Ontario International Airport Weather Forecast

    • 43
    • 68

    Sunny

    • 44
    • 67

    Partly Sunny

    • 44
    • 70

    Mostly Sunny

    • 46
    • 72

    Partly Sunny

    • 47
    • 70

    Mostly Cloudy

    • 47
    • 71

    Mostly Sunny

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

Patchy fog this morning. Partly cloudy this Morning, then mostly sunny with a slight chance of Showers this afternoon. Highs 61 to 69. Light Winds becoming north 10 to 15 Mph with Gusts to 30 Mph this afternoon. Chance of measurable precipitation 20 percent.

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

Mostly clear. Colder. Lows 33 to 37 in wind Sheltered Areas to 37 to 46 in warmer Locations. Areas of Winds north 10 to 15 Mph. Gusts to 30 Mph overnight.

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  • Temperature Real-Time

Ontario International Airport Temperature Statistics

January Temperature

Ontario International Airport (1.2 miles)

  • Lowest 11 January, 2026

    39.7 °F

  • Average January

    59.7 °F

  • Highest 14 January, 2026

    84.7 °F

Climate (2021–Present)

Ontario International Airport (1.2 miles)

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  • Average Low 2021–2026

    55.6 °F

  • Average 2021–2026

    66.6 °F

  • Average High 2021–2026

    78.9 °F
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