Etiwanda Weather Forecast

    • 51
    • 71

    Increasing Clouds

    • 51
    • 73

    Becoming Sunny

    • 54
    • 78

    Sunny

    • 55
    • 81

    Mostly Sunny

    • 56
    • 81

    Partly Sunny

    • 53
    • 77

    Partly Sunny

    • 50
    • 72

    Partly Sunny

Today 27 Jan San Bernardino and Riverside County Valleys-The Inland Empire

Sunny. Highs 69 to 74. Areas of Winds east 10 to 15 Mph with Gusts to 25 Mph becoming west this afternoon.

Tonight 27 Jan San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. Lows 41 to 44 in wind Sheltered Areas to 44 to 51 in warmer Locations. Light Winds.

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Etiwanda Temperature Statistics

January Temperature

Ontario International Airport (5.6 miles)

  • Lowest 11 January, 2026

    39.7 °F

  • Average January

    59.5 °F

  • Highest 14 January, 2026

    84.7 °F

Climate (2021–Present)

Ontario International Airport (5.6 miles)

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  • Average Low 2021–2026

    55.6 °F

  • Average 2021–2026

    66.7 °F

  • Average High 2021–2026

    79 °F
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