Rancho Fontana Weather Forecast

    • 61
    • 87

    Mostly Sunny

    • 55
    • 83

    Mostly Sunny

    • 51
    • 71

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

    • 53
    • 76

    Sunny

    • 54
    • 75

    Mostly Sunny

Today 28 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy this morning. Becoming mostly sunny. Highs 85 to 90. Light Winds becoming southwest 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 28 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 53 to 56 in wind Sheltered Areas to 56 to 62 in warmer Locations. Areas of Winds east to 10 Mph this evening becoming light.

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Rancho Fontana Temperature Statistics

February Temperature

Ontario International Airport (7.5 miles)

  • Lowest 21 February, 2026

    37.7 °F

  • Average February

    60.4 °F

  • Highest 4 February, 2026

    87.7 °F

Climate (2021–Present)

Ontario International Airport (7.5 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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