Downtown Fontana Weather Forecast

    • 66
    • 90

    Mostly Sunny

    • 62
    • 89

    Mostly Sunny

    • 54
    • 83

    Mostly Sunny

    • 51
    • 73

    Mostly Sunny

    • 53
    • 75

    Mostly Sunny

    • 52
    • 76

    Mostly Sunny

Today 27 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 88 to 93. Areas of Winds north to 10 Mph. Gusts to 25 Mph this morning.

Tonight 27 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear in the evening. Becoming partly cloudy. Lows 56 to 59 in wind Sheltered Areas to 59 to 67 in warmer Locations. Light Winds.

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Downtown Fontana Temperature Statistics

February Temperature

Ontario International Airport (8.7 miles)

  • Lowest 21 February, 2026

    37.7 °F

  • Average February

    60.1 °F

  • Highest 4 February, 2026

    87.7 °F

Climate (2021–Present)

Ontario International Airport (8.7 miles)

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  • Average Low 2021–2026

    55.6 °F

  • Average 2021–2026

    66.7 °F

  • Average High 2021–2026

    79.1 °F
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