81. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Friday Night
A slight chance of rain before 4am, then a slight chance of rain after 5am. Mostly cloudy, with a low around 45. Light and variable wind. Chance of precipitation is 20%.
Saturday
A chance of rain, then showers and possibly a thunderstorm after noon. High near 74. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm before midnight, then rain after midnight. Low around 38. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of rain before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 65. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Mostly clear, with a low around 33.
Monday
Sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 40.
Tuesday
Sunny, with a high near 80.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 39.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 74.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 38.
Thursday
A chance of rain. Partly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
Helmville MT
 46.86°N 112.97°W (Elev. 4377 ft)
Last Update:
2:01 pm MDT Aug 27, 2026
Forecast Valid:
3pm MDT Aug 27, 2026-6pm MDT Sep 3, 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