Summit Reservoir Weather Forecast

    • 6
    • 18

    Partly Sunny

    • 14
    • 22

    Mostly Cloudy

    • 19
    • 29

    Mostly Sunny

    • 26
    • 33

    Snow

    • 19
    • 33

    Snow

    • 18
    • 30

    Chance Snow

Today 20 Feb Lost River Range

Mostly sunny. Highs 18 to 28. Wind chill Readings 15 below to 25 below zero.

Tonight 20 Feb Lost River Range

Partly cloudy. Lows 4 to 13. Wind chill Readings 7 below to 17 below zero.

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Summit Reservoir Temperature Statistics

February Temperature

Salmon, Lemhi County Airport (58.4 miles)

  • Lowest 1 February, 2026

    19 °F

  • Average February

    34 °F

  • Highest 16 February, 2026

    55 °F

Climate (2021–Present)

Salmon, Lemhi County Airport (58.4 miles)

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  • Average Low 2021–2026

    32.9 °F

  • Average 2021–2026

    45.9 °F

  • Average High 2021–2026

    58.8 °F
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