Rancho Fontana Weather Forecast

    • 59
    • 83

    Mostly Sunny

    • 58
    • 79

    Sunny

    • 63
    • 86

    Mostly Sunny

    • 65
    • 94

    Mostly Sunny

    • 63
    • 92

    Mostly Sunny

    • 61
    • 84

    Breezy

    • 65
    • 87

    Mostly Sunny

Today 19 Sep San Bernardino and Riverside County Valleys

Partly cloudy in the morning. Becoming sunny. Patchy fog in the morning. Highs 77 to 82. Light Winds becoming southwest 15 Mph with Gusts to 25 Mph in the afternoon.

Tonight 19 Sep San Bernardino and Riverside County Valleys

Clear in the evening. Becoming partly cloudy. Patchy fog overnight. Lows 50 to 58. Areas of Winds southwest 15 Mph in the evening becoming light.

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Rancho Fontana Temperature Statistics

September Temperature

Chino, Chino Airport (13 miles)

  • Lowest 17 September, 2019

    55 °F
  • Average September

    77.1 °F
  • Highest 13 September, 2019

    102.9 °F

Climate (2010–Present)

Chino, Chino Airport (13 miles)

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  • Average Low 2010–Present

    54 °F
  • Average 2010–Present

    66.2 °F
  • Average High 2010–Present

    81.6 °F
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