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

Sieben I-15 MP 216 (MTSBN)

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

NA

53°F

12°C

Humidity 93%
Wind Speed SSE 1 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Last update 27 May 03:00 AM MDT
Extended Forecast for

2 Miles WNW Marysville MT

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 56. West southwest wind around 5 mph.

    Low: 56 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 73. Light and variable wind becoming east 5 to 9 mph in the afternoon.

    High: 73 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and midnight. Partly cloudy, with a low around 56. Northeast wind 5 to 9 mph becoming calm after midnight. Chance of precipitation is 40%.

    Low: 56 °F

    Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 78. Light and variable wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    High: 78 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before midnight. Partly cloudy, with a low around 57. East wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph.

    Low: 57 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75. West wind 5 to 9 mph.

    High: 75 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Northeast wind around 11 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 60%.

    Low: 50 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after noon. Cloudy, with a high near 54. West wind 8 to 10 mph, with gusts as high as 18 mph.

    High: 54 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before midnight, then rain likely after midnight. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Showers

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 56. West southwest wind around 5 mph.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 73. Light and variable wind becoming east 5 to 9 mph in the afternoon.
Wednesday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and midnight. Partly cloudy, with a low around 56. Northeast wind 5 to 9 mph becoming calm after midnight. Chance of precipitation is 40%.
Thursday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 78. Light and variable wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Thursday Night
A 30 percent chance of showers before midnight. Partly cloudy, with a low around 57. East wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph.
Friday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75. West wind 5 to 9 mph.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Northeast wind around 11 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 60%.
Saturday
Showers likely, then showers and possibly a thunderstorm after noon. Cloudy, with a high near 54. West wind 8 to 10 mph, with gusts as high as 18 mph.
Saturday Night
Showers and possibly a thunderstorm before midnight, then rain likely after midnight. Mostly cloudy, with a low around 44.
Sunday
A chance of rain before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 54.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 42.
Monday
A chance of rain and thunderstorms. Partly sunny, with a high near 57.
Monday Night
A slight chance of rain. Partly cloudy, with a low around 45.
Tuesday
A slight chance of rain and thunderstorms. Mostly sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Marysville MT
 46.77°N 112.33°W (Elev. 6099 ft)
Last Update:
12:31 am MDT May 27, 2026
Forecast Valid:
3am MDT May 27, 2026-6pm MDT Jun 2, 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