Etiwanda Weather Forecast

    • 57
    • 81

    Sunny

    • 56
    • 82

    Sunny

    • 55
    • 81

    Sunny

    • 53
    • 78

    Mostly Sunny

    • 52
    • 75

    Mostly Sunny

    • 51
    • 73

    Mostly Sunny

Today 9 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Sunny. Highs 78 to 84. Areas of Winds north 10 to 15 Mph. Gusts to 25 Mph. Becoming 30 Mph this afternoon.

Tonight 9 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Clear. Lows 38 to 42 in wind Sheltered Areas to 45 to 55 in warmer Locations. Areas of Winds east 10 to 15 Mph becoming north overnight. Gusts to 30 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Etiwanda Temperature Statistics

December Temperature

Ontario International Airport (5.6 miles)

  • Lowest 2 December, 2025

    46 °F

  • Average December

    58.1 °F

  • Highest 1 December, 2025

    73 °F

Climate (2020–Present)

Ontario International Airport (5.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    55.5 °F

  • Average 2020–2025

    66.6 °F

  • Average High 2020–2025

    78.9 °F
Get WillyWeather+ to remove ads