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

Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Current conditions at

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

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

NA

25°F

-4°C

Humidity 85%
Wind Speed NA 0 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Last update 12 Oct 08:10 AM MDT
Extended Forecast for

St Mary MT

  • Columbus Day

    Columbus Day: Mostly sunny, with a high near 38. South wind 8 to 10 mph.

    High: 38 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 24. Southwest wind 10 to 13 mph, with gusts as high as 21 mph.

    Low: 24 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 44. Southwest wind 8 to 11 mph.

    High: 44 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 28. Southwest wind 9 to 14 mph, with gusts as high as 23 mph.

    Low: 28 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 45. West southwest wind 10 to 14 mph, with gusts as high as 26 mph.

    High: 45 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 30. West southwest wind 5 to 7 mph becoming calm after midnight.

    Low: 30 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 53. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 53 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 34. South wind 3 to 7 mph.

    Low: 34 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

Detailed Forecast

Columbus Day
Mostly sunny, with a high near 38. South wind 8 to 10 mph.
Tonight
Mostly clear, with a low around 24. Southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Tuesday
Sunny, with a high near 44. Southwest wind 8 to 11 mph.
Tuesday Night
Partly cloudy, with a low around 28. Southwest wind 9 to 14 mph, with gusts as high as 23 mph.
Wednesday
Mostly sunny, with a high near 45. West southwest wind 10 to 14 mph, with gusts as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 30. West southwest wind 5 to 7 mph becoming calm after midnight.
Thursday
Mostly sunny, with a high near 53. Calm wind becoming south southeast around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 34. South wind 3 to 7 mph.
Friday
Sunny, with a high near 60.
Friday Night
Partly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 61.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Mostly sunny, with a high near 57.
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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:
9:46 am MDT Oct 12, 2026
Forecast Valid:
11am MDT Oct 12, 2026-6pm MDT Oct 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

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Chance of Precipitation