Grout Bay Weather Forecast

    • 46
    • 65

    Rain Showers

    • 40
    • 65

    Chance Rain Showers

    • 45
    • 69

    Mostly Sunny

    • 47
    • 72

    Mostly Sunny

    • 49
    • 71

    Slight Chance Thunderstorms

    • 46
    • 73

    Mostly Sunny

Today 18 Sep San Bernardino County Mountains

Showers likely and a slight chance of Thunderstorms. Highs 61 to 71 above 6000 feet to 70 to 79 below 6000 feet. Areas of Winds south 10 to 15 Mph with Gusts to 25 Mph. Chance of measurable precipitation 70 percent.

Tonight 18 Sep San Bernardino County Mountains

Partly cloudy with a chance of Showers and a slight chance of Thunderstorms. Lows 41 to 51 above 6000 feet to 51 to 61 below 6000 feet. Areas of Winds south 10 to 15 Mph. Gusts to 25 Mph in the evening. Chance of measurable precipitation 50 percent.

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Grout Bay Temperature Statistics

September Temperature

Big Bear City Airport (5 miles)

  • Lowest 12 September, 2025

    32 °F

  • Average September

    57.4 °F

  • Highest 1 September, 2025

    78.8 °F

Climate (2020–Present)

Big Bear City Airport (5 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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