Etiwanda Weather Forecast

    • 57
    • 81

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 54
    • 80

    Mostly Sunny

    • 53
    • 79

    Mostly Sunny

    • 53
    • 76

    Mostly Sunny

    • 52
    • 74

    Mostly Sunny

Today 15 Jan San Bernardino and Riverside County Valleys-The Inland Empire

Sunny. Highs 77 to 83. Areas of Winds east 10 to 15 Mph with Gusts to 30 Mph.

Tonight 15 Jan San Bernardino and Riverside County Valleys-The Inland Empire

Clear. Lows 44 to 48 in wind Sheltered Areas to 49 to 55 in warmer Locations. Areas of Winds east 10 to 15 Mph with Gusts to 25 Mph.

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Etiwanda Temperature Statistics

January Temperature

Ontario International Airport (5.6 miles)

  • Lowest 11 January, 2026

    43 °F

  • Average January

    57.2 °F

  • Highest 13 January, 2026

    75.9 °F

Climate (2021–Present)

Ontario International Airport (5.6 miles)

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  • Average Low 2021–2026

    55.6 °F

  • Average 2021–2026

    66.6 °F

  • Average High 2021–2026

    78.9 °F
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