Lake Riverside Weather Forecast

    • 45
    • 70

    Mostly Sunny

    • 45
    • 71

    Partly Sunny

    • 47
    • 71

    Partly Sunny

    • 43
    • 70

    Mostly Sunny

    • 42
    • 67

    Partly Sunny

    • 40
    • 64

    Partly Sunny

Today 17 Jan Riverside County Mountains

Mostly sunny. Highs 61 to 71. Areas of Winds northeast 10 to 20 Mph with Gusts to 30 Mph.

Tonight 17 Jan Riverside County Mountains

Mostly clear this evening. Becoming partly cloudy. Lows 39 to 49. Areas of Winds east 10 to 15 Mph with Gusts to 25 Mph.

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Lake Riverside Temperature Statistics

January Temperature

Big Bear City Airport (51.6 miles)

  • Lowest 9 January, 2026

    21.2 °F

  • Average January

    36.7 °F

  • Highest 15 January, 2026

    55.4 °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 °F
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