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

Early Spring Heat Wave in the Southwest U.S.; Critical Fire Weather in the Central Rockies and Plains

An unusual early Spring heat wave will continue much above-normal temperatures over the Southwest U.S. through early next week. Periods of critical fire weather will persist from the central Rockies to the central Plains through the weekend as gusty winds and low relative humidity continue. Read More >

Current conditions at

ROCKY BOY (RCBM8)

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

NA

51°F

11°C

Humidity 55%
Wind Speed SSW 0 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 19 Mar 10:18 PM MDT
Extended Forecast for

Big Sandy MT

  • Tonight

    Tonight: A 20 percent chance of rain after 5am. Mostly cloudy, with a low around 51. South southwest wind 9 to 11 mph, with gusts as high as 18 mph.

    Low: 51 °F

    Slight Chance
    Rain

  • Friday

    Friday: A 30 percent chance of rain, mainly before 10am. Mostly cloudy, with a high near 79. Breezy, with a west wind 9 to 14 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph.

    High: 79 °F

    Chance Rain
    then Partly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 50. Breezy, with a south southwest wind 18 to 23 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 32 mph.

    Low: 50 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Saturday

    Saturday: A 50 percent chance of rain, mainly between 7am and 5pm. Cloudy, with a high near 58. South southwest wind 9 to 15 mph becoming north northeast in the afternoon. Winds could gust as high as 23 mph.

    High: 58 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A slight chance of rain before 9pm, then a slight chance of rain and snow. Partly cloudy, with a low around 27. North northeast wind 5 to 14 mph becoming west northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Slight Chance
    Rain/Snow

  • Sunday

    Sunday: Sunny, with a high near 55. West wind 5 to 11 mph, with gusts as high as 20 mph.

    High: 55 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 30. West wind 5 to 11 mph, with gusts as high as 20 mph.

    Low: 30 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 56. Light and variable wind becoming west northwest 5 to 8 mph in the morning.

    High: 56 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of rain after 5am. Mostly cloudy, with a low around 51. South southwest wind 9 to 11 mph, with gusts as high as 18 mph.
Friday
A 30 percent chance of rain, mainly before 10am. Mostly cloudy, with a high near 79. Breezy, with a west wind 9 to 14 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph.
Friday Night
Mostly cloudy, with a low around 50. Breezy, with a south southwest wind 18 to 23 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 32 mph.
Saturday
A 50 percent chance of rain, mainly between 7am and 5pm. Cloudy, with a high near 58. South southwest wind 9 to 15 mph becoming north northeast in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
A slight chance of rain before 9pm, then a slight chance of rain and snow. Partly cloudy, with a low around 27. North northeast wind 5 to 14 mph becoming west northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 55. West wind 5 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 30. West wind 5 to 11 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, with a high near 56. Light and variable wind becoming west northwest 5 to 8 mph in the morning.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Mostly cloudy, with a high near 60.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 42.
Wednesday
Mostly sunny, with a high near 64.
Wednesday Night
A slight chance of rain and snow. Partly cloudy, with a low around 27.
Thursday
A slight chance of snow. Mostly sunny, with a high near 47.
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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:
11:17 pm MDT Mar 19, 2026
Forecast Valid:
11pm MDT Mar 19, 2026-6pm MDT Mar 26, 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