Ontario International Airport Weather Forecast

    • 52
    • 75

    Patchy Fog

    • 52
    • 72

    Partly Sunny

    • 58
    • 84

    Sunny

    • 62
    • 96

    Sunny

    • 63
    • 98

    Hot

    • 60
    • 94

    Mostly Sunny

    • 60
    • 94

    Sunny

Today 9 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 71 to 76. Light Winds becoming southwest 10 to 15 Mph with Gusts to 30 Mph this afternoon.

Tonight 9 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. Patchy fog overnight. Lows 43 to 46 in wind Sheltered Areas to 45 to 54 in warmer Locations. Areas of Winds west 10 to 15 Mph with Gusts to 30 Mph this evening becoming light.

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Ontario International Airport Temperature Statistics

March Temperature

Ontario International Airport (1.2 miles)

  • Lowest 3 March, 2026

    51.1 °F

  • Average March

    63.6 °F

  • Highest 1 March, 2026

    82.9 °F

Climate (2021–Present)

Ontario International Airport (1.2 miles)

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  • Average Low 2021–2026

    55.7 °F

  • Average 2021–2026

    66.8 °F

  • Average High 2021–2026

    79.1 °F
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