Ontario International Airport Weather Forecast

    • 66
    • 96

    Mostly Sunny

    • 70
    • 99

    Hot

    • 70
    • 101

    Hot

    • 69
    • 99

    Hot

    • 68
    • 98

    Hot

    • 68
    • 96

    Sunny

    • 68
    • 96

    Mostly Sunny

Today 30 Jul San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 95 to 102. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 30 Jul San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 61 to 67. Areas of Winds west to 10 Mph with Gusts to 25 Mph this evening becoming light.

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Ontario International Airport Temperature Statistics

July Temperature

Ontario International Airport (1.2 miles)

  • Lowest 3 July, 2026

    59.6 °F

  • Average July

    81.5 °F

  • Highest 15 July, 2026

    102.7 °F

Climate (2021–2026)

Ontario International Airport (1.2 miles)

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  • Average Low 2021–2026

    55.8 °F

  • Average 2021–2026

    67.1 °F

  • Average High 2021–2026

    79.3 °F
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