Ontario Weather Forecast

    • 47
    • 62

    Rain Showers Likely

    • 45
    • 64

    Mostly Sunny

    • 45
    • 67

    Partly Sunny

    • 47
    • 68

    Partly Sunny

    • 48
    • 71

    Mostly Sunny

    • 50
    • 74

    Mostly Sunny

Today 8 Dec Los Angeles County San Gabriel Valley

Showers in the Morning, then Showers likely with a slight chance of Thunderstorms in the afternoon. Highs in the lower 60s.

Tonight 8 Dec Los Angeles County San Gabriel Valley

Mostly cloudy with a 40 percent chance of Showers in the Evening, becoming partly cloudy after midnight. Lows in the mid 40s to around 50.

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Ontario Temperature Statistics

December Temperature

Corona Airport (11.8 miles)

  • Lowest 2 December, 2019

    37.9 °F
  • Average December

    55.1 °F
  • Highest 2 December, 2019

    72 °F

Climate (2010–Present)

Corona Airport (11.8 miles)

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  • Average Low 2010–Present

    53.4 °F
  • Average 2010–Present

    66.6 °F
  • Average High 2010–Present

    79.5 °F
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