Rialto Weather Forecast

    • 61
    • 79

    Gradual Clearing

    • 56
    • 72

    Chance Rain Showers

    • 54
    • 75

    Partly Sunny

    • 57
    • 78

    Mostly Sunny

    • 59
    • 84

    Mostly Sunny

    • 60
    • 86

    Mostly Sunny

Today 20 Sep San Bernardino and Riverside County Valleys

Cloudy in the morning. Becoming mostly 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 20 Sep San Bernardino and Riverside County Valleys

Mostly clear in the evening. Becoming cloudy. Lows 51 to 61. Areas of Winds southwest 15 Mph with Gusts to 25 Mph in the evening becoming light.

Graph Plots Open in Graphs
  • Temperature Forecast NOAA

  • Temperature Real-Time

Rialto Temperature Statistics

September Temperature

Corona Airport (19.3 miles)

  • Lowest 18 September, 2017

    53.1 °F
  • Average September

    76.2 °F
  • Highest 1 September, 2017

    108 °F

Climate (2010–Present)

Corona Airport (19.3 miles)

Take a look at our website widgetsAvailable free! Find Out More
  • Average Low 2010–Present

    53.8 °F
  • Average 2010–Present

    67.3 °F
  • Average High 2010–Present

    79.8 °F
Get an account to remove ads