Ontario International Airport Weather Forecast

    • 56
    • 84

    Mostly Sunny

    • 54
    • 79

    Partly Sunny

    • 55
    • 78

    Mostly Sunny

    • 60
    • 82

    Mostly Sunny

    • 61
    • 88

    Mostly Sunny

    • 61
    • 88

    Mostly Sunny

    • 59
    • 86

    Mostly Sunny

Today 24 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Warmer. Highs 82 to 87. Light Winds becoming west 10 Mph this afternoon.

Tonight 24 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 52 to 57. Areas of Winds west to 10 Mph this evening becoming light.

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Ontario International Airport Temperature Statistics

October Temperature

Ontario International Airport (1.2 miles)

  • Lowest 16 October, 2025

    53.1 °F

  • Average October

    67.5 °F

  • Highest 10 October, 2025

    91.9 °F

Climate (2020–Present)

Ontario International Airport (1.2 miles)

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  • Average Low 2020–2025

    55.4 °F

  • Average 2020–2025

    66.5 °F

  • Average High 2020–2025

    78.9 °F
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