Ontario International Airport Weather Forecast

    • 60
    • 89

    Sunny

    • 59
    • 89

    Mostly Sunny

    • 61
    • 89

    Mostly Sunny

    • 63
    • 91

    Partly Sunny

    • 61
    • 92

    Partly Sunny

    • 59
    • 89

    Partly Sunny

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

Mostly sunny. Highs 88 to 93. Light Winds becoming southwest 10 to 15 Mph with Gusts to 25 Mph in the afternoon.

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

Clear. Lows 51 to 55 in wind Sheltered Areas to 56 to 64 in warmer Locations. Areas of Winds west to 10 Mph with Gusts to 25 Mph in the evening becoming light.

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Ontario International Airport Temperature Statistics

March Temperature

Ontario International Airport (1.2 miles)

  • Lowest 6 March, 2026

    51.1 °F

  • Average March

    71 °F

  • Highest 19 March, 2026

    100.7 °F

Climate (2021–Present)

Ontario International Airport (1.2 miles)

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  • Average Low 2021–2026

    55.8 °F

  • Average 2021–2026

    66.9 °F

  • Average High 2021–2026

    79.3 °F
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