Fontana Weather Forecast

    • 70
    • 97

    Hot

    • 73
    • 104

    Hot

    • 69
    • 101

    Hot

    • 66
    • 92

    Partly Sunny

    • 67
    • 92

    Mostly Sunny

    • 67
    • 93

    Mostly Sunny

Today 14 Jul San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 95 to 101. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph in the afternoon.

Tonight 14 Jul San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 66 to 70. Areas of Winds west 10 to 15 Mph with Gusts to 25 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana Temperature Statistics

July Temperature

Ontario International Airport (8.1 miles)

  • Lowest 3 July, 2026

    59.6 °F

  • Average July

    77.6 °F

  • Highest 7 July, 2026

    97.6 °F

Climate (2021–2026)

Ontario International Airport (8.1 miles)

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

  • Average Low 2021–2026

    55.8 °F

  • Average 2021–2026

    67 °F

  • Average High 2021–2026

    79.3 °F
Get WillyWeather+ to remove ads