Ontario International Airport Weather Forecast

    • 58
    • 80

    Sunny

    • 59
    • 82

    Mostly Sunny

    • 56
    • 80

    Mostly Cloudy

    • 55
    • 76

    Chance Rain Showers

    • 53
    • 67

    Rain Showers Likely

    • 51
    • 67

    Chance Rain Showers

Today 7 Apr San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 78 to 84. Areas of Winds southwest to 10 Mph becoming west with Gusts to 25 Mph this afternoon.

Tonight 7 Apr San Bernardino and Riverside County Valleys-The Inland Empire

Clear. Lows 49 to 52 in wind Sheltered Areas to 51 to 58 in warmer Locations. Areas of Winds west 10 to 15 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ontario International Airport Temperature Statistics

April Temperature

Ontario International Airport (1.2 miles)

  • Lowest 3 April, 2026

    50.6 °F

  • Average April

    69.1 °F

  • Highest 4 April, 2026

    88 °F

Climate (2021–Present)

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

    79.4 °F
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