Lake Riverside Weather Forecast

    • 44
    • 70

    Increasing Clouds

    • 43
    • 66

    Mostly Cloudy

    • 41
    • 58

    Slight Chance Rain Showers

    • 40
    • 54

    Chance Rain Showers

    • 36
    • 55

    Partly Sunny

    • 38
    • 57

    Mostly Sunny

    • 39
    • 60

    Partly Sunny

Today 20 Jan Riverside County Mountains

Mostly sunny. Highs 59 to 69. Areas of Winds east 10 Mph in the morning becoming light.

Tonight 20 Jan Riverside County Mountains

Mostly clear this evening. Becoming partly cloudy. Lows 39 to 49. Light Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Riverside Temperature Statistics

January Temperature

Big Bear City Airport (51.6 miles)

  • Lowest 9 January, 2026

    21.2 °F

  • Average January

    37.7 °F

  • Highest 18 January, 2026

    60.8 °F

Climate (2021–Present)

Big Bear City Airport (51.6 miles)

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

  • Average Low 2021–2026

    34 °F

  • Average 2021–2026

    49 °F

  • Average High 2021–2026

    60 °F
Get WillyWeather+ to remove ads