Happy Isles Weather Forecast

    • 57
    • 83

    Sunny

    • 54
    • 79

    Mostly Sunny

    • 54
    • 81

    Sunny

    • 54
    • 80

    Mostly Sunny

    • 56
    • 82

    Mostly Sunny

    • 58
    • 84

    Mostly Sunny

Today 12 Sep Yosemite Valley

Sunny. Highs 74 to 86. Southeast Winds 5 to 10 Mph shifting to the southwest 10 to 15 Mph in the afternoon.

Tonight 12 Sep Yosemite Valley

Clear. Lows 55 to 61. Northeast Winds up to 10 Mph.

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Happy Isles Temperature Statistics

September Temperature

Mammoth Yosemite Airport (39.8 miles)

  • Lowest 5 September, 2026

    33.8 °F

  • Average September

    59.6 °F

  • Highest 9 September, 2026

    84.2 °F

Climate (2021–2026)

Mammoth Yosemite Airport (39.8 miles)

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  • Average Low 2021–2026

    29.4 °F

  • Average 2021–2026

    45.7 °F

  • Average High 2021–2026

    60.5 °F
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