Etiwanda Weather Forecast

    • 49
    • 63

    Rain Showers

    • 52
    • 70

    Mostly Sunny

    • 56
    • 78

    Sunny

    • 62
    • 84

    Breezy

    • 62
    • 84

    Sunny

    • 61
    • 84

    Sunny

Today 12 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Mostly cloudy. Showers likely. Patchy fog. Highs 61 to 67. Areas of Winds southwest 10 to 15 Mph with Gusts to 25 Mph. Chance of measurable precipitation 70 percent.

Tonight 12 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. A chance of Showers in the evening. Patchy fog in the Evening, then Areas of fog overnight. Colder. Lows 44 to 51. Areas of Winds southwest 10 Mph in the evening becoming light. Chance of measurable precipitation 50 percent.

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Etiwanda Temperature Statistics

October Temperature

Ontario International Airport (5.6 miles)

  • Lowest 1 October, 2026

    65.6 °F

  • Average October

    84.9 °F

  • Highest 5 October, 2026

    104.6 °F

Climate (2021–2026)

Ontario International Airport (5.6 miles)

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  • Average Low 2021–2026

    55.9 °F

  • Average 2021–2026

    67.3 °F

  • Average High 2021–2026

    79.4 °F
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