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

Salmon, Lemhi County Airport (KSMN)

Lat: 45.11667°NLon: 113.88333°WElev: 4045.0ft.

Partly Cloudy

72°F

22°C

Humidity 26%
Wind Speed S 11 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 01 Oct 03:56 PM MDT
Extended Forecast for

4 Miles S Salmon ID

  • Tonight

    Tonight: Partly cloudy, with a low around 42. Southwest wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 36 mph.

    Low: 42 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a high near 68. Calm wind becoming west around 6 mph in the afternoon.

    High: 68 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers after 9pm. Low around 45. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 45 °F

    Chance
    Showers then
    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after 3pm. High near 61. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 61 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 40. North northwest wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 40 °F

    Showers
    Likely

  • Saturday

    Saturday: A 40 percent chance of showers. Mostly cloudy, with a high near 56.

    High: 56 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers. Partly sunny, with a high near 56.

    High: 56 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Widespread frost, mainly after 1am. Otherwise, partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy
    then Frost

Detailed Forecast

Tonight
Partly cloudy, with a low around 42. Southwest wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 36 mph.
Thursday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a high near 68. Calm wind becoming west around 6 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms, then showers after 9pm. Low around 45. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Showers, with thunderstorms also possible after 3pm. High near 61. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 40. North northwest wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 40 percent chance of showers. Mostly cloudy, with a high near 56.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 34.
Sunday
A slight chance of showers. Partly sunny, with a high near 56.
Sunday Night
Widespread frost, mainly after 1am. Otherwise, partly cloudy, with a low around 28.
Monday
Patchy fog before 9am. Widespread frost, mainly before 11am. Otherwise, sunny, with a high near 58.
Monday Night
Widespread frost. Otherwise, mostly clear, with a low around 28.
Tuesday
Patchy fog. Widespread frost. Otherwise, sunny, with a high near 61.
Tuesday Night
Widespread frost. Otherwise, mostly clear, with a low around 32.
Wednesday
Widespread frost. Otherwise, sunny, with a high near 64.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Salmon ID
 45.12°N 113.89°W (Elev. 4034 ft)
Last Update:
2:31 pm MDT Oct 1, 2025
Forecast Valid:
4pm MDT Oct 1, 2025-6pm MDT Oct 8, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation