Rancho Fontana Weather Forecast

    • 57
    • 78

    Decreasing Clouds

    • 60
    • 82

    Mostly Sunny

    • 60
    • 85

    Mostly Sunny

    • 59
    • 84

    Mostly Sunny

    • 57
    • 82

    Mostly Sunny

    • 61
    • 83

    Sunny

Today 9 Jun San Bernardino and Riverside County Valleys-The Inland Empire

Patchy fog in the morning. Partly cloudy with patchy drizzle in the Morning, then mostly sunny in the afternoon. Highs 78 to 85. Light Winds becoming southwest 10 to 15 Mph in the afternoon.

Tonight 9 Jun San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. Patchy drizzle overnight. Patchy fog overnight. Lows 51 to 57. Areas of Winds southwest 10 to 15 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

    67.7 °F

  • Highest 5 June, 2024

    87.1 °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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