Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >

Current conditions at

ST. REGIS (STGM8)

Lat: 47.30711°NLon: 115.10761°WElev: 2678.0ft.

NA

38°F

3°C

Humidity 96%
Wind Speed NNE 0 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 19 May 01:02 AM MDT
Extended Forecast for

3 Miles SE St. Regis MT

Frost Advisory until May 19, 09:00am
Click here for hazard details and duration
Frost Advisory
  •  
    Frost Advisory until May 19, 09:00am

    NOW until 9:00am Tue

    Frost Advisory

  • Overnight

    Low: 33 °F

    Frost

  • Tuesday

    Tuesday: A slight chance of rain between 2pm and 3pm, then a slight chance of showers and thunderstorms after 3pm.  Widespread frost, mainly before 7am.  Otherwise, partly sunny, with a high near 65. Calm wind becoming west southwest around 5 mph in the afternoon.  Chance of precipitation is 20%.

    High: 65 °F

    Frost then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. West wind around 5 mph becoming calm  in the evening.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain between 11am and 3pm, then showers likely and possibly a thunderstorm after 3pm.  Partly sunny, with a high near 66. Calm wind becoming west northwest around 5 mph in the afternoon.  Chance of precipitation is 60%.

    High: 66 °F

    Chance Rain
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 9pm, then rain likely between 9pm and midnight.  Mostly cloudy, with a low around 38. North northwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 38 °F

    Showers
    Likely then
    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Overnight
Widespread frost, mainly after 5am. Otherwise, partly cloudy, with a low around 33. Calm wind.
Tuesday
A slight chance of rain between 2pm and 3pm, then a slight chance of showers and thunderstorms after 3pm. Widespread frost, mainly before 7am. Otherwise, partly sunny, with a high near 65. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 20%.
Tuesday Night
Mostly cloudy, with a low around 38. West wind around 5 mph becoming calm in the evening.
Wednesday
A chance of rain between 11am and 3pm, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 66. Calm wind becoming west northwest around 5 mph in the afternoon. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 9pm, then rain likely between 9pm and midnight. Mostly cloudy, with a low around 38. North northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 41.
Friday
Mostly sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 44.
Memorial Day
Mostly sunny, with a high near 69.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE St. Regis MT
 47.28°N 115.05°W (Elev. 3232 ft)
12:21 am MDT May 19, 2026
1am MDT May 19, 2026-6pm MDT May 25, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database