Happy Isles Weather Forecast

    • 56
    • 85

    Slight Chance Thunderstorms

    • 58
    • 84

    Mostly Sunny

    • 60
    • 87

    Mostly Sunny

    • 59
    • 88

    Mostly Sunny

    • 58
    • 88

    Mostly Sunny

    • 57
    • 86

    Mostly Sunny

Today 28 Aug Yosemite Valley

Sunny. A 20 percent chance of Thunderstorms in the afternoon. Highs 76 to 88. East Winds up to 10 Mph shifting to the west in the afternoon.

Tonight 28 Aug Yosemite Valley

Mostly clear. Lows 56 to 64. North Winds 5 to 10 Mph shifting to the northeast after midnight.

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Happy Isles Temperature Statistics

August Temperature

Mammoth Yosemite Airport (39.8 miles)

  • Lowest 5 August, 2025

    39.2 °F

  • Average August

    66.1 °F

  • Highest 10 August, 2025

    87.8 °F

Climate (2020–Present)

Mammoth Yosemite Airport (39.8 miles)

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  • Average Low 2020–2025

    29.7 °F

  • Average 2020–2025

    46.3 °F

  • Average High 2020–2025

    61.1 °F
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