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

Sieben I-15 MP 216 (MTSBN)

Lat: 46.88748267°NLon: 112.1111196°WElev: 4199.0ft.

NA

44°F

7°C

Humidity 64%
Wind Speed SSW 4 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Wind Chill42°F (6°C)
Last update 20 Mar 06:45 AM MDT
Extended Forecast for

Marysville MT

High Wind Warning until March 21, 12:00pm
Click here for hazard details and duration
High Wind Warning
  •  
    High Wind Warning until March 21, 12:00pm

    NOW until 12:00pm Sat

    High Wind Warning

  • Today

    High: 65 °F

    Sunny and
    Windy

  • Tonight

    Tonight: Mostly clear, with a low around 46. Breezy, with a west southwest wind 17 to 26 mph, with gusts as high as 49 mph.

    Low: 46 °F

    Mostly Clear
    and Breezy
    then Partly
    Cloudy

  • Saturday

    Saturday: Rain likely, mainly between noon and 2pm. Partly sunny, with a high near 59. Breezy, with a west wind 17 to 22 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 47 mph. Chance of precipitation is 70%.

    High: 59 °F

    Slight Chance
    Rain then
    Rain Likely
    and Breezy

  • Saturday Night

    Saturday Night: A slight chance of rain and snow before 9pm, then a slight chance of snow between 9pm and midnight. Mostly clear, with a low around 32. Breezy, with a west wind 23 to 28 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 47 mph. Chance of precipitation is 20%.

    Low: 32 °F

    Slight Chance
    Rain/Snow and
    Breezy then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 45. West southwest wind 13 to 18 mph, with gusts as high as 33 mph.

    High: 45 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 31. West southwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 34 mph.

    Low: 31 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 50. West southwest wind 7 to 13 mph, with gusts as high as 25 mph.

    High: 50 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 34. West southwest wind 6 to 13 mph, with gusts as high as 24 mph.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 65. Windy, with a southwest wind 15 to 20 mph increasing to 26 to 31 mph in the afternoon. Winds could gust as high as 55 mph.
Tonight
Mostly clear, with a low around 46. Breezy, with a west southwest wind 17 to 26 mph, with gusts as high as 49 mph.
Saturday
Rain likely, mainly between noon and 2pm. Partly sunny, with a high near 59. Breezy, with a west wind 17 to 22 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 47 mph. Chance of precipitation is 70%.
Saturday Night
A slight chance of rain and snow before 9pm, then a slight chance of snow between 9pm and midnight. Mostly clear, with a low around 32. Breezy, with a west wind 23 to 28 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 47 mph. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 45. West southwest wind 13 to 18 mph, with gusts as high as 33 mph.
Sunday Night
Partly cloudy, with a low around 31. West southwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 34 mph.
Monday
Partly sunny, with a high near 50. West southwest wind 7 to 13 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 34. West southwest wind 6 to 13 mph, with gusts as high as 24 mph.
Tuesday
A slight chance of snow before noon, then a chance of rain. Partly sunny, with a high near 55.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 43.
Wednesday
A chance of rain. Partly sunny, with a high near 53. Breezy.
Wednesday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Breezy.
Thursday
A chance of snow. Mostly sunny, with a high near 40. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marysville MT
 46.75°N 112.29°W (Elev. 5456 ft)
Last Update:
4:01 am MDT Mar 20, 2026
Forecast Valid:
7am MDT Mar 20, 2026-6pm MDT Mar 26, 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