Ontario Weather Forecast

    • 47
    • 65

    Decreasing Clouds

    • 50
    • 75

    Mostly Sunny

    • 48
    • 73

    Mostly Sunny

    • 45
    • 66

    Breezy

    • 44
    • 68

    Mostly Sunny

    • 45
    • 70

    Mostly Sunny

Today 18 Jan San Bernardino and Riverside County Valleys

Partly cloudy. Slight chance of Showers in the morning. Highs 62 to 67. Light Winds. Chance of measurable precipitation 20 percent.

Tonight 18 Jan San Bernardino and Riverside County Valleys

Mostly clear. Lows 42 to 49. Areas of Winds north 15 Mph with Gusts to 25 Mph.

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Ontario Temperature Statistics

January Temperature

Corona Airport (11.8 miles)

  • Lowest

  • Average January

  • Highest

Climate (2010–Present)

Corona Airport (11.8 miles)

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  • Average Low 2010–Present

    53.2 °F
  • Average 2010–Present

    66.8 °F
  • Average High 2010–Present

    79.6 °F
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