Summit Heights Weather Forecast

    • 39
    • 60

    Mostly Sunny

    • 42
    • 58

    Partly Sunny

    • 47
    • 57

    Rain

    • 39
    • 54

    Rain

    • 36
    • 50

    Slight Chance Rain

    • 37
    • 53

    Mostly Sunny

Today 8 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs around 60. Light Winds.

Tonight 8 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear in the evening. Becoming partly cloudy. Patchy frost in Colder. Wind Sheltered Locations overnight. Lows in the upper 30s. Light Winds.

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Summit Heights Temperature Statistics

December Temperature

Ontario International Airport (8.7 miles)

  • Lowest 6 December, 2022

    45 °F

  • Average December

    54.8 °F

  • Highest 3 December, 2022

    71.1 °F

Climate (2010–Present)

Ontario International Airport (8.7 miles)

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  • Average Low 2010–Present

    56.8 °F

  • Average 2010–Present

    67.1 °F

  • Average High 2010–Present

    80.2 °F
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