Rancho Cucamonga Weather Forecast

    • 49
    • 74

    Sunny

    • 49
    • 73

    Mostly Sunny

    • 51
    • 79

    Mostly Sunny

    • 53
    • 75

    Mostly Sunny

    • 58
    • 81

    Sunny

    • 60
    • 87

    Mostly Sunny

Today 19 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Sunny, warmer. Highs 72 to 77. Areas of Winds east 10 to 15 Mph with Gusts to 30 Mph.

Tonight 19 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 40 to 44 in wind Sheltered Areas to 42 to 50 in warmer Locations. Areas of Winds west 10 Mph in the evening becoming light.

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Rancho Cucamonga Temperature Statistics

March Temperature

Ontario International Airport (3.7 miles)

  • Lowest 8 March, 2025

    39.9 °F

  • Average March

    53.9 °F

  • Highest 9 March, 2025

    75 °F

Climate (2020–Present)

Ontario International Airport (3.7 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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