Ontario International Airport Weather Forecast

    • 45
    • 62

    Increasing Clouds

    • 48
    • 57

    Rain Showers

    • 49
    • 61

    Chance Rain Showers

    • 48
    • 67

    Mostly Sunny

    • 48
    • 70

    Mostly Sunny

    • 49
    • 70

    Mostly Sunny

Today 19 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 58 to 63. Light Winds.

Tonight 19 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. A slight chance of Showers in the evening. Lows 40 to 45. Light Winds. Chance of measurable precipitation 20 percent.

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Ontario International Airport Temperature Statistics

November Temperature

Ontario International Airport (1.2 miles)

  • Lowest 2 November, 2025

    53.1 °F

  • Average November

    65.5 °F

  • Highest 10 November, 2025

    93 °F

Climate (2020–Present)

Ontario International Airport (1.2 miles)

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  • Average Low 2020–2025

    55.5 °F

  • Average 2020–2025

    66.6 °F

  • Average High 2020–2025

    78.9 °F
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