Three Island Lake Weather Forecast

    • 34
    • 46

    Partly Sunny

    • 32
    • 45

    Rain/Snow Likely

    • 30
    • 45

    Chance Rain/Snow

    • 24
    • 41

    Breezy

    • 20
    • 31

    Snow Showers Likely

    • 23
    • 31

    Chance Snow Showers

    • 29
    • 40

    Mostly Sunny

Today 23 May Upper San Joaquin River

Sunny. Southwest Winds up to 5 Mph increasing to 5 to 15 Mph in the afternoon.

Tonight 23 May Upper San Joaquin River

Mostly clear. Lows 36 to 48. West Winds up to 10 Mph with Gusts to around 25 Mph shifting to the east after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Three Island Lake Temperature Statistics

May Temperature

Mammoth Yosemite Airport (23 miles)

  • Lowest 18 May, 2026

    19.4 °F

  • Average May

    53 °F

  • Highest 10 May, 2026

    78.8 °F

Climate (2021–Present)

Mammoth Yosemite Airport (23 miles)

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  • Average Low 2021–2026

    29.6 °F

  • Average 2021–2026

    45.9 °F

  • Average High 2021–2026

    60.7 °F
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