Grinnell Lake Weather Forecast

    • 33
    • 57

    Mostly Sunny

    • 35
    • 60

    Mostly Sunny

    • 34
    • 61

    Mostly Sunny

    • 31
    • 57

    Partly Sunny

    • 31
    • 51

    Partly Sunny

    • 33
    • 52

    Partly Sunny

    • 32
    • 56

    Partly Sunny

Today 18 Mar Upper San Joaquin River

Sunny. Highs 55 to 73. South Winds up to 10 Mph shifting to the southwest in the afternoon. Gusts up to 25 Mph.

Tonight 18 Mar Upper San Joaquin River

Mostly clear. Lows 36 to 50. West Winds up to 10 Mph shifting to the northwest after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Lake Temperature Statistics

March Temperature

Mammoth Yosemite Airport (10.6 miles)

  • Lowest 4 March, 2026

    19.4 °F

  • Average March

    40.9 °F

  • Highest 16 March, 2026

    69.8 °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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