Grinnell Lake Weather Forecast

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    • 64

    Mostly Sunny

    • 44
    • 64

    Slight Chance Thunderstorms

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    • 63

    Mostly Sunny

    • 43
    • 63

    Mostly Sunny

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    • 64

    Mostly Sunny

    • 44
    • 65

    Mostly Sunny

Today 11 Jun Upper San Joaquin River

Sunny. Highs 62 to 80. Southwest Winds up to 15 Mph.

Tonight 11 Jun Upper San Joaquin River

Mostly clear. Lows 45 to 57. West Winds up to 10 Mph shifting to the northeast after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Lake Temperature Statistics

June Temperature

Mammoth Yosemite Airport (10.6 miles)

  • Lowest 8 June, 2026

    33.8 °F

  • Average June

    62.3 °F

  • Highest 4 June, 2026

    82.4 °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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