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

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Current conditions at

ROCKY BOY (RCBM8)

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

NA

41°F

5°C

Humidity 86%
Wind Speed WSW 0 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 03 Oct 10:18 PM MDT
Extended Forecast for

Big Sandy MT

  • Tonight

    Tonight: Mostly clear, with a low around 40. East southeast wind 5 to 8 mph becoming calm after midnight.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 73. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 73 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 48. South wind 5 to 8 mph.

    Low: 48 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 82. South wind 5 to 11 mph becoming west in the afternoon. Winds could gust as high as 22 mph.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 47. Southwest wind 3 to 8 mph.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73. Light southwest wind.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. Light and variable wind.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 40. East southeast wind 5 to 8 mph becoming calm after midnight.
Sunday
Sunny, with a high near 73. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 48. South wind 5 to 8 mph.
Monday
Sunny, with a high near 82. South wind 5 to 11 mph becoming west in the afternoon. Winds could gust as high as 22 mph.
Monday Night
Mostly clear, with a low around 47. Southwest wind 3 to 8 mph.
Tuesday
Sunny, with a high near 73. Light southwest wind.
Tuesday Night
Partly cloudy, with a low around 45. Calm wind.
Wednesday
Mostly sunny, with a high near 72. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 75.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 43.
Saturday
A slight chance of rain. Partly sunny, with a high near 58.
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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:
10:41 pm MDT Oct 3, 2026
Forecast Valid:
10pm MDT Oct 3, 2026-6pm MDT Oct 10, 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