Lake Riverside Weather Forecast

    • 50
    • 76

    Sunny

    • 51
    • 75

    Sunny

    • 51
    • 74

    Mostly Sunny

    • 47
    • 69

    Rain Showers Likely

    • 42
    • 59

    Rain Showers

    • 45
    • 62

    Mostly Sunny

    • 47
    • 68

    Mostly Sunny

Today 18 Oct Riverside County Mountains

Partly cloudy in the morning. Becoming mostly sunny. Highs 55 to 65.

Tonight 18 Oct Riverside County Mountains

Clear. Lows 41 to 51. Light Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Riverside Temperature Statistics

October Temperature

Big Bear City Airport (51.6 miles)

  • Lowest 13 October, 2026

    27.5 °F

  • Average October

    55.1 °F

  • Highest 2 October, 2026

    75.7 °F

Climate (2021–2026)

Big Bear City Airport (51.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    33.9 °F

  • Average 2021–2026

    48.9 °F

  • Average High 2021–2026

    60.4 °F
Get WillyWeather+ to remove ads