Big Bear Lake Weather Forecast

    • 55
    • 80

    Slight Chance Thunderstorms

    • 54
    • 77

    Mostly Sunny

    • 51
    • 75

    Sunny

    • 49
    • 72

    Sunny

    • 47
    • 72

    Mostly Sunny

    • 48
    • 71

    Sunny

    • 50
    • 71

    Mostly Sunny

Today 10 Sep San Bernardino County Mountains

Mostly sunny this Morning, then partly cloudy with a slight chance of Showers and Thunderstorms this afternoon. Warmer. Highs 76 to 86 above 6000 feet to 86 to 95 below 6000 feet. Areas of Winds west to 10 Mph becoming southwest with Gusts to 25 Mph this afternoon. Chance of measurable precipitation 20 percent.

Tonight 10 Sep San Bernardino County Mountains

Mostly clear. Cooler. Lows 52 to 62 above 6000 feet to 62 to 72 below 6000 feet. Areas of Winds west 10 to 15 Mph.

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Big Bear Lake Temperature Statistics

September Temperature

Big Bear City Airport (3.7 miles)

  • Lowest 1 September, 2026

    41.2 °F

  • Average September

    59.7 °F

  • Highest 8 September, 2026

    72.5 °F

Climate (2021–2026)

Big Bear City Airport (3.7 miles)

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  • Average Low 2021–2026

    33.8 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    60.4 °F
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