Lake Riverside Weather Forecast

    • 44
    • 70

    Mostly Sunny

    • 47
    • 78

    Sunny

    • 48
    • 79

    Mostly Sunny

    • 49
    • 79

    Sunny

    • 48
    • 80

    Mostly Sunny

    • 48
    • 80

    Sunny

Today 18 May Riverside County Mountains

Mostly sunny. Warmer. Highs 62 to 72. Areas of Winds northeast 10 to 20 Mph. Gusts to 35 Mph. Becoming 25 Mph this afternoon.

Tonight 18 May Riverside County Mountains

Mostly clear. Lows 40 to 50. Areas of Winds northeast 10 to 15 Mph.

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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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