Rancho Fontana Weather Forecast

    • 62
    • 89

    Becoming Sunny

    • 62
    • 90

    Mostly Sunny

    • 59
    • 89

    Mostly Sunny

    • 58
    • 83

    Partly Sunny

    • 57
    • 81

    Mostly Sunny

    • 58
    • 83

    Mostly Sunny

Today 3 Jun San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy with patchy fog in the morning. Becoming mostly sunny. Warmer. Highs 86 to 94. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph in the afternoon.

Tonight 3 Jun San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 56 to 61. Areas of Winds west to 10 Mph in the evening becoming light.

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Rancho Fontana Temperature Statistics

June Temperature

Ontario International Airport (7.5 miles)

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Climate (2021–Present)

Ontario International Airport (7.5 miles)

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  • Average Low 2021–2026

    55.8 °F

  • Average 2021–2026

    67.1 °F

  • Average High 2021–2026

    79.4 °F
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