Dangerous Heat and Heavy Rainfall into the Weekend
Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >
Current conditions at
Sieben I-15 MP 216 (MTSBN)
Lat: 46.88748267°NLon: 112.1111196°WElev: 4199.0ft.NA
44°F
7°C
| Humidity | 100% |
| Wind Speed | W 2 MPH |
| Barometer | NA |
| Dewpoint | 44°F (7°C) |
| Visibility | NA |
| Last update | 20 Sep 08:30 AM MDT |
Extended Forecast for
6 Miles WNW Marysville MT
Today
High: 68 °F
Sunny
Tonight
Low: 47 °F
Mostly Clear
Monday
High: 73 °F
Sunny
Monday Night
Low: 49 °F
Mostly Clear
Tuesday
High: 73 °F
Sunny
Tuesday Night
Low: 51 °F
Partly Cloudy
Wednesday
High: 71 °F
Mostly Sunny
Wednesday Night
Low: 49 °F
Partly Cloudy
Thursday
High: 73 °F
Mostly Sunny
Detailed Forecast
Today
Sunny, with a high near 68. Calm wind becoming east southeast around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 47. East southeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 73. Calm wind becoming south southwest around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 49. Light southwest wind.
Tuesday
Sunny, with a high near 73. Calm wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 51. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 71. Light west southwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Wednesday Night
Partly cloudy, with a low around 49. West southwest wind 3 to 8 mph. Winds could gust as high as 18 mph.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Partly cloudy, with a low around 52.
Friday
Mostly sunny, with a high near 74.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 61.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
6 Miles WNW Marysville MT
46.78°N 112.42°W (Elev. 4905 ft)
46.78°N 112.42°W (Elev. 4905 ft)
3:42 am MDT Sep 20, 2026
8am MDT Sep 20, 2026-6pm MDT Sep 26, 2026
Additional Resources
Radar & Satellite Image
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