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 39%
Wind Speed WSW 3 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Last update 07 May 09:18 AM MDT
Extended Forecast for

Big Sandy MT

  • Today

    Today: A slight chance of showers before 2pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 72. Northwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 72 °F

    Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 41. North northwest wind 9 to 14 mph becoming light and variable in the evening. Winds could gust as high as 22 mph.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 78. South wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 78 °F

    Partly Sunny

  • Friday Night

    Friday Night: Showers likely, mainly after midnight. Cloudy, with a low around 46. West northwest wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.

    Low: 46 °F

    Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely before noon. Mostly cloudy, with a high near 66. North wind 3 to 5 mph. Chance of precipitation is 60%.

    High: 66 °F

    Showers
    Likely then
    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 41. Light and variable wind becoming south southeast around 5 mph after midnight.

    Low: 41 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 81. South southeast wind 5 to 8 mph.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 50. South southeast wind around 7 mph.

    Low: 50 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers before 2pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 72. Northwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Tonight
Partly cloudy, with a low around 41. North northwest wind 9 to 14 mph becoming light and variable in the evening. Winds could gust as high as 22 mph.
Friday
Partly sunny, with a high near 78. South wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Showers likely, mainly after midnight. Cloudy, with a low around 46. West northwest wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Saturday
Showers likely before noon. Mostly cloudy, with a high near 66. North wind 3 to 5 mph. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 41. Light and variable wind becoming south southeast around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 81. South southeast wind 5 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 50. South southeast wind around 7 mph.
Monday
Mostly sunny, with a high near 76.
Monday Night
Mostly cloudy, with a low around 44.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Mostly cloudy, with a low around 47.
Wednesday
Mostly sunny, with a high near 78.
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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:
8:31 am MDT May 7, 2026
Forecast Valid:
9am MDT May 7, 2026-6pm MDT May 13, 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