Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

HORSE THIEF (HORM8)

Lat: 46.42581°NLon: 108.6745°WElev: 3414.0ft.

NA

91°F

33°C

Humidity 19%
Wind Speed NE 7 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Heat Index87°F (31°C)
Last update 21 Aug 03:39 PM MDT
Extended Forecast for

Roundup MT

  • Tonight

    Tonight: Increasing clouds, with a low around 61. East northeast wind 6 to 11 mph.

    Low: 61 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 4pm.  Increasing clouds and hot, with a high near 92. Northeast wind 5 to 9 mph becoming south southeast in the afternoon.

    High: 92 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 63. South southeast wind 5 to 9 mph becoming west southwest after midnight.

    Low: 63 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm.  Mostly sunny and hot, with a high near 95. West southwest wind 7 to 11 mph.  Chance of precipitation is 20%.

    High: 95 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight.  Partly cloudy, with a low around 60. West wind 5 to 9 mph.  Chance of precipitation is 20%.

    Low: 60 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 88. Light and variable wind becoming northwest around 5 mph in the afternoon.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 57. North wind 3 to 8 mph.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87. Calm wind becoming east around 6 mph in the afternoon.

    High: 87 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58. East wind around 6 mph becoming calm  after midnight.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 61. East northeast wind 6 to 11 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 4pm. Increasing clouds and hot, with a high near 92. Northeast wind 5 to 9 mph becoming south southeast in the afternoon.
Saturday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 63. South southeast wind 5 to 9 mph becoming west southwest after midnight.
Sunday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 95. West southwest wind 7 to 11 mph. Chance of precipitation is 20%.
Sunday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 60. West wind 5 to 9 mph. Chance of precipitation is 20%.
Monday
Sunny, with a high near 88. Light and variable wind becoming northwest around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 57. North wind 3 to 8 mph.
Tuesday
Mostly sunny, with a high near 87. Calm wind becoming east around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 58. East wind around 6 mph becoming calm after midnight.
Wednesday
A 20 percent chance of showers after noon. Mostly sunny and hot, with a high near 91. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 59. South southeast wind around 6 mph becoming light and variable after midnight.
Thursday
Mostly sunny, with a high near 88. West southwest wind 5 to 8 mph becoming northwest in the afternoon.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 56. North wind 3 to 7 mph.
Friday
Mostly sunny, with a high near 87. West northwest wind 3 to 6 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Roundup MT
 46.45°N 108.56°W (Elev. 3202 ft)
4:27 pm MDT Aug 21, 2026
4pm MDT Aug 21, 2026-6pm MDT Aug 28, 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