Summit Reservoir Weather Forecast

    • 59
    • 78

    Chance Thunderstorms

    • 56
    • 75

    Rain Likely

    • 58
    • 77

    Mostly Sunny

    • 59
    • 81

    Mostly Sunny

    • 57
    • 81

    Mostly Sunny

    • 57
    • 81

    Mostly Sunny

Today 21 Jul Lost River Range

Partly sunny. A slight chance of rain in the morning. Then a chance of Showers and Thunderstorms in the afternoon. Highs 81 to 91.

Tonight 21 Jul Lost River Range

Mostly cloudy. A slight chance of Showers and Thunderstorms in the evening. Then a slight chance of rain after midnight. Lows 60 to 67.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Summit Reservoir Temperature Statistics

July Temperature

Salmon, Lemhi County Airport (58.4 miles)

  • Lowest 2 July, 2026

    44.1 °F

  • Average July

    70.2 °F

  • Highest 11 July, 2026

    97 °F

Climate (2021–2026)

Salmon, Lemhi County Airport (58.4 miles)

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  • Average Low 2021–2026

    33 °F

  • Average 2021–2026

    46 °F

  • Average High 2021–2026

    59 °F
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