Lemhi Weather Forecast

    • 35
    • 57

    Partly Sunny

    • 33
    • 56

    Chance Rain Showers

    • 40
    • 63

    Slight Chance Rain

    • 39
    • 65

    Slight Chance Rain

    • 42
    • 68

    Partly Sunny

    • 41
    • 67

    Slight Chance Rain

Today 19 May Eastern Lemhi County

Partly cloudy. Highs in the 50s. Northwest Winds to 15 Mph in the afternoon.

Tonight 19 May Eastern Lemhi County

Mostly cloudy with a chance of rain. A chance of snow after midnight. Chance of precipitation 40 percent. Lows in the 30s. West Winds to 15 Mph.

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Lemhi Temperature Statistics

May Temperature

Salmon, Lemhi County Airport (20.5 miles)

  • Lowest 1 May, 2025

    29.8 °F

  • Average May

    54.7 °F

  • Highest 10 May, 2025

    86 °F

Climate (2020–Present)

Salmon, Lemhi County Airport (20.5 miles)

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  • Average Low 2020–2025

    32.2 °F

  • Average 2020–2025

    45.2 °F

  • Average High 2020–2025

    58 °F
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