Lake Riverside Weather Forecast

    • 43
    • 67

    Decreasing Clouds

    • 44
    • 73

    Mostly Sunny

    • 47
    • 77

    Mostly Sunny

    • 47
    • 81

    Mostly Sunny

    • 47
    • 81

    Sunny

    • 47
    • 79

    Mostly Sunny

Today 17 May Riverside County Mountains

Partly cloudy. Highs 63 to 73. Areas of Winds west 10 to 15 Mph with Gusts to 30 Mph. Becoming 25 to 35 Mph with Gusts to 55 Mph this afternoon.

Tonight 17 May Riverside County Mountains

Patchy fog in the evening. Partly cloudy. Lows 38 to 48. Areas of Winds west 25 to 35 Mph with Gusts to 50 Mph becoming 15 to 25 Mph with Gusts to 40 Mph overnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Riverside Temperature Statistics

May Temperature

Big Bear City Airport (51.6 miles)

  • Lowest 6 May, 2026

    27.7 °F

  • Average May

    54.2 °F

  • Highest 10 May, 2026

    77.9 °F

Climate (2021–Present)

Big Bear City Airport (51.6 miles)

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  • Average Low 2021–2026

    34 °F

  • Average 2021–2026

    49 °F

  • Average High 2021–2026

    60.3 °F
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