Grinnell Lake Weather Forecast

    • 38
    • 62

    Becoming Sunny

    • 39
    • 59

    Slight Chance Thunderstorms

    • 36
    • 60

    Mostly Sunny

    • 36
    • 56

    Sunny

    • 39
    • 60

    Sunny

    • 39
    • 61

    Mostly Sunny

    • 42
    • 63

    Mostly Sunny

Today 1 Jul Upper San Joaquin River

Sunny. Highs 61 to 77. South Winds up to 15 Mph with Gusts to around 30 Mph.

Tonight 1 Jul Upper San Joaquin River

Clear. Lows 41 to 53. Southwest Winds 5 to 10 Mph with Gusts to around 25 Mph shifting to the east after midnight.

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Grinnell Lake Temperature Statistics

July Temperature

Mammoth Yosemite Airport (10.6 miles)

  • Lowest

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  • Average July

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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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