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

HORSE THIEF (HORM8)

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

NA

70°F

21°C

Humidity 29%
Wind Speed SSW 4 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 10 May 11:39 AM MDT
Extended Forecast for

Roundup MT

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 80. Southwest wind around 8 mph.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 51. South southeast wind 5 to 8 mph.

    Low: 51 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 80. West wind 8 to 15 mph becoming north northwest in the afternoon.

    High: 80 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45. North northwest wind 10 to 15 mph becoming light after midnight.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. Light and variable wind.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 50. East southeast wind 5 to 7 mph becoming calm after midnight.

    Low: 50 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 90. Light south southwest wind becoming south 8 to 13 mph in the morning.

    High: 90 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 56. South southwest wind 8 to 14 mph.

    Low: 56 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80. West southwest wind 16 to 26 mph, with gusts as high as 43 mph. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 80. Southwest wind around 8 mph.
Tonight
Mostly cloudy, with a low around 51. South southeast wind 5 to 8 mph.
Monday
Partly sunny, with a high near 80. West wind 8 to 15 mph becoming north northwest in the afternoon.
Monday Night
Mostly clear, with a low around 45. North northwest wind 10 to 15 mph becoming light after midnight.
Tuesday
Sunny, with a high near 77. Light and variable wind.
Tuesday Night
Partly cloudy, with a low around 50. East southeast wind 5 to 7 mph becoming calm after midnight.
Wednesday
Mostly sunny and hot, with a high near 90. Light south southwest wind becoming south 8 to 13 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 56. South southwest wind 8 to 14 mph.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80. West southwest wind 16 to 26 mph, with gusts as high as 43 mph. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 51. Northwest wind 13 to 18 mph decreasing to 6 to 11 mph after midnight.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 78. West wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 48. Northwest wind 6 to 15 mph.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 76. West wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Roundup MT
 46.45°N 108.53°W (Elev. 3219 ft)
Last Update:
1:17 am MDT May 10, 2026
Forecast Valid:
12pm MDT May 10, 2026-6pm MDT May 16, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation