San Bernardino National Forest Weather Forecast

    • 60
    • 69

    Partly Cloudy

    • 57
    • 69

    Rain Showers Likely

    • 53
    • 61

    Rain Showers

    • 53
    • 58

    Chance Thunderstorms

    • 54
    • 61

    Chance Thunderstorms

    • 56
    • 64

    Chance Thunderstorms

Today 16 Sep San Bernardino County Mountains

Sunny this morning. Becoming partly cloudy. Highs 69 to 79 above 6000 feet to 80 to 89 below 6000 feet. Areas of Winds south 10 to 15 Mph. Gusts to 25 Mph this afternoon.

Tonight 16 Sep San Bernardino County Mountains

Mostly clear in the evening. Becoming partly cloudy. Lows 49 to 59 above 6000 feet to 60 to 69 below 6000 feet. Areas of Winds west overnight. Areas of Winds south 10 Mph in the evening.

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San Bernardino National Forest Temperature Statistics

September Temperature

Big Bear City Airport (9.9 miles)

  • Lowest 12 September, 2025

    32 °F

  • Average September

    57.5 °F

  • Highest 1 September, 2025

    78.8 °F

Climate (2020–Present)

Big Bear City Airport (9.9 miles)

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  • Average Low 2020–2025

    34.1 °F

  • Average 2020–2025

    49.3 °F

  • Average High 2020–2025

    60.1 °F
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