Rialto Weather Forecast

    • 47
    • 76

    Mostly Sunny

    • 46
    • 74

    Mostly Sunny

    • 44
    • 69

    Partly Sunny

    • 43
    • 68

    Mostly Sunny

    • 43
    • 69

    Breezy

    • 44
    • 72

    Mostly Sunny

Today 1 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 75 to 80. Light Winds.

Tonight 1 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Clear. Lows 40 to 48. Light Winds.

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Rialto Temperature Statistics

December Temperature

San Bernardino Intl. Airport (6.8 miles)

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  • Average December

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Climate (2010–Present)

San Bernardino Intl. Airport (6.8 miles)

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  • Average Low 2010–Present

    55.8 °F
  • Average 2010–Present

    65.2 °F
  • Average High 2010–Present

    82.7 °F
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