Summit Heights Weather Forecast

    • 55
    • 78

    Sunny

    • 51
    • 75

    Partly Sunny

    • 49
    • 65

    Chance Rain Showers

    • 50
    • 65

    Partly Sunny

    • 44
    • 56

    Chance Rain Showers

    • 41
    • 56

    Mostly Sunny

    • 42
    • 61

    Mostly Sunny

Today 5 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Areas of dense fog in the morning. Local visibility one quarter mile or less at Times in the morning. Warmer. Highs 74 to 79. Light Winds.

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Summit Heights Temperature Statistics

December Temperature

Ontario International Airport (8.7 miles)

  • Lowest 2 December, 2021

    48.9 °F

  • Average December

    59.8 °F

  • Highest 1 December, 2021

    87.1 °F

Climate (2010–Present)

Ontario International Airport (8.7 miles)

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  • Average Low 2010–Present

    56.9 °F

  • Average 2010–Present

    67.1 °F

  • Average High 2010–Present

    80.3 °F
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