Lake Riverside Weather Forecast

    • 69
    • 98

    Slight Chance Thunderstorms

    • 66
    • 98

    Slight Chance Thunderstorms

    • 63
    • 94

    Mostly Sunny

    • 57
    • 90

    Mostly Sunny

    • 57
    • 84

    Mostly Sunny

    • 59
    • 82

    Slight Chance Rain Showers

Today 27 Aug Riverside County Mountains

Partly cloudy. A slight chance of Showers and Thunderstorms this afternoon. Highs 90 to 100. Areas of Winds southeast to 10 Mph becoming west this afternoon. Chance of measurable precipitation 20 percent.

Tonight 27 Aug Riverside County Mountains

Partly cloudy. Cooler. Lows 63 to 73. Areas of Winds west to 10 Mph in the evening becoming light.

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  • Temperature Real-Time

Lake Riverside Temperature Statistics

August Temperature

Big Bear City Airport (51.6 miles)

  • Lowest 15 August, 2026

    45.9 °F

  • Average August

    69.7 °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

    60.4 °F
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