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

Lost Trail Pass (ITD87)

Lat: 45.69302°NLon: 113.94835°WElev: 7090.0ft.

NA

38°F

3°C

Humidity 39%
Wind Speed W 3 MPH
Barometer NA
Dewpoint 15°F (-9°C)
Visibility 1.24 mi
Last update 10 Apr 01:45 AM MDT
Extended Forecast for

Lost Trail Pass MT

  • Overnight

    Overnight: Partly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Partly Cloudy

  • Friday

    Friday: Rain likely, mainly after 5pm. Snow level rising to 9500 feet in the afternoon. Mostly sunny, with a high near 58. Light and variable wind becoming south 10 to 15 mph in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 70%.

    High: 58 °F

    Mostly Sunny
    then Rain
    Likely

  • Friday Night

    Friday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 36. West southwest wind 6 to 16 mph becoming southeast in the evening. Winds could gust as high as 25 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain, then showers and possibly a thunderstorm after noon. High near 52. South wind 6 to 14 mph becoming west southwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 52 °F

    Chance Rain
    then Showers

  • Saturday Night

    Saturday Night: A chance of rain, mixing with snow after 9pm, then gradually ending. Snow level 8000 feet lowering to 7100 feet after midnight . Mostly cloudy, with a low around 32. West southwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 32 °F

    Chance
    Rain/Snow
    then Partly
    Cloudy

  • Sunday

    Sunday: A slight chance of snow before noon, then rain and snow between noon and 3pm, then rain showers after 3pm. Some thunder is also possible. Snow level rising to 7600 feet in the afternoon. High near 49. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 49 °F

    Slight Chance
    Snow then
    Rain/Snow

  • Sunday Night

    Sunday Night: Rain before 9pm, then rain and snow between 9pm and midnight, then snow likely after midnight. Snow level 7600 feet lowering to 7100 feet after midnight . Low around 33. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Rain/Snow
    then Snow
    Likely

  • Monday

    Monday: Snow. Cloudy, with a high near 40.

    High: 40 °F

    Snow

  • Monday Night

    Monday Night: A chance of snow. Mostly cloudy, with a low around 29.

    Low: 29 °F

    Chance Snow

Detailed Forecast

Overnight
Partly cloudy, with a low around 30. Calm wind.
Friday
Rain likely, mainly after 5pm. Snow level rising to 9500 feet in the afternoon. Mostly sunny, with a high near 58. Light and variable wind becoming south 10 to 15 mph in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 36. West southwest wind 6 to 16 mph becoming southeast in the evening. Winds could gust as high as 25 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A chance of rain, then showers and possibly a thunderstorm after noon. High near 52. South wind 6 to 14 mph becoming west southwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of rain, mixing with snow after 9pm, then gradually ending. Snow level 8000 feet lowering to 7100 feet after midnight . Mostly cloudy, with a low around 32. West southwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Sunday
A slight chance of snow before noon, then rain and snow between noon and 3pm, then rain showers after 3pm. Some thunder is also possible. Snow level rising to 7600 feet in the afternoon. High near 49. Chance of precipitation is 80%. Little or no snow accumulation expected.
Sunday Night
Rain before 9pm, then rain and snow between 9pm and midnight, then snow likely after midnight. Snow level 7600 feet lowering to 7100 feet after midnight . Low around 33. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Monday
Snow. Cloudy, with a high near 40.
Monday Night
A chance of snow. Mostly cloudy, with a low around 29.
Tuesday
A chance of snow, mainly before noon. Partly sunny, with a high near 42.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 29.
Wednesday
Snow. Mostly cloudy, with a high near 38.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 23.
Thursday
A chance of snow. Partly sunny, with a high near 37.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lost Trail Pass MT
 45.68°N 113.94°W (Elev. 7077 ft)
Last Update:
2:01 am MDT Apr 10, 2026
Forecast Valid:
2am MDT Apr 10, 2026-6pm MDT Apr 16, 2026
 
Forecast Discussion
 
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Additional Resources

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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