Cucamonga-Guasti Regional Park Weather Forecast

    • 66
    • 93

    Mostly Sunny

    • 67
    • 98

    Hot

    • 66
    • 99

    Hot

    • 68
    • 98

    Hot

    • 66
    • 99

    Hot

    • 63
    • 94

    Mostly Sunny

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

Mostly sunny. Highs 89 to 95. Areas of Winds north 10 to 15 Mph with Gusts to 30 Mph.

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

Mostly clear. Lows 56 to 60 in wind Sheltered Areas to 60 to 69 in warmer Locations. Areas of Winds east 10 to 15 Mph. Gusts to 25 Mph in the evening.

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  • Temperature Real-Time

Cucamonga-Guasti Regional Park Temperature Statistics

March Temperature

Ontario International Airport (1.2 miles)

  • Lowest 6 March, 2026

    51.1 °F

  • Average March

    66.9 °F

  • Highest 12 March, 2026

    91 °F

Climate (2021–Present)

Ontario International Airport (1.2 miles)

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  • Average Low 2021–2026

    55.7 °F

  • Average 2021–2026

    66.9 °F

  • Average High 2021–2026

    79.2 °F
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