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

43°F

6°C

Humidity 40%
Wind Speed NNW 6 MPH
Barometer NA
Dewpoint 20°F (-7°C)
Visibility NA
Wind Chill39°F (4°C)
Last update 08 Apr 03:18 PM MDT
Extended Forecast for

Big Sandy MT

  • Tonight

    Tonight: Increasing clouds, with a low around 28. Light and variable wind becoming east around 6 mph in the evening.

    Low: 28 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 54. North wind 3 to 5 mph.

    High: 54 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31. Light and variable wind becoming east southeast 5 to 7 mph in the evening.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 67. Southeast wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 67 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 41. East southeast wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 41 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 74. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 74 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 43. North wind around 7 mph becoming west after midnight. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of rain. Mostly cloudy, with a high near 60. West wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 60 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Rain likely. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Rain Likely

Detailed Forecast

Tonight
Increasing clouds, with a low around 28. Light and variable wind becoming east around 6 mph in the evening.
Thursday
Mostly sunny, with a high near 54. North wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 31. Light and variable wind becoming east southeast 5 to 7 mph in the evening.
Friday
Sunny, with a high near 67. Southeast wind 6 to 11 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 41. East southeast wind 6 to 10 mph, with gusts as high as 18 mph.
Saturday
A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 74. Calm wind becoming west southwest around 6 mph in the afternoon.
Saturday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 43. North wind around 7 mph becoming west after midnight. Chance of precipitation is 60%.
Sunday
A chance of rain. Mostly cloudy, with a high near 60. West wind 6 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Rain likely. Mostly cloudy, with a low around 33.
Monday
Rain likely, mainly before noon. Mostly cloudy, with a high near 44.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 29.
Tuesday
A slight chance of rain and snow. Partly sunny, with a high near 56.
Tuesday Night
Partly cloudy, with a low around 35.
Wednesday
Partly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Big Sandy MT
 48.16°N 110.1°W (Elev. 2717 ft)
Last Update:
12:31 pm MDT Apr 8, 2026
Forecast Valid:
3pm MDT Apr 8, 2026-6pm MDT Apr 15, 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