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

ROCKY BOY (RCBM8)

Lat: 48.25529°NLon: 109.78592°WElev: 3789.0ft.

NA

54°F

12°C

Humidity 15%
Wind Speed SSW 5 MPH
Barometer NA
Dewpoint 7°F (-14°C)
Visibility NA
Last update 27 Mar 04:18 PM MDT
Extended Forecast for

Big Sandy MT

  • Tonight

    Tonight: Mostly cloudy, with a low around 31. South wind 5 to 9 mph becoming light south southwest after midnight.

    Low: 31 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 55. Light and variable wind becoming north northwest 5 to 8 mph in the afternoon.

    High: 55 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 30. North wind 6 to 8 mph.

    Low: 30 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 51. North wind around 6 mph.

    High: 51 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 35. East wind around 8 mph.

    Low: 35 °F

    Chance Rain

  • Monday

    Monday: A chance of rain and snow, mainly before noon. Mostly cloudy, with a high near 49. West southwest wind 6 to 11 mph becoming northwest 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 49 °F

    Chance
    Rain/Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 19. North wind 6 to 15 mph, with gusts as high as 23 mph.

    Low: 19 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 44. North northeast wind 5 to 8 mph becoming southeast in the afternoon.

    High: 44 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 31. South wind 5 to 9 mph becoming light south southwest after midnight.
Saturday
Partly sunny, with a high near 55. Light and variable wind becoming north northwest 5 to 8 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 30. North wind 6 to 8 mph.
Sunday
Mostly cloudy, with a high near 51. North wind around 6 mph.
Sunday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 35. East wind around 8 mph.
Monday
A chance of rain and snow, mainly before noon. Mostly cloudy, with a high near 49. West southwest wind 6 to 11 mph becoming northwest 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Monday Night
Mostly cloudy, with a low around 19. North wind 6 to 15 mph, with gusts as high as 23 mph.
Tuesday
Mostly sunny, with a high near 44. North northeast wind 5 to 8 mph becoming southeast in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Partly sunny, with a high near 57.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 36.
Thursday
A chance of rain. Mostly cloudy, with a high near 51.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 28.
Friday
A chance of snow. Partly sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Big Sandy MT
 48.18°N 110.11°W (Elev. 2759 ft)
Last Update:
12:31 pm MDT Mar 27, 2026
Forecast Valid:
5pm MDT Mar 27, 2026-6pm MDT Apr 3, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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