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

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

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

NA

56°F

13°C

Humidity 25%
Wind Speed NA 12 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Last update 19 Apr 04:10 PM MDT
Extended Forecast for

St Mary MT

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. South southwest wind 6 to 9 mph, with gusts as high as 20 mph.

    Low: 40 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 66. Southwest wind 3 to 8 mph. Winds could gust as high as 20 mph.

    High: 66 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 45. Southwest wind 6 to 8 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 72. Southwest wind around 6 mph.

    High: 72 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 42. South wind around 6 mph becoming light and variable in the evening.

    Low: 42 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of rain, then showers and possibly a thunderstorm after noon. High near 54. North northwest wind 5 to 11 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

    High: 54 °F

    Chance Rain
    then Showers

  • Wednesday Night

    Wednesday Night: Rain before 9pm, then rain and snow between 9pm and midnight, then snow likely after midnight. Low around 27. North wind 13 to 15 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 27 °F

    Rain/Snow
    then Snow
    Likely

  • Thursday

    Thursday: A chance of snow. Partly sunny, with a high near 41. North wind 11 to 13 mph, with gusts as high as 28 mph.

    High: 41 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 24.

    Low: 24 °F

    Chance Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 40. South southwest wind 6 to 9 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 66. Southwest wind 3 to 8 mph. Winds could gust as high as 20 mph.
Monday Night
Partly cloudy, with a low around 45. Southwest wind 6 to 8 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 72. Southwest wind around 6 mph.
Tuesday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 42. South wind around 6 mph becoming light and variable in the evening.
Wednesday
A chance of rain, then showers and possibly a thunderstorm after noon. High near 54. North northwest wind 5 to 11 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Wednesday Night
Rain before 9pm, then rain and snow between 9pm and midnight, then snow likely after midnight. Low around 27. North wind 13 to 15 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Thursday
A chance of snow. Partly sunny, with a high near 41. North wind 11 to 13 mph, with gusts as high as 28 mph.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 24.
Friday
A chance of snow. Partly sunny, with a high near 37.
Friday Night
A slight chance of snow. Mostly cloudy, with a low around 20.
Saturday
A slight chance of snow. Mostly sunny, with a high near 41.
Saturday Night
Partly cloudy, with a low around 20.
Sunday
Mostly sunny, with a high near 45.
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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:
12:31 pm MDT Apr 19, 2026
Forecast Valid:
5pm MDT Apr 19, 2026-6pm MDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation