Thousand Island Lake Weather Forecast

    • 31
    • 44

    Breezy

    • 31
    • 44

    Snow Likely

    • 30
    • 40

    Snow Likely

    • 29
    • 32

    Blizzard

    • 26
    • 32

    Snow Likely

    • 24
    • 30

    Blizzard

Today 18 Dec Upper San Joaquin River

Not as cool. Mostly sunny. Highs 45 to 61. West Winds up to 10 Mph with Gusts to around 25 Mph.

Tonight 18 Dec Upper San Joaquin River

Mostly clear. Lows 29 to 39. Southwest Winds 5 to 15 Mph. Gusts up to 35 Mph increasing to 45 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Thousand Island Lake Temperature Statistics

December Temperature

Mammoth Yosemite Airport (19.3 miles)

  • Lowest 4 December, 2025

    10.4 °F

  • Average December

    35.2 °F

  • Highest 11 December, 2025

    66.2 °F

Climate (2020–Present)

Mammoth Yosemite Airport (19.3 miles)

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  • Average Low 2020–2025

    29.6 °F

  • Average 2020–2025

    46 °F

  • Average High 2020–2025

    60.9 °F
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