Lake Riverside Weather Forecast

    • 51
    • 81

    Sunny

    • 48
    • 81

    Mostly Sunny

    • 49
    • 80

    Mostly Sunny

    • 52
    • 83

    Mostly Sunny

    • 50
    • 82

    Mostly Sunny

    • 50
    • 81

    Mostly Sunny

Today 31 May Riverside County Mountains

Mostly sunny. Highs 73 to 83. Areas of Winds southeast to 10 Mph becoming west in the afternoon.

Tonight 31 May Riverside County Mountains

Clear. Lows 48 to 58. Areas of Winds west 10 to 15 Mph. Becoming to 10 Mph overnight.

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Lake Riverside Temperature Statistics

May Temperature

Big Bear City Airport (51.6 miles)

  • Lowest 6 May, 2026

    27.7 °F

  • Average May

    51.9 °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

    33.9 °F

  • Average 2021–2026

    49 °F

  • Average High 2021–2026

    60.3 °F
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