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

Lake Effect Snow through Saturday: A Series of Storms Impact the West

Lake effect snow showers will continue through Saturday downwind of Lakes Erie, Ontario and the eastern portion of Lake Superior. A series of storm systems will continue to impact California and the Pacific Northwest through the weekend and into next week, bringing widespread rainfall, mountain snowfall, and gusty winds. Coastal flooding is expected in northern California. Read More >

Current conditions at

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

Lat: 48.74111°NLon: 113.43306°WElev: 4550.0ft.

NA

36°F

2°C

Humidity 66%
Wind Speed NA 9 MPH
Barometer NA
Dewpoint 26°F (-3°C)
Visibility NA
Wind Chill29°F (-2°C)
Last update 02 Jan 06:10 AM MST
Extended Forecast for

St Mary MT

  • Today

    Today: A slight chance of snow before 10am, then a chance of rain and snow. Partly sunny, with a high near 39. Southwest wind 9 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 39 °F

    Chance
    Rain/Snow

  • Tonight

    Tonight: Mostly cloudy, with a low around 33. South wind 6 to 10 mph, with gusts as high as 22 mph.

    Low: 33 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 44. South southwest wind 6 to 13 mph, with gusts as high as 26 mph.

    High: 44 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 36. Southwest wind around 14 mph, with gusts as high as 32 mph.

    Low: 36 °F

    Chance Rain

  • Sunday

    Sunday: A chance of rain before 8am, then a chance of rain and snow between 8am and 5pm, then a chance of snow after 5pm. Partly sunny, with a high near 41. Southwest wind 15 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 41 °F

    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A slight chance of snow before 8pm, then a slight chance of rain and snow between 8pm and 2am, then a slight chance of snow after 2am. Mostly cloudy, with a low around 32. Southwest wind 13 to 16 mph, with gusts as high as 36 mph. Chance of precipitation is 20%.

    Low: 32 °F

    Slight Chance
    Rain/Snow

  • Monday

    Monday: A 30 percent chance of snow, mainly after 11am. Partly sunny, with a high near 38. West southwest wind 11 to 14 mph, with gusts as high as 30 mph. Little or no snow accumulation expected.

    High: 38 °F

    Chance Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 28. West southwest wind 13 to 16 mph, with gusts as high as 36 mph.

    Low: 28 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of snow after 11am. Mostly cloudy, with a high near 34.

    High: 34 °F

    Slight Chance
    Snow

Detailed Forecast

Today
A slight chance of snow before 10am, then a chance of rain and snow. Partly sunny, with a high near 39. Southwest wind 9 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Tonight
Mostly cloudy, with a low around 33. South wind 6 to 10 mph, with gusts as high as 22 mph.
Saturday
Mostly sunny, with a high near 44. South southwest wind 6 to 13 mph, with gusts as high as 26 mph.
Saturday Night
A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 36. Southwest wind around 14 mph, with gusts as high as 32 mph.
Sunday
A chance of rain before 8am, then a chance of rain and snow between 8am and 5pm, then a chance of snow after 5pm. Partly sunny, with a high near 41. Southwest wind 15 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Sunday Night
A slight chance of snow before 8pm, then a slight chance of rain and snow between 8pm and 2am, then a slight chance of snow after 2am. Mostly cloudy, with a low around 32. Southwest wind 13 to 16 mph, with gusts as high as 36 mph. Chance of precipitation is 20%.
Monday
A 30 percent chance of snow, mainly after 11am. Partly sunny, with a high near 38. West southwest wind 11 to 14 mph, with gusts as high as 30 mph. Little or no snow accumulation expected.
Monday Night
Mostly cloudy, with a low around 28. West southwest wind 13 to 16 mph, with gusts as high as 36 mph.
Tuesday
A slight chance of snow after 11am. Mostly cloudy, with a high near 34.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 26.
Wednesday
A chance of snow. Partly sunny, with a high near 33.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 21.
Thursday
A slight chance of snow. Partly sunny, with a high near 29.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
St Mary MT
 48.74°N 113.44°W (Elev. 4554 ft)
Last Update:
4:37 am MST Jan 2, 2026
Forecast Valid:
6am MST Jan 2, 2026-6pm MST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation