Rancho Fontana Weather Forecast

    • 62
    • 87

    Becoming Sunny

    • 62
    • 85

    Mostly Sunny

    • 61
    • 84

    Mostly Sunny

    • 60
    • 82

    Mostly Sunny

    • 61
    • 84

    Mostly Sunny

    • 61
    • 86

    Mostly Sunny

Today 6 Jun San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs 86 to 96. Light Winds becoming west 10 to 15 Mph this afternoon.

Tonight 6 Jun San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 57 to 62. Areas of Winds west to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rancho Fontana Temperature Statistics

June Temperature

Ontario International Airport (7.5 miles)

  • Lowest 3 June, 2024

    55.9 °F

  • Average June

    65.9 °F

  • Highest 4 June, 2024

    82.9 °F

Climate (2019–Present)

Ontario International Airport (7.5 miles)

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  • Average Low 2019–2024

    55.6 °F

  • Average 2019–2024

    66.3 °F

  • Average High 2019–2024

    78.9 °F
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