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

51°F

11°C

Humidity 59%
Wind Speed W 11 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 22 Apr 10:39 PM MDT
Extended Forecast for

Roundup MT

  • Tonight

    Tonight: Showers likely, mainly after 11pm. Mostly cloudy, with a low around 38. West wind 22 to 25 mph, with gusts as high as 43 mph. Chance of precipitation is 70%.

    Low: 38 °F

    Showers
    Likely

  • Thursday

    Thursday: Rain showers likely before noon, then a slight chance of rain and snow showers between noon and 5pm, then a slight chance of snow showers after 5pm. Cloudy, then gradually becoming mostly sunny, with a high near 49. Northwest wind 23 to 26 mph, with gusts as high as 38 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 49 °F

    Showers
    Likely then
    Slight Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 27. West northwest wind 13 to 18 mph decreasing to 6 to 11 mph after midnight.

    Low: 27 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

  • Friday

    Friday: A 30 percent chance of snow showers. Partly sunny, with a high near 45. Northwest wind 6 to 15 mph. Little or no snow accumulation expected.

    High: 45 °F

    Chance Snow
    Showers

  • Friday Night

    Friday Night: A 20 percent chance of snow showers. Mostly cloudy, with a low around 23. North northwest wind 6 to 14 mph.

    Low: 23 °F

    Slight Chance
    Snow Showers

  • Saturday

    Saturday: A 20 percent chance of snow showers. Partly sunny, with a high near 47. West northwest wind 5 to 8 mph becoming north in the afternoon.

    High: 47 °F

    Slight Chance
    Snow Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 24. North wind 6 to 11 mph becoming light northeast after midnight.

    Low: 24 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of snow showers, mainly after noon. Partly sunny, with a high near 45. Light north northeast wind becoming northeast 5 to 9 mph in the morning.

    High: 45 °F

    Chance Snow
    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of snow showers. Mostly cloudy, with a low around 27. Northeast wind 5 to 8 mph becoming calm after midnight.

    Low: 27 °F

    Chance Snow
    Showers

Detailed Forecast

Tonight
Showers likely, mainly after 11pm. Mostly cloudy, with a low around 38. West wind 22 to 25 mph, with gusts as high as 43 mph. Chance of precipitation is 70%.
Thursday
Rain showers likely before noon, then a slight chance of rain and snow showers between noon and 5pm, then a slight chance of snow showers after 5pm. Cloudy, then gradually becoming mostly sunny, with a high near 49. Northwest wind 23 to 26 mph, with gusts as high as 38 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday Night
A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 27. West northwest wind 13 to 18 mph decreasing to 6 to 11 mph after midnight.
Friday
A 30 percent chance of snow showers. Partly sunny, with a high near 45. Northwest wind 6 to 15 mph. Little or no snow accumulation expected.
Friday Night
A 20 percent chance of snow showers. Mostly cloudy, with a low around 23. North northwest wind 6 to 14 mph.
Saturday
A 20 percent chance of snow showers. Partly sunny, with a high near 47. West northwest wind 5 to 8 mph becoming north in the afternoon.
Saturday Night
Mostly cloudy, with a low around 24. North wind 6 to 11 mph becoming light northeast after midnight.
Sunday
A 30 percent chance of snow showers, mainly after noon. Partly sunny, with a high near 45. Light north northeast wind becoming northeast 5 to 9 mph in the morning.
Sunday Night
A 30 percent chance of snow showers. Mostly cloudy, with a low around 27. Northeast wind 5 to 8 mph becoming calm after midnight.
Monday
A chance of snow showers before 3pm, then a slight chance of rain showers. Partly sunny, with a high near 52. Calm wind. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 29. Calm wind.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 61. Calm wind becoming north 5 to 7 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 34. North wind 5 to 7 mph becoming calm in the evening.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 63. Light and variable wind becoming north 5 to 10 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:
7:34 pm MDT Apr 22, 2026
Forecast Valid:
10pm MDT Apr 22, 2026-6pm MDT Apr 29, 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