Salmon Weather Forecast

    • 36
    • 68

    Mostly Cloudy

    • 35
    • 68

    Partly Sunny

    • 39
    • 75

    Partly Sunny

    • 42
    • 81

    Partly Sunny

    • 44
    • 86

    Partly Sunny

    • 42
    • 85

    Breezy

Today 20 May Eastern Lemhi County

Mostly cloudy. Highs in the mid 50s to lower 60s. Northwest Winds to 15 Mph in the afternoon.

Tonight 20 May Eastern Lemhi County

Rain likely and a slight chance of Thunderstorms in the Evening, then a chance of rain and snow after midnight. Chance of precipitation 70 percent. No snow accumulation. Lows in the 30s. Northwest Winds to 15 Mph.

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Salmon Temperature Statistics

May Temperature

Salmon, Lemhi County Airport (3.7 miles)

  • Lowest 17 May, 2026

    28 °F

  • Average May

    56.3 °F

  • Highest 12 May, 2026

    84.9 °F

Climate (2021–Present)

Salmon, Lemhi County Airport (3.7 miles)

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  • Average Low 2021–2026

    33.1 °F

  • Average 2021–2026

    46.1 °F

  • Average High 2021–2026

    59.1 °F
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