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

27°F

-3°C

Humidity 95%
Wind Speed N 0 MPH
Barometer NA
Dewpoint 26°F (-3°C)
Visibility NA
Last update 09 Mar 11:39 PM MDT
Extended Forecast for

Roundup MT

  • Overnight

    Overnight: A 20 percent chance of snow showers before 1am. Mostly cloudy, with a low around 23. Calm wind.

    Low: 23 °F

    Slight Chance
    Snow Showers

  • Tuesday

    Tuesday: A 30 percent chance of snow showers, mainly between 1pm and 4pm. Partly sunny, with a high near 41. Calm wind becoming west 5 to 8 mph in the afternoon. Little or no snow accumulation expected.

    High: 41 °F

    Partly Sunny
    then Chance
    Snow Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow showers before 8pm. Partly cloudy, with a low around 16. Northwest wind 5 to 7 mph becoming west southwest after midnight.

    Low: 16 °F

    Slight Chance
    Snow Showers
    then Mostly
    Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 46. Southwest wind 8 to 17 mph.

    High: 46 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain and snow showers. Mostly cloudy, with a low around 31. Southwest wind 9 to 15 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 31 °F

    Chance
    Rain/Snow

  • Thursday

    Thursday: A chance of rain and snow showers before 9am, then a chance of rain showers. Mostly cloudy, with a high near 55. West southwest wind 18 to 23 mph increasing to 32 to 37 mph in the afternoon. Winds could gust as high as 50 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 55 °F

    Chance
    Rain/Snow
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Rain, possibly mixed with snow showers, becoming all snow after 9pm. Low around 28. Northwest wind 21 to 31 mph becoming east northeast 6 to 11 mph in the evening. Winds could gust as high as 44 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    Low: 28 °F

    Rain/Snow
    then Snow
    Showers

  • Friday

    Friday: Snow showers before noon, then snow showers likely, possibly mixed with rain. High near 48. East wind 5 to 11 mph becoming west in the afternoon. Chance of precipitation is 80%.

    High: 48 °F

    Snow Showers
    then
    Rain/Snow
    Likely

  • Friday Night

    Friday Night: Rain and snow showers, becoming all snow after midnight. Low around 24. West wind 8 to 13 mph becoming north after midnight. Chance of precipitation is 80%.

    Low: 24 °F

    Rain/Snow
    then Snow
    Showers

Detailed Forecast

Overnight
A 20 percent chance of snow showers before 1am. Mostly cloudy, with a low around 23. Calm wind.
Tuesday
A 30 percent chance of snow showers, mainly between 1pm and 4pm. Partly sunny, with a high near 41. Calm wind becoming west 5 to 8 mph in the afternoon. Little or no snow accumulation expected.
Tuesday Night
A 20 percent chance of snow showers before 8pm. Partly cloudy, with a low around 16. Northwest wind 5 to 7 mph becoming west southwest after midnight.
Wednesday
Mostly sunny, with a high near 46. Southwest wind 8 to 17 mph.
Wednesday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 31. Southwest wind 9 to 15 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Thursday
A chance of rain and snow showers before 9am, then a chance of rain showers. Mostly cloudy, with a high near 55. West southwest wind 18 to 23 mph increasing to 32 to 37 mph in the afternoon. Winds could gust as high as 50 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Thursday Night
Rain, possibly mixed with snow showers, becoming all snow after 9pm. Low around 28. Northwest wind 21 to 31 mph becoming east northeast 6 to 11 mph in the evening. Winds could gust as high as 44 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Friday
Snow showers before noon, then snow showers likely, possibly mixed with rain. High near 48. East wind 5 to 11 mph becoming west in the afternoon. Chance of precipitation is 80%.
Friday Night
Rain and snow showers, becoming all snow after midnight. Low around 24. West wind 8 to 13 mph becoming north after midnight. Chance of precipitation is 80%.
Saturday
Snow showers. High near 38. North northeast wind 9 to 17 mph. Chance of precipitation is 90%.
Saturday Night
Snow showers likely. Mostly cloudy, with a low around 13. North wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Chance of precipitation is 60%.
Sunday
A 20 percent chance of snow showers. Mostly cloudy, with a high near 34. West wind 3 to 6 mph.
Sunday Night
A 20 percent chance of snow showers. Mostly cloudy, with a low around 18. North northeast wind around 5 mph becoming light and variable.
Monday
A slight chance of rain and snow showers. Mostly cloudy, with a high near 49. Southwest wind 6 to 10 mph. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Roundup MT
 46.45°N 108.56°W (Elev. 3202 ft)
Last Update:
12:33 am MDT Mar 10, 2026
Forecast Valid:
12am MDT Mar 10, 2026-6pm MDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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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