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

Helena Regional Airport (KHLN)

Lat: 46.60445°NLon: 111.9892°WElev: 3874.0ft.

Partly Cloudy

66°F

19°C

Humidity 55%
Wind Speed W 6 MPH
Barometer 30.15 in (1021.0 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 27 Aug 11:00 AM MDT
Extended Forecast for

Montana City MT

  • Today

    Today: A chance of showers and thunderstorms, mainly between 1pm and 3pm, then a slight chance of thunderstorms after 3pm.  Partly sunny, with a high near 89. East wind 5 to 9 mph becoming south in the afternoon. Winds could gust as high as 18 mph.  Chance of precipitation is 40%.

    High: 89 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 7pm.  Patchy smoke after midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 54. South southwest wind 3 to 7 mph.

    Low: 54 °F

    Chance
    T-storms then
    Patchy Smoke

  • Friday

    Friday: Patchy smoke before 10am. Mostly cloudy, with a high near 82. Calm wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 82 °F

    Patchy Smoke
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: A 30 percent chance of showers after midnight.  Mostly cloudy, with a low around 54. South southeast wind 3 to 7 mph.

    Low: 54 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers, then showers and possibly a thunderstorm after noon.  High near 76. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.  Chance of precipitation is 80%.

    High: 76 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm.  Low around 47. West wind around 6 mph.  Chance of precipitation is 90%.

    Low: 47 °F

    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after noon.  Partly sunny, with a high near 70. West southwest wind 5 to 14 mph, with gusts as high as 25 mph.  Chance of precipitation is 50%.

    High: 70 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 42. West northwest wind 5 to 13 mph becoming south southwest after midnight. Winds could gust as high as 23 mph.

    Low: 42 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms, mainly between 1pm and 3pm, then a slight chance of thunderstorms after 3pm. Partly sunny, with a high near 89. East wind 5 to 9 mph becoming south in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 40%.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Patchy smoke after midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 54. South southwest wind 3 to 7 mph.
Friday
Patchy smoke before 10am. Mostly cloudy, with a high near 82. Calm wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Friday Night
A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 54. South southeast wind 3 to 7 mph.
Saturday
A chance of showers, then showers and possibly a thunderstorm after noon. High near 76. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm. Low around 47. West wind around 6 mph. Chance of precipitation is 90%.
Sunday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 70. West southwest wind 5 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Sunday Night
Partly cloudy, with a low around 42. West northwest wind 5 to 13 mph becoming south southwest after midnight. Winds could gust as high as 23 mph.
Monday
Sunny, with a high near 76.
Monday Night
Mostly clear, with a low around 47.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 79.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 48.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
Montana City MT
 46.53°N 111.94°W (Elev. 4199 ft)
7:47 am MDT Aug 27, 2026
11am MDT Aug 27, 2026-6pm MDT Sep 2, 2026
 
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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