Big Lost Lake Weather Forecast

    • 45
    • 56

    Slight Chance Thunderstorms

    • 47
    • 62

    Mostly Sunny

    • 49
    • 64

    Mostly Sunny

    • 50
    • 65

    Partly Sunny

    • 49
    • 65

    Mostly Sunny

    • 50
    • 65

    Mostly Sunny

Today 22 Jul Sun Valley Region

Mostly cloudy. A slight chance of rain Showers in the morning. Then a slight chance of Showers and Thunderstorms in the afternoon. Some Thunderstorms may produce gusty Winds in the afternoon. Highs 68 to 78.

Tonight 22 Jul Sun Valley Region

Partly cloudy. Lows 43 to 53.

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Big Lost Lake Temperature Statistics

July Temperature

Hailey, Friedman Memorial Airport (24.2 miles)

  • Lowest 6 July, 2025

    44.6 °F

  • Average July

    66 °F

  • Highest 1 July, 2025

    93.2 °F

Climate (2020–Present)

Hailey, Friedman Memorial Airport (24.2 miles)

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  • Average Low 2020–2025

    33.9 °F

  • Average 2020–2025

    42.2 °F

  • Average High 2020–2025

    56 °F
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