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Current conditions at

ROCKY BOY (RCBM8)

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

NA

-9°F

-23°C

Humidity 69%
Wind Speed ENE 1 MPH
Barometer NA
Dewpoint -16°F (-27°C)
Visibility NA
Last update 23 Jan 06:18 PM MST
Extended Forecast for

Big Sandy MT

  • Tonight

    Tonight: Increasing clouds, with a temperature rising to around 4 by 5am. Wind chill values as low as -15. Calm wind becoming south around 6 mph.

    Low: -1 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 40 percent chance of snow, mainly between 2pm and 4pm.  Mostly cloudy, with a high near 17. Wind chill values as low as zero. Light and variable wind becoming north northwest 5 to 10 mph in the morning.  New snow accumulation of less than a half inch possible.

    High: 17 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow, mainly before 11pm.  Mostly cloudy, with a low around -10. North wind 5 to 9 mph becoming light  after midnight.  Little or no snow accumulation expected.

    Low: -10 °F

    Chance Snow

  • Sunday

    Sunday: Sunny, with a high near 15. Wind chill values as low as -10. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 15 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 6. South southwest wind around 7 mph.

    Low: 6 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 34. Southwest wind around 6 mph.

    High: 34 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 14. West northwest wind around 6 mph becoming light and variable  in the evening.

    Low: 14 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 37. West wind 3 to 6 mph.

    High: 37 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a temperature rising to around 4 by 5am. Wind chill values as low as -15. Calm wind becoming south around 6 mph.
Saturday
A 40 percent chance of snow, mainly between 2pm and 4pm. Mostly cloudy, with a high near 17. Wind chill values as low as zero. Light and variable wind becoming north northwest 5 to 10 mph in the morning. New snow accumulation of less than a half inch possible.
Saturday Night
A 30 percent chance of snow, mainly before 11pm. Mostly cloudy, with a low around -10. North wind 5 to 9 mph becoming light after midnight. Little or no snow accumulation expected.
Sunday
Sunny, with a high near 15. Wind chill values as low as -10. Calm wind becoming south 5 to 7 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 6. South southwest wind around 7 mph.
Monday
Mostly sunny, with a high near 34. Southwest wind around 6 mph.
Monday Night
Mostly cloudy, with a low around 14. West northwest wind around 6 mph becoming light and variable in the evening.
Tuesday
Mostly sunny, with a high near 37. West wind 3 to 6 mph.
Tuesday Night
Partly cloudy, with a low around 17.
Wednesday
Partly sunny, with a high near 41.
Wednesday Night
Mostly cloudy, with a low around 20.
Thursday
Partly sunny, with a high near 40.
Thursday Night
Mostly cloudy, with a low around 19.
Friday
Partly sunny, with a high near 40.
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ABOUT THIS FORECAST

 
Point Forecast:
Big Sandy MT
 48.18°N 110.11°W (Elev. 2759 ft)
3:42 pm MST Jan 23, 2026
7pm MST Jan 23, 2026-6pm MST Jan 30, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database