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

54°F

12°C

Humidity 51%
Wind Speed W 13 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 21 Mar 03:15 AM MDT
Extended Forecast for

Marysville MT

  • Overnight

    Overnight: Mostly clear, with a low around 43. West wind around 14 mph, with gusts as high as 23 mph.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: Rain likely before 5pm, then a chance of rain and snow.  Partly sunny, with a high near 50. Breezy, with a west wind 11 to 16 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 43 mph.  Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 50 °F

    Chance Rain
    then
    Rain/Snow
    Likely and
    Breezy

  • Saturday Night

    Saturday Night: A slight chance of rain and snow before 7pm.  Mostly clear, with a low around 30. Breezy, with a west wind 20 to 25 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 43 mph.  Chance of precipitation is 20%.

    Low: 30 °F

    Slight Chance
    Rain/Snow 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.

    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.

    Low: 40 °F

    Chance Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 43. West wind around 14 mph, with gusts as high as 23 mph.
Saturday
Rain likely before 5pm, then a chance of rain and snow. Partly sunny, with a high near 50. Breezy, with a west wind 11 to 16 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Saturday Night
A slight chance of rain and snow before 7pm. Mostly clear, with a low around 30. Breezy, with a west wind 20 to 25 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 43 mph. Chance of precipitation is 20%.
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.
Tuesday Night
A chance of rain, mainly before midnight. Mostly cloudy, with a low around 40.
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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ABOUT THIS FORECAST

 
Point Forecast:
Marysville MT
 46.75°N 112.29°W (Elev. 5456 ft)
2:52 am MDT Mar 21, 2026
3am MDT Mar 21, 2026-6pm MDT Mar 27, 2026
 
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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