Big Margaret Lake Weather Forecast

    • 45
    • 63

    Mostly Sunny

    • 46
    • 65

    Partly Sunny

    • 43
    • 58

    Chance Rain

    • 41
    • 53

    Chance Rain Showers

    • 41
    • 56

    Slight Chance Thunderstorms

    • 42
    • 58

    Mostly Sunny

Today 16 Sep Upper San Joaquin River

Sunny. Highs 60 to 74. Southeast Winds up to 10 Mph shifting to the southwest in the afternoon.

Tonight 16 Sep Upper San Joaquin River

Mostly clear. Lows 42 to 54. West Winds up to 10 Mph shifting to the northeast after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Margaret Lake Temperature Statistics

September Temperature

Mammoth Yosemite Airport (15.5 miles)

  • Lowest 7 September, 2025

    35.6 °F

  • Average September

    57.4 °F

  • Highest 1 September, 2025

    80.6 °F

Climate (2020–Present)

Mammoth Yosemite Airport (15.5 miles)

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  • Average Low 2020–2025

    29.7 °F

  • Average 2020–2025

    46.2 °F

  • Average High 2020–2025

    61 °F
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