Guasti Weather Forecast

    • 59
    • 88

    Mostly Sunny

    • 60
    • 89

    Mostly Sunny

    • 61
    • 91

    Partly Sunny

    • 58
    • 91

    Mostly Sunny

    • 57
    • 84

    Mostly Cloudy

    • 55
    • 76

    Chance Rain Showers

    • 55
    • 74

    Mostly Cloudy

Today 26 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 85 to 90. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 26 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Clear. Lows 50 to 55 in wind Sheltered Areas to 55 to 63 in warmer Locations. Areas of Winds west to 10 Mph this evening becoming light.

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Guasti Temperature Statistics

March Temperature

Ontario International Airport (0.6 miles)

  • Lowest 6 March, 2026

    51.1 °F

  • Average March

    71.1 °F

  • Highest 19 March, 2026

    100.7 °F

Climate (2021–Present)

Ontario International Airport (0.6 miles)

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  • Average Low 2021–2026

    55.8 °F

  • Average 2021–2026

    67 °F

  • Average High 2021–2026

    79.3 °F
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