Lake Riverside Weather Forecast

    • 51
    • 82

    Sunny

    • 51
    • 79

    Sunny

    • 57
    • 81

    Mostly Sunny

    • 60
    • 82

    Chance Rain Showers

    • 61
    • 79

    Chance Rain Showers

    • 58
    • 81

    Chance Rain Showers

Today 2 Sep Riverside County Mountains

Sunny. Highs 76 to 86. Areas of Winds west 10 to 20 Mph. Gusts to 35 Mph. Becoming 30 Mph this afternoon.

Tonight 2 Sep Riverside County Mountains

Clear, cooler. Lows 46 to 56. Areas of Winds west 10 to 20 Mph. Gusts to 35 Mph. Becoming 30 Mph overnight.

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  • Temperature Forecast NOAA

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Lake Riverside Temperature Statistics

September Temperature

Big Bear City Airport (51.6 miles)

  • Lowest

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  • Average September

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Climate (2021–2026)

Big Bear City Airport (51.6 miles)

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  • Average Low 2021–2026

    33.8 °F

  • Average 2021–2026

    48.9 °F

  • Average High 2021–2026

    60.4 °F
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