Fontana Weather Forecast

    • 56
    • 80

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 58
    • 79

    Partly Sunny

    • 60
    • 82

    Partly Sunny

    • 60
    • 84

    Partly Sunny

    • 59
    • 83

    Partly Sunny

Today 23 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy this morning. Becoming mostly sunny. Highs 77 to 81. Areas of Winds east 10 to 15 Mph with Gusts to 25 Mph becoming west this afternoon.

Tonight 23 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear in the evening. Becoming partly cloudy. Lows around 50 in wind Sheltered Areas to 51 to 58 in warmer Locations. Areas of Winds east to 10 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana Temperature Statistics

February Temperature

Ontario International Airport (8.1 miles)

  • Lowest 21 February, 2026

    37 °F

  • Average February

    59.1 °F

  • Highest 4 February, 2026

    87.7 °F

Climate (2021–Present)

Ontario International Airport (8.1 miles)

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

  • Average Low 2021–2026

    55.6 °F

  • Average 2021–2026

    66.7 °F

  • Average High 2021–2026

    79.1 °F
Get WillyWeather+ to remove ads