Grinnell Lake Weather Forecast

    • 25
    • 46

    Mostly Sunny

    • 29
    • 49

    Mostly Sunny

    • 31
    • 53

    Mostly Sunny

    • 28
    • 50

    Mostly Sunny

    • 27
    • 50

    Mostly Sunny

    • 30
    • 51

    Mostly Sunny

    • 31
    • 54

    Mostly Sunny

Today 19 May Upper San Joaquin River

Warmer, sunny. Highs 47 to 65. Northwest Winds up to 15 Mph with Gusts to around 30 Mph.

Tonight 19 May Upper San Joaquin River

Mostly clear. Lows 29 to 43. Southwest Winds up to 10 Mph. Gusts up to 30 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Lake Temperature Statistics

May Temperature

Mammoth Yosemite Airport (10.6 miles)

  • Lowest 7 May, 2025

    23 °F

  • Average May

    48.6 °F

  • Highest 9 May, 2025

    73.4 °F

Climate (2020–Present)

Mammoth Yosemite Airport (10.6 miles)

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  • Average Low 2020–2025

    29.8 °F

  • Average 2020–2025

    46.4 °F

  • Average High 2020–2025

    61.2 °F
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