Ontario International Airport Weather Forecast

    • 52
    • 66

    Partly Sunny

    • 56
    • 75

    Mostly Sunny

    • 58
    • 84

    Sunny

    • 61
    • 86

    Sunny

    • 62
    • 88

    Sunny

    • 62
    • 92

    Sunny

Today 5 May San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy with a slight chance of Showers. Highs 60 to 67. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon. Chance of measurable precipitation 20 percent.

Tonight 5 May San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. Lows 43 to 52. Areas of Winds west 10 to 15 Mph with Gusts to 25 Mph in the evening becoming light.

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Ontario International Airport Temperature Statistics

May Temperature

Ontario International Airport (1.2 miles)

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Climate (2021–Present)

Ontario International Airport (1.2 miles)

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  • Average Low 2021–2026

    55.8 °F

  • Average 2021–2026

    67 °F

  • Average High 2021–2026

    79.4 °F
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