Cucamonga-Guasti Regional Park Weather Forecast

    • 55
    • 73

    Mostly Sunny

    • 56
    • 77

    Becoming Sunny

    • 57
    • 80

    Sunny

    • 58
    • 82

    Sunny

    • 60
    • 83

    Mostly Sunny

    • 60
    • 81

    Partly Sunny

    • 59
    • 80

    Mostly Sunny

Today 4 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Patchy fog this morning. Mostly sunny. Highs 70 to 75. Light Winds.

Tonight 4 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Clear this evening. Becoming partly cloudy. Lows 51 to 55. Light Winds becoming northeast 10 Mph overnight.

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  • Temperature Real-Time

Cucamonga-Guasti Regional Park Temperature Statistics

November Temperature

Ontario International Airport (1.2 miles)

  • Lowest 2 November, 2026

    51.1 °F

  • Average November

    61.7 °F

  • Highest 2 November, 2026

    73 °F

Climate (2021–2026)

Ontario International Airport (1.2 miles)

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  • Average Low 2021–2026

    55.9 °F

  • Average 2021–2026

    67.3 °F

  • Average High 2021–2026

    79.4 °F
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