Grinnell Lake Weather Forecast

    • 37
    • 59

    Increasing Clouds

    • 34
    • 56

    Mostly Sunny

    • 26
    • 46

    Breezy

    • 23
    • 41

    Mostly Cloudy

    • 19
    • 40

    Partly Sunny

    • 23
    • 42

    Mostly Sunny

Today 8 Oct Upper San Joaquin River

Sunny. Highs 60 to 76. Northeast Winds up to 10 Mph shifting to the southwest in the afternoon.

Tonight 8 Oct Upper San Joaquin River

Mostly clear. Lows 41 to 53. West Winds up to 5 Mph with Gusts to around 20 Mph shifting to the east after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Lake Temperature Statistics

October Temperature

Mammoth Yosemite Airport (10.6 miles)

  • Lowest 1 October, 2026

    32 °F

  • Average October

    58.9 °F

  • Highest 1 October, 2026

    78.8 °F

Climate (2021–2026)

Mammoth Yosemite Airport (10.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    29.5 °F

  • Average 2021–2026

    45.7 °F

  • Average High 2021–2026

    60.5 °F
Get WillyWeather+ to remove ads