Grinnell Lake Weather Forecast

    • 33
    • 53

    Breezy

    • 26
    • 49

    Breezy

    • 28
    • 48

    Mostly Sunny

    • 32
    • 52

    Mostly Sunny

    • 33
    • 55

    Mostly Sunny

    • 33
    • 56

    Sunny

Today 26 Jun Upper San Joaquin River

Mostly sunny. Highs 52 to 66. Southwest Winds 10 to 20 Mph with Gusts to around 45 Mph.

Tonight 26 Jun Upper San Joaquin River

Partly cloudy. Lows 36 to 46. Southwest Winds 5 to 20 Mph with Gusts to around 55 Mph.

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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

    65.4 °F

  • Highest 16 June, 2026

    86 °F

Climate (2021–2026)

Mammoth Yosemite Airport (10.6 miles)

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  • Average Low 2021–2026

    29.5 °F

  • Average 2021–2026

    45.8 °F

  • Average High 2021–2026

    60.7 °F
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