Rancho Cucamonga Weather Forecast

    • 56
    • 80

    Partly Sunny

    • 58
    • 80

    Mostly Sunny

    • 60
    • 83

    Partly Sunny

    • 60
    • 87

    Partly Sunny

    • 59
    • 84

    Partly Sunny

    • 56
    • 81

    Mostly Cloudy

Today 24 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 77 to 81. Light Winds becoming west 10 to 15 Mph in the afternoon.

Tonight 24 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. Lows around 52 in wind Sheltered Areas to 53 to 58 in warmer Locations. Areas of Winds south 10 to 15 Mph with Gusts to 25 Mph in the evening becoming light.

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Rancho Cucamonga Temperature Statistics

February Temperature

Ontario International Airport (3.7 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 (3.7 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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