Ontario Weather Forecast

    • 51
    • 71

    Becoming Sunny

    • 54
    • 76

    Mostly Sunny

    • 56
    • 78

    Mostly Sunny

    • 54
    • 78

    Mostly Sunny

    • 55
    • 76

    Mostly Sunny

    • 56
    • 81

    Mostly Sunny

Today 27 Apr San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy in the morning. Becoming mostly sunny. Warmer. Highs 69 to 74. Areas of Winds south 10 to 15 Mph. Gusts to 25 Mph in the afternoon.

Tonight 27 Apr San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Patchy fog overnight. Lows 43 to 50. Areas of Winds southwest 10 to 15 Mph with Gusts to 25 Mph in the evening becoming light.

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Ontario Temperature Statistics

April Temperature

Ontario International Airport (3.7 miles)

  • Lowest 6 April, 2024

    41.6 °F

  • Average April

    61.2 °F

  • Highest 11 April, 2024

    88.6 °F

Climate (2019–Present)

Ontario International Airport (3.7 miles)

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  • Average Low 2019–2024

    55.7 °F

  • Average 2019–2024

    66.3 °F

  • Average High 2019–2024

    78.9 °F
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