Happy Isles Weather Forecast

    • 42
    • 62

    Becoming Sunny

    • 45
    • 66

    Mostly Sunny

    • 48
    • 69

    Mostly Sunny

    • 49
    • 72

    Mostly Sunny

    • 49
    • 73

    Sunny

    • 48
    • 73

    Sunny

    • 45
    • 71

    Mostly Sunny

Today 7 Dec Yosemite Valley

Mostly sunny. Highs 54 to 62. East Winds up to 5 Mph shifting to the southwest in the afternoon.

Tonight 7 Dec Yosemite Valley

Partly cloudy in the evening then becoming clear. Lows 40 to 48. Northeast Winds up to 5 Mph.

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Happy Isles Temperature Statistics

December Temperature

Mammoth Yosemite Airport (39.8 miles)

  • Lowest 4 December, 2025

    10.4 °F

  • Average December

    33.2 °F

  • Highest 2 December, 2025

    59 °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 °F

  • Average High 2020–2025

    60.8 °F
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