Rancho Cucamonga Weather Forecast

    • 52
    • 73

    Becoming Sunny

    • 55
    • 77

    Sunny

    • 56
    • 82

    Partly Sunny

    • 53
    • 82

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

    • 51
    • 72

    Partly Sunny

Today 16 Apr San Bernardino and Riverside County Valleys-The Inland Empire

Patchy fog this morning. Partly cloudy. Highs 71 to 76. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 16 Apr San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. Patchy fog overnight. Lows 45 to 52. Areas of Winds southwest 10 to 15 Mph with Gusts to 25 Mph becoming south 15 to 25 Mph with Gusts to 45 Mph overnight.

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  • Temperature Real-Time

Rancho Cucamonga Temperature Statistics

April Temperature

Ontario International Airport (3.7 miles)

  • Lowest 13 April, 2026

    50 °F

  • Average April

    67.4 °F

  • Highest 4 April, 2026

    89.7 °F

Climate (2021–Present)

Ontario International Airport (3.7 miles)

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  • Average Low 2021–2026

    55.8 °F

  • Average 2021–2026

    67 °F

  • Average High 2021–2026

    79.4 °F
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