Grinnell Lake Weather Forecast

    • 35
    • 57

    Becoming Sunny

    • 36
    • 58

    Mostly Sunny

    • 36
    • 57

    Partly Sunny

    • 27
    • 49

    Breezy

    • 29
    • 45

    Mostly Sunny

    • 30
    • 47

    Mostly Sunny

    • 29
    • 49

    Mostly Sunny

Today 10 May Upper San Joaquin River

Warmer, sunny. Highs 57 to 77. Southeast Winds up to 10 Mph shifting to the southwest in the afternoon. Gusts up to 30 Mph.

Tonight 10 May Upper San Joaquin River

Mostly clear. Lows 39 to 53. South Winds up to 10 Mph. Gusts up to 30 Mph in the evening.

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  • Temperature Real-Time

Grinnell Lake Temperature Statistics

May Temperature

Mammoth Yosemite Airport (10.6 miles)

  • Lowest 1 May, 2026

    30.2 °F

  • Average May

    49.6 °F

  • Highest 8 May, 2026

    73.4 °F

Climate (2021–Present)

Mammoth Yosemite Airport (10.6 miles)

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  • Average Low 2021–2026

    29.6 °F

  • Average 2021–2026

    45.8 °F

  • Average High 2021–2026

    60.7 °F
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