Cucamonga-Guasti Regional Park Weather Forecast

    • 54
    • 82

    Mostly Cloudy

    • 51
    • 72

    Partly Sunny

    • 52
    • 76

    Sunny

    • 53
    • 81

    Mostly Sunny

    • 53
    • 78

    Mostly Cloudy

    • 48
    • 68

    Chance Rain Showers

    • 45
    • 63

    Chance Rain Showers

Today 5 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny this morning. Becoming mostly cloudy. Highs 77 to 84. Areas of Winds east 15 to 25 Mph with Gusts to 40 Mph.

Tonight 5 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Mostly cloudy with a slight chance of Showers. Lows 45 to 49 in wind Sheltered Areas to 47 to 55 in warmer Locations. Light Winds. Chance of measurable precipitation 20 percent.

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Cucamonga-Guasti Regional Park Temperature Statistics

February Temperature

Ontario International Airport (1.2 miles)

  • Lowest 2 February, 2026

    48.9 °F

  • Average February

    64.6 °F

  • Highest 3 February, 2026

    84 °F

Climate (2021–Present)

Ontario International Airport (1.2 miles)

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  • Average Low 2021–2026

    55.6 °F

  • Average 2021–2026

    66.7 °F

  • Average High 2021–2026

    79 °F
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