Rancho Fontana Weather Forecast

    • 59
    • 79

    Becoming Sunny

    • 63
    • 85

    Mostly Sunny

    • 65
    • 91

    Partly Sunny

    • 59
    • 85

    Partly Sunny

    • 54
    • 78

    Partly Sunny

    • 52
    • 71

    Mostly Sunny

    • 54
    • 75

    Mostly Sunny

Today 25 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy this morning. Becoming mostly sunny. Highs 77 to 81. Light Winds becoming west 10 Mph this afternoon.

Tonight 25 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy this evening. Becoming mostly clear. Lows around 51 in wind Sheltered Areas to 53 to 60 in warmer Locations. Areas of Winds west 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

    59.6 °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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