Lake Riverside Weather Forecast

    • 64
    • 91

    Slight Chance Thunderstorms

    • 66
    • 91

    Mostly Sunny

    • 65
    • 94

    Mostly Sunny

    • 64
    • 95

    Slight Chance Thunderstorms

    • 62
    • 92

    Mostly Sunny

    • 59
    • 89

    Mostly Sunny

Today 6 Aug Riverside County Mountains

Mostly sunny this Morning, then partly cloudy with a slight chance of Showers and Thunderstorms this afternoon. Highs 84 to 94. Areas of Winds west to 10 Mph. Chance of measurable precipitation 20 percent.

Tonight 6 Aug Riverside County Mountains

Mostly clear. Lows 60 to 70. Areas of Winds northwest 10 to 15 Mph in the evening becoming light.

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Lake Riverside Temperature Statistics

August Temperature

Big Bear City Airport (51.6 miles)

  • Lowest 1 August, 2026

    52.7 °F

  • Average August

    74.3 °F

  • Highest 1 August, 2026

    88 °F

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

    60.3 °F
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