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

FLATTOP MTN. (FTMM8)

Lat: 48.80225°NLon: 113.85713°WElev: 6300.0ft.

NA

41°F

5°C

Humidity 37%
Wind Speed NA NA MPH
Barometer NA
Dewpoint 17°F (-8°C)
Visibility NA
Last update 28 Mar 12:00 PM MDT
Extended Forecast for

16 Miles W St Mary MT

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 33. Southwest wind around 15 mph, with gusts as high as 23 mph.

    High: 33 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 23. Southwest wind 13 to 15 mph, with gusts as high as 20 mph.

    Low: 23 °F

    Mostly Cloudy

  • Sunday

    Sunday: Snow likely, mainly after 4pm. The snow could be heavy at times. Mostly cloudy, with a high near 29. Breezy, with a southwest wind 14 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of 2 to 4 inches possible.

    High: 29 °F

    Mostly Cloudy
    then Heavy
    Snow and
    Breezy

  • Sunday Night

    Sunday Night: Snow. Low around 15. Breezy, with a southwest wind 20 to 22 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    Low: 15 °F

    Snow and
    Breezy

  • Monday

    Monday: Snow. The snow could be heavy at times. High near 18. West southwest wind 16 to 18 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 7 inches possible.

    High: 18 °F

    Heavy Snow

  • Monday Night

    Monday Night: A 40 percent chance of snow before midnight. Partly cloudy, with a low around 4. Southwest wind 8 to 15 mph, with gusts as high as 20 mph. New snow accumulation of around an inch possible.

    Low: 4 °F

    Chance Snow
    then Mostly
    Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 24. Southwest wind 8 to 14 mph, with gusts as high as 20 mph.

    High: 24 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 15. Southwest wind 11 to 14 mph, with gusts as high as 18 mph.

    Low: 15 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of snow after noon. Mostly cloudy, with a high near 31.

    High: 31 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 33. Southwest wind around 15 mph, with gusts as high as 23 mph.
Tonight
Mostly cloudy, with a low around 23. Southwest wind 13 to 15 mph, with gusts as high as 20 mph.
Sunday
Snow likely, mainly after 4pm. The snow could be heavy at times. Mostly cloudy, with a high near 29. Breezy, with a southwest wind 14 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of 2 to 4 inches possible.
Sunday Night
Snow. Low around 15. Breezy, with a southwest wind 20 to 22 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
Monday
Snow. The snow could be heavy at times. High near 18. West southwest wind 16 to 18 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 7 inches possible.
Monday Night
A 40 percent chance of snow before midnight. Partly cloudy, with a low around 4. Southwest wind 8 to 15 mph, with gusts as high as 20 mph. New snow accumulation of around an inch possible.
Tuesday
Partly sunny, with a high near 24. Southwest wind 8 to 14 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 15. Southwest wind 11 to 14 mph, with gusts as high as 18 mph.
Wednesday
A slight chance of snow after noon. Mostly cloudy, with a high near 31.
Wednesday Night
Snow likely. Cloudy, with a low around 22.
Thursday
Snow. Cloudy, with a high near 26.
Thursday Night
Snow likely. Mostly cloudy, with a low around 16.
Friday
Snow likely. Mostly cloudy, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
16 Miles W St Mary MT
 48.79°N 113.77°W (Elev. 7480 ft)
Last Update:
12:31 pm MDT Mar 28, 2026
Forecast Valid:
1pm MDT Mar 28, 2026-6pm MDT Apr 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation