Fontana Gateway Weather Forecast

    • 47
    • 67

    Partly Sunny

    • 49
    • 70

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

    • 50
    • 76

    Mostly Cloudy

    • 50
    • 66

    Rain Likely

    • 47
    • 59

    Chance Rain

Today 31 Jan San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny this morning. Becoming partly cloudy. Patchy frost in Colder. Wind Sheltered Locations this morning. Warmer. Highs 66 to 69. Light Winds becoming west to 10 Mph this afternoon.

Tonight 31 Jan San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy in the evening. Becoming mostly clear. Lows 39 to 44 in wind Sheltered Areas to 43 to 50 in warmer Locations. Areas of Winds west to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana Gateway Temperature Statistics

January Temperature

Ontario International Airport (3.1 miles)

  • Lowest 11 January, 2025

    39.7 °F

  • Average January

    57.1 °F

  • Highest 2 January, 2025

    85.6 °F

Climate (2020–Present)

Ontario International Airport (3.1 miles)

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  • Average Low 2020–2025

    55.6 °F

  • Average 2020–2025

    66.6 °F

  • Average High 2020–2025

    79.1 °F
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