Ontario International Airport Weather Forecast

    • 62
    • 89

    Mostly Sunny

    • 60
    • 89

    Mostly Sunny

    • 58
    • 82

    Mostly Cloudy

    • 57
    • 80

    Mostly Sunny

    • 58
    • 82

    Mostly Sunny

    • 59
    • 84

    Mostly Sunny

Today 4 Jun San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 88 to 96. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 4 Jun San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 56 to 61. Areas of Winds west to 10 Mph this evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Ontario International Airport Temperature Statistics

June Temperature

Ontario International Airport (1.2 miles)

  • Lowest 1 June, 2026

    58.6 °F

  • Average June

    70.8 °F

  • Highest 1 June, 2026

    86.6 °F

Climate (2021–Present)

Ontario International Airport (1.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    55.8 °F

  • Average 2021–2026

    67.1 °F

  • Average High 2021–2026

    79.4 °F
Get WillyWeather+ to remove ads