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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

ST. REGIS (STGM8)

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

NA

40°F

4°C

Humidity 89%
Wind Speed NW 0 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 21 Mar 09:02 PM MDT
Extended Forecast for

St. Regis MT

Flood Watch March 21, 09:25pm until March 22, 12:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch March 21, 09:25pm until March 22, 12:00pm

    NOW until 12:00pm Sun

    Flood Watch

  • Tonight

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 51. Calm wind.

    High: 51 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 28. Calm wind.

    Low: 28 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 59. Calm wind.

    High: 59 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Rain, mainly after noon. High near 53. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °F

    Chance Rain
    then Rain

  • Tuesday Night

    Tuesday Night: Rain, mainly before midnight. Low around 37. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 37 °F

    Rain then
    Chance Rain

  • Wednesday

    Wednesday: A chance of rain. Partly sunny, with a high near 53.

    High: 53 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 29. Calm wind.
Sunday
Sunny, with a high near 51. Calm wind.
Sunday Night
Partly cloudy, with a low around 28. Calm wind.
Monday
Mostly sunny, with a high near 59. Calm wind.
Monday Night
Mostly cloudy, with a low around 36. Calm wind.
Tuesday
Rain, mainly after noon. High near 53. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain, mainly before midnight. Low around 37. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A chance of rain. Partly sunny, with a high near 53.
Wednesday Night
A chance of rain before midnight, then a chance of snow. Snow level 4900 feet lowering to 3100 feet after midnight . Mostly cloudy, with a low around 29.
Thursday
Mostly sunny, with a high near 48.
Thursday Night
Mostly clear, with a low around 25.
Friday
Sunny, with a high near 54.
Friday Night
Mostly clear, with a low around 27.
Saturday
Sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
St. Regis MT
 47.29°N 115.12°W (Elev. 2838 ft)
Last Update:
2:01 pm MDT Mar 21, 2026
Forecast Valid:
9pm MDT Mar 21, 2026-6pm MDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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