Fontana Weather Forecast

    • 40
    • 60

    Mostly Sunny

    • 41
    • 59

    Partly Sunny

    • 48
    • 57

    Rain

    • 40
    • 54

    Rain

    • 35
    • 50

    Slight Chance Rain Showers

    • 36
    • 54

    Mostly Sunny

    • 40
    • 56

    Partly Sunny

Today 8 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs around 60. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana Temperature Statistics

December Temperature

Ontario International Airport (8.1 miles)

  • Lowest 6 December, 2022

    45 °F
  • Average December

    54.8 °F
  • Highest 3 December, 2022

    71.1 °F

Climate (2010–Present)

Ontario International Airport (8.1 miles)

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  • Average Low 2010–Present

    56.8 °F
  • Average 2010–Present

    67.1 °F
  • Average High 2010–Present

    80.2 °F
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