Ontario International Airport Weather Forecast

    • 48
    • 69

    Mostly Sunny

    • 48
    • 69

    Mostly Sunny

    • 50
    • 76

    Sunny

    • 52
    • 78

    Mostly Sunny

    • 50
    • 78

    Mostly Sunny

    • 49
    • 71

    Patchy Fog

Today 23 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Sunny. Highs 66 to 71. Areas of Winds southeast to 10 Mph becoming west 10 Mph this afternoon.

Tonight 23 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 42 to 45 in wind Sheltered Areas to 45 to 49 in warmer Locations. Areas of Winds southeast to 10 Mph in the evening becoming light.

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Ontario International Airport Temperature Statistics

November Temperature

Ontario International Airport (1.2 miles)

  • Lowest 19 November, 2025

    45 °F

  • Average November

    62.8 °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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