Three Island Lake Weather Forecast

    • 23
    • 37

    Becoming Sunny

    • 21
    • 35

    Partly Sunny

    • 21
    • 35

    Sunny

    • 22
    • 36

    Sunny

    • 22
    • 37

    Sunny

    • 21
    • 36

    Partly Sunny

Today 31 Jan Upper San Joaquin River

Mostly sunny. Highs 41 to 57. Northeast Winds up to 10 Mph shifting to the southwest in the afternoon.

Tonight 31 Jan Upper San Joaquin River

Mostly clear. Lows 26 to 38. Southeast Winds up to 10 Mph.

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  • Temperature Real-Time

Three Island Lake Temperature Statistics

January Temperature

Mammoth Yosemite Airport (23 miles)

  • Lowest 10 January, 2026

    -2.2 °F

  • Average January

    22.5 °F

  • Highest 22 January, 2026

    41 °F

Climate (2021–Present)

Mammoth Yosemite Airport (23 miles)

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  • Average Low 2021–2026

    29.5 °F

  • Average 2021–2026

    45.8 °F

  • Average High 2021–2026

    60.7 °F
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