Merriam Lake Weather Forecast

    • 34
    • 56

    Breezy

    • 29
    • 44

    Chance Snow Showers

    • 36
    • 52

    Mostly Sunny

    • 41
    • 58

    Partly Sunny

    • 42
    • 58

    Partly Sunny

    • 40
    • 55

    Slight Chance Rain

Today 6 Sep Lost River Range

Sunny, breezy. Highs 68 to 78.

Tonight 6 Sep Lost River Range

A slight chance of Showers and Thunderstorms in the evening. Then rain Showers likely and a slight chance of Thunderstorms after midnight. Lows 42 to 49.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Merriam Lake Temperature Statistics

September Temperature

Hailey, Friedman Memorial Airport (50.3 miles)

  • Lowest 3 September, 2026

    42.8 °F

  • Average September

    55.6 °F

  • Highest 1 September, 2026

    77 °F

Climate (2021–2026)

Hailey, Friedman Memorial Airport (50.3 miles)

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  • Average Low 2021–2026

    34.8 °F

  • Average 2021–2026

    43.3 °F

  • Average High 2021–2026

    56.7 °F
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