Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

ST. MARY (SRYM8)

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

NA

45°F

7°C

Humidity 92%
Wind Speed SSE 3 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 27 Aug 07:11 AM MDT
Extended Forecast for

St Mary MT

  • Today

    Today: A slight chance of showers and thunderstorms between 4pm and 5pm.  Patchy smoke before noon. Mostly cloudy, with a high near 83. South southwest wind 5 to 10 mph, with gusts as high as 21 mph.  Chance of precipitation is 20%.

    High: 83 °F

    Patchy Smoke
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Patchy smoke between 8pm and midnight. Mostly clear, with a low around 50. South southwest wind 6 to 9 mph, with gusts as high as 22 mph.

    Low: 50 °F

    Patchy Smoke
    then Mostly
    Clear

  • Friday

    Friday: Patchy smoke after 9am. Sunny, with a high near 72. Southwest wind 6 to 11 mph, with gusts as high as 25 mph.

    High: 72 °F

    Patchy Smoke

  • Friday Night

    Friday Night: Partly cloudy, with a low around 45. West southwest wind 5 to 10 mph becoming light southwest  after midnight. Winds could gust as high as 23 mph.

    Low: 45 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 67. Light west southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 23 mph.

    High: 67 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers, mainly after midnight.  Partly cloudy, with a low around 41. West southwest wind 6 to 9 mph, with gusts as high as 21 mph.

    Low: 41 °F

    Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers.  Partly sunny, with a high near 60. West southwest wind 7 to 13 mph, with gusts as high as 25 mph.

    High: 60 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers before midnight.  Partly cloudy, with a low around 39. West southwest wind 6 to 13 mph, with gusts as high as 24 mph.

    Low: 39 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 4pm and 5pm. Patchy smoke before noon. Mostly cloudy, with a high near 83. South southwest wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Tonight
Patchy smoke between 8pm and midnight. Mostly clear, with a low around 50. South southwest wind 6 to 9 mph, with gusts as high as 22 mph.
Friday
Patchy smoke after 9am. Sunny, with a high near 72. Southwest wind 6 to 11 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 45. West southwest wind 5 to 10 mph becoming light southwest after midnight. Winds could gust as high as 23 mph.
Saturday
Mostly sunny, with a high near 67. Light west southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 23 mph.
Saturday Night
A 30 percent chance of showers, mainly after midnight. Partly cloudy, with a low around 41. West southwest wind 6 to 9 mph, with gusts as high as 21 mph.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 60. West southwest wind 7 to 13 mph, with gusts as high as 25 mph.
Sunday Night
A slight chance of showers before midnight. Partly cloudy, with a low around 39. West southwest wind 6 to 13 mph, with gusts as high as 24 mph.
Monday
Sunny, with a high near 69.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 71.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
St Mary MT
 48.74°N 113.44°W (Elev. 4554 ft)
7:47 am MDT Aug 27, 2026
8am MDT Aug 27, 2026-6pm MDT Sep 2, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database