Grinnell Lake Weather Forecast

    • 46
    • 66

    Mostly Sunny

    • 43
    • 65

    Slight Chance Thunderstorms

    • 35
    • 59

    Breezy

    • 38
    • 59

    Mostly Sunny

    • 40
    • 61

    Mostly Sunny

    • 42
    • 64

    Mostly Sunny

Today 17 Jun Upper San Joaquin River

Sunny. A 20 percent chance of Thunderstorms late in the afternoon. Highs 64 to 80. Northeast Winds up to 5 Mph shifting to the west in the afternoon.

Tonight 17 Jun Upper San Joaquin River

Partly cloudy with a 20 percent chance of Thunderstorms in the Evening, then clear after midnight. Lows 47 to 57. Northwest Winds up to 10 Mph shifting to the northeast after midnight.

Graph Plots Open in Graphs

  • 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

    64.2 °F

  • Highest 12 June, 2026

    84.2 °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

    29.6 °F

  • Average 2021–2026

    45.8 °F

  • Average High 2021–2026

    60.7 °F
Get WillyWeather+ to remove ads