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

46°F

8°C

Humidity 89%
Wind Speed NA NA MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 15 Jul 08:10 AM MDT
Extended Forecast for

St Mary MT

  • Today

    Today: Rain before 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then a chance of rain after 3pm. High near 51. Northeast wind 9 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 51 °F

    Rain then
    Showers
    Likely

  • Tonight

    Tonight: A 20 percent chance of rain before 9pm. Patchy fog after 1am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 37. Northeast wind 5 to 9 mph becoming light and variable after midnight.

    Low: 37 °F

    Slight Chance
    Rain then
    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, sunny, with a high near 69. Southwest wind 5 to 8 mph becoming southeast in the afternoon.

    High: 69 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45. Southeast wind 5 to 8 mph becoming calm after midnight.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 71. Calm wind becoming north 5 to 8 mph in the morning.

    High: 71 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 45. North wind around 6 mph becoming calm after midnight.

    Low: 45 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 74. Calm wind becoming east 5 to 7 mph in the afternoon.

    High: 74 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 51. South southeast wind around 6 mph becoming light and variable after midnight.

    Low: 51 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

Detailed Forecast

Today
Rain before 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then a chance of rain after 3pm. High near 51. Northeast wind 9 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tonight
A 20 percent chance of rain before 9pm. Patchy fog after 1am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 37. Northeast wind 5 to 9 mph becoming light and variable after midnight.
Wednesday
Patchy fog before 8am. Otherwise, sunny, with a high near 69. Southwest wind 5 to 8 mph becoming southeast in the afternoon.
Wednesday Night
Partly cloudy, with a low around 45. Southeast wind 5 to 8 mph becoming calm after midnight.
Thursday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 71. Calm wind becoming north 5 to 8 mph in the morning.
Thursday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 45. North wind around 6 mph becoming calm after midnight.
Friday
Mostly sunny, with a high near 74. Calm wind becoming east 5 to 7 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 51. South southeast wind around 6 mph becoming light and variable after midnight.
Saturday
Partly sunny, with a high near 77.
Saturday Night
Mostly cloudy, with a low around 51.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 49.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 71.
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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:
8:29 am MDT Jul 15, 2025
Forecast Valid:
8am MDT Jul 15, 2025-6pm MDT Jul 21, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation