Rancho Fontana Weather Forecast

    • 58
    • 72

    Blowing Dust

    • 59
    • 84

    Blowing Dust

    • 52
    • 77

    Mostly Sunny

    • 54
    • 73

    Partly Sunny

    • 60
    • 83

    Sunny

    • 62
    • 89

    Sunny

    • 60
    • 90

    Mostly Sunny

Today 7 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Sunny. Areas of blowing dust. Highs 69 to 76. Areas of Winds northeast 20 to 30 Mph. Gusts to 45 Mph. Becoming 40 Mph this afternoon.

Tonight 7 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Clear. Areas of blowing dust overnight. Lows 45 to 48 in wind Sheltered Areas to 48 to 57 in warmer Locations. Areas of Winds northeast 20 to 30 Mph. Gusts to 45 Mph. Becoming 50 Mph overnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rancho Fontana Temperature Statistics

March Temperature

Ontario International Airport (7.5 miles)

  • Lowest 3 March, 2026

    51.1 °F

  • Average March

    63 °F

  • Highest 1 March, 2026

    82.9 °F

Climate (2021–Present)

Ontario International Airport (7.5 miles)

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  • Average Low 2021–2026

    55.7 °F

  • Average 2021–2026

    66.8 °F

  • Average High 2021–2026

    79.1 °F
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