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

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Current conditions at

ST. MARY (SRYM8)

Lat: 48.74108°NLon: 113.43289°WElev: 4557.0ft.

NA

48°F

9°C

Humidity 67%
Wind Speed ESE 0 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 03 Oct 09:11 PM MDT
Extended Forecast for

St Mary MT

  • Tonight

    Tonight: Mostly clear, with a low around 40. Light south southwest wind.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 72. Calm wind becoming southwest 5 to 9 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 72 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 50. West southwest wind 7 to 13 mph, with gusts as high as 30 mph.

    Low: 50 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 69. West southwest wind around 14 mph, with gusts as high as 30 mph.

    High: 69 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 46. West southwest wind 7 to 13 mph, with gusts as high as 29 mph.

    Low: 46 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 66. West southwest wind 6 to 11 mph, with gusts as high as 23 mph.

    High: 66 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45. West southwest wind 5 to 8 mph, with gusts as high as 18 mph.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 67. West southwest wind 5 to 9 mph, with gusts as high as 20 mph.

    High: 67 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 40. Light south southwest wind.
Sunday
Sunny, with a high near 72. Calm wind becoming southwest 5 to 9 mph in the afternoon. Winds could gust as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 50. West southwest wind 7 to 13 mph, with gusts as high as 30 mph.
Monday
Mostly sunny, with a high near 69. West southwest wind around 14 mph, with gusts as high as 30 mph.
Monday Night
Partly cloudy, with a low around 46. West southwest wind 7 to 13 mph, with gusts as high as 29 mph.
Tuesday
Mostly sunny, with a high near 66. West southwest wind 6 to 11 mph, with gusts as high as 23 mph.
Tuesday Night
Partly cloudy, with a low around 45. West southwest wind 5 to 8 mph, with gusts as high as 18 mph.
Wednesday
Mostly sunny, with a high near 67. West southwest wind 5 to 9 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
Mostly sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Partly sunny, with a high near 64.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 36.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 46.
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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:
4:41 pm MDT Oct 3, 2026
Forecast Valid:
9pm MDT Oct 3, 2026-6pm MDT Oct 10, 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

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation