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

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

HEBGEN LAKE (HBRM8)

Lat: 44.66597°NLon: 111.09911°WElev: 6700.0ft.

NA

47°F

8°C

Humidity 100%
Wind Speed SW 0 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 19 Sep 02:39 AM MDT
Extended Forecast for

West Yellowstone MT

  • Overnight

    Overnight: A 50 percent chance of showers and thunderstorms. Areas of fog. Otherwise, mostly cloudy, with a steady temperature around 41. Calm wind.

    Low: 41 °F

    Chance
    Showers and
    Areas Fog

  • Saturday

    Saturday: Rain before noon, then a chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Areas of fog before noon. High near 57. Light and variable wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 57 °F

    Showers and
    Areas Fog

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 9pm, then a slight chance of rain between 9pm and 4am. Areas of fog after 9pm. Otherwise, mostly cloudy, with a low around 30. Calm wind. Chance of precipitation is 40%.

    Low: 30 °F

    Chance
    Showers and
    Areas Fog

  • Sunday

    Sunday: Areas of fog before noon. Otherwise, partly sunny, with a high near 61. Calm wind.

    High: 61 °F

    Areas Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 28. Calm wind.

    Low: 28 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 68. Light and variable wind.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 30. Calm wind.

    Low: 30 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 70. Light and variable wind.

    High: 70 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 50 percent chance of showers and thunderstorms. Areas of fog. Otherwise, mostly cloudy, with a steady temperature around 41. Calm wind.
Saturday
Rain before noon, then a chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Areas of fog before noon. High near 57. Light and variable wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms before 9pm, then a slight chance of rain between 9pm and 4am. Areas of fog after 9pm. Otherwise, mostly cloudy, with a low around 30. Calm wind. Chance of precipitation is 40%.
Sunday
Areas of fog before noon. Otherwise, partly sunny, with a high near 61. Calm wind.
Sunday Night
Partly cloudy, with a low around 28. Calm wind.
Monday
Sunny, with a high near 68. Light and variable wind.
Monday Night
Mostly clear, with a low around 30. Calm wind.
Tuesday
Mostly sunny, with a high near 70. Light and variable wind.
Tuesday Night
Partly cloudy, with a low around 32.
Wednesday
Mostly sunny, with a high near 69.
Wednesday Night
Mostly clear, with a low around 32.
Thursday
Sunny, with a high near 72.
Thursday Night
Mostly clear, with a low around 33.
Friday
Mostly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
West Yellowstone MT
 44.67°N 111.09°W (Elev. 6686 ft)
Last Update:
12:31 am MDT Sep 19, 2026
Forecast Valid:
3am MDT Sep 19, 2026-6pm MDT Sep 25, 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