Brown Bear Lake Weather Forecast

    • 30
    • 48

    Sunny

    • 31
    • 49

    Mostly Sunny

    • 29
    • 47

    Breezy

    • 33
    • 51

    Mostly Sunny

    • 38
    • 52

    Chance Rain

    • 38
    • 50

    Chance Rain Showers

    • 35
    • 50

    Chance Rain Showers

Today 4 Sep Upper San Joaquin River

Sunny. Highs 49 to 63. Southwest Winds 10 to 15 Mph with Gusts to around 45 Mph.

Tonight 4 Sep Upper San Joaquin River

Mostly clear. Lows 33 to 43. Southwest Winds up to 15 Mph with Gusts to around 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Brown Bear Lake Temperature Statistics

September Temperature

Mammoth Yosemite Airport (19.3 miles)

  • Lowest 2 September, 2026

    42.8 °F

  • Average September

    56.5 °F

  • Highest 1 September, 2026

    71.6 °F

Climate (2021–2026)

Mammoth Yosemite Airport (19.3 miles)

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  • Average Low 2021–2026

    29.5 °F

  • Average 2021–2026

    45.7 °F

  • Average High 2021–2026

    60.6 °F
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