Rancho Fontana Weather Forecast

    • 49
    • 61

    Chance Rain Showers

    • 47
    • 63

    Partly Sunny

    • 47
    • 67

    Sunny

    • 48
    • 67

    Mostly Sunny

    • 50
    • 70

    Mostly Sunny

    • 51
    • 72

    Mostly Sunny

Today 21 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Mostly cloudy in the morning. Becoming partly cloudy. A chance of Showers and a slight chance of Thunderstorms. Highs 58 to 63. Areas of Winds southeast 10 to 20 Mph with Gusts to 35 Mph. Chance of measurable precipitation 50 percent.

Tonight 21 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy with a chance of Showers. Lows 43 to 48. Areas of Winds east 15 to 25 Mph with Gusts to 40 Mph becoming north 10 to 20 Mph with Gusts to 35 Mph overnight. Chance of measurable precipitation 50 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Rancho Fontana Temperature Statistics

November Temperature

Ontario International Airport (7.5 miles)

  • Lowest 18 November, 2025

    46.9 °F

  • Average November

    64.2 °F

  • Highest 10 November, 2025

    93 °F

Climate (2020–Present)

Ontario International Airport (7.5 miles)

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

  • Average Low 2020–2025

    55.5 °F

  • Average 2020–2025

    66.6 °F

  • Average High 2020–2025

    78.9 °F
Get WillyWeather+ to remove ads