Ontario International Airport Weather Forecast

    • 66
    • 97

    Hot

    • 65
    • 92

    Mostly Sunny

    • 65
    • 91

    Mostly Sunny

    • 65
    • 92

    Mostly Sunny

    • 66
    • 91

    Mostly Sunny

    • 66
    • 93

    Mostly Sunny

    • 67
    • 95

    Mostly Sunny

Today 16 Jul San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 95 to 103. Areas of Winds southwest to 10 Mph. Becoming 10 to 15 Mph with Gusts to 30 Mph this afternoon.

Tonight 16 Jul San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear this evening. Becoming partly cloudy. Lows 63 to 68. Areas of Winds west 10 to 15 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

    78.1 °F

  • Highest 14 July, 2026

    98.1 °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 °F

  • Average High 2021–2026

    79.3 °F
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