Green Valley Lake Weather Forecast

    • 55
    • 72

    Mostly Sunny

    • 55
    • 71

    Mostly Sunny

    • 55
    • 70

    Mostly Cloudy

    • 48
    • 64

    Mostly Sunny

    • 47
    • 61

    Sunny

    • 50
    • 65

    Mostly Sunny

    • 51
    • 69

    Sunny

Today 24 Sep San Bernardino County Mountains

Mostly sunny. Highs 66 to 76 above 6000 feet to 75 to 84 below 6000 feet.

Tonight 24 Sep San Bernardino County Mountains

Mostly clear. Lows 46 to 56 above 6000 feet to 55 to 65 below 6000 feet. Areas of Winds south 10 to 15 Mph becoming west overnight.

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Green Valley Lake Temperature Statistics

September Temperature

Big Bear City Airport (12.4 miles)

  • Lowest 19 September, 2026

    32.7 °F

  • Average September

    60.3 °F

  • Highest 10 September, 2026

    81.3 °F

Climate (2021–2026)

Big Bear City Airport (12.4 miles)

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  • Average Low 2021–2026

    33.7 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    60.4 °F
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