Rialto Weather Forecast

    • 67
    • 96

    Sunny

    • 69
    • 100

    Hot

    • 67
    • 99

    Hot

    • 68
    • 96

    Mostly Sunny

    • 70
    • 97

    Hot

    • 70
    • 97

    Hot

Today 20 Aug San Bernardino and Riverside County Valleys

Sunny. Highs 94 to 100. Light Winds becoming west 15 Mph in the afternoon.

Tonight 20 Aug San Bernardino and Riverside County Valleys

Clear. Lows 60 to 66. Light Winds.

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Rialto Temperature Statistics

August Temperature

Corona Airport (19.3 miles)

  • Lowest 10 August, 2019

    57 °F
  • Average August

    74.8 °F
  • Highest 6 August, 2019

    97 °F

Climate (2010–Present)

Corona Airport (19.3 miles)

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  • Average Low 2010–Present

    53.3 °F
  • Average 2010–Present

    66.4 °F
  • Average High 2010–Present

    79.3 °F
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