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 >

Current conditions at

Sieben I-15 MP 216 (MTSBN)

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

NA

51°F

11°C

Humidity 61%
Wind Speed ESE 13 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 21 Mar 09:15 AM MDT
Extended Forecast for

Marysville MT

  • Today

    Today: A chance of rain, possibly mixing with snow after 2pm, then gradually ending. Mostly cloudy, then gradually becoming sunny, with a high near 50. Breezy, with a west wind 10 to 15 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 50 °F

    Chance Rain
    then Chance
    Rain/Snow and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 30. Breezy, with a west wind 23 to 28 mph decreasing to 14 to 19 mph in the evening. Winds could gust as high as 43 mph.

    Low: 30 °F

    Mostly Clear
    and Breezy
    then Clear

  • Sunday

    Sunday: Sunny, with a high near 47. West wind 14 to 20 mph, with gusts as high as 39 mph.

    High: 47 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 30. West southwest wind 16 to 21 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 36 mph.

    Low: 30 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 52. West southwest wind 6 to 13 mph, with gusts as high as 25 mph.

    High: 52 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 35. West southwest wind 6 to 14 mph, with gusts as high as 24 mph.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of snow before noon, then a chance of rain and snow. Mostly cloudy, with a high near 53. West southwest wind 6 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 53 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A chance of rain, mainly before midnight. Mostly cloudy, with a low around 40. West southwest wind around 17 mph, with gusts as high as 31 mph.

    Low: 40 °F

    Chance Rain

  • Wednesday

    Wednesday: A chance of rain. Partly sunny, with a high near 50. Breezy.

    High: 50 °F

    Chance Rain
    and Breezy

Detailed Forecast

Today
A chance of rain, possibly mixing with snow after 2pm, then gradually ending. Mostly cloudy, then gradually becoming sunny, with a high near 50. Breezy, with a west wind 10 to 15 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Tonight
Mostly clear, with a low around 30. Breezy, with a west wind 23 to 28 mph decreasing to 14 to 19 mph in the evening. Winds could gust as high as 43 mph.
Sunday
Sunny, with a high near 47. West wind 14 to 20 mph, with gusts as high as 39 mph.
Sunday Night
Partly cloudy, with a low around 30. West southwest wind 16 to 21 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 36 mph.
Monday
Mostly sunny, with a high near 52. West southwest wind 6 to 13 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 35. West southwest wind 6 to 14 mph, with gusts as high as 24 mph.
Tuesday
A chance of snow before noon, then a chance of rain and snow. Mostly cloudy, with a high near 53. West southwest wind 6 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Tuesday Night
A chance of rain, mainly before midnight. Mostly cloudy, with a low around 40. West southwest wind around 17 mph, with gusts as high as 31 mph.
Wednesday
A chance of rain. Partly sunny, with a high near 50. Breezy.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 28. Breezy.
Thursday
A slight chance of snow. Mostly sunny, with a high near 40. Breezy.
Thursday Night
Partly cloudy, with a low around 26. Breezy.
Friday
Sunny, with a high near 47.
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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:
8:22 am MDT Mar 21, 2026
Forecast Valid:
9am MDT Mar 21, 2026-6pm MDT Mar 27, 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