Three Island Lake Weather Forecast

    • 33
    • 47

    Mostly Sunny

    • 32
    • 48

    Mostly Sunny

    • 31
    • 47

    Mostly Sunny

    • 29
    • 41

    Partly Sunny

    • 30
    • 40

    Mostly Sunny

    • 23
    • 35

    Chance Snow

Today 31 Oct Upper San Joaquin River

Sunny. Highs 52 to 66. Northwest Winds up to 5 Mph shifting to the west in the afternoon.

Tonight 31 Oct Upper San Joaquin River

Mostly clear. Lows 36 to 48. Northeast Winds up to 10 Mph shifting to the southeast after midnight.

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Three Island Lake Temperature Statistics

October Temperature

Mammoth Yosemite Airport (23 miles)

  • Lowest 12 October, 2025

    19.4 °F

  • Average October

    46.2 °F

  • Highest 19 October, 2025

    71.6 °F

Climate (2020–Present)

Mammoth Yosemite Airport (23 miles)

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  • Average Low 2020–2025

    29.6 °F

  • Average 2020–2025

    46 °F

  • Average High 2020–2025

    60.8 °F
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