Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Salmon, Lemhi County Airport (KSMN)

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

Clear

68°F

20°C

Humidity 45%
Wind Speed N 0 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 18 Aug 10:15 PM MDT
Extended Forecast for

20 Miles S Salmon ID

  • Tonight

    Tonight: Mostly clear, with a low around 54. North wind around 6 mph becoming calm  in the evening.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. West northwest wind around 6 mph becoming calm  in the evening.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 94. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 94 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 61. West wind 5 to 8 mph becoming calm  after midnight.

    Low: 61 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of rain before midnight.  Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance Rain
    then Mostly
    Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms after noon.  Partly sunny, with a high near 86.

    High: 86 °F

    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 57.

    Low: 57 °F

    Slight Chance
    T-storms then
    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 54. North wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 88. Calm wind becoming west 5 to 8 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 57. West northwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 94. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 61. West wind 5 to 8 mph becoming calm after midnight.
Friday
Mostly sunny, with a high near 92.
Friday Night
A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 62.
Saturday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 86.
Saturday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 57.
Sunday
Sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 56.
Monday
A slight chance of showers and thunderstorms. Sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
20 Miles S Salmon ID
 44.88°N 113.96°W (Elev. 4600 ft)
2:00 pm MDT Aug 18, 2026
10pm MDT Aug 18, 2026-6pm MDT Aug 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database