Flag Hill Park Weather Forecast

    • 72
    • 98

    Hot

    • 68
    • 93

    Mostly Sunny

    • 64
    • 89

    Mostly Sunny

    • 63
    • 86

    Sunny

    • 60
    • 86

    Mostly Sunny

    • 59
    • 84

    Sunny

    • 63
    • 85

    Mostly Sunny

Today 10 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Hot. Highs 100 to 108. Areas of Winds south to 10 Mph becoming west with Gusts to 25 Mph this afternoon.

Tonight 10 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Clear. Lows 68 to 73. Areas of Winds west to 10 Mph this evening becoming light.

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Flag Hill Park Temperature Statistics

September Temperature

Big Bear City Airport (18.6 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 (18.6 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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