Etiwanda Weather Forecast

    • 57
    • 71

    Breezy

    • 55
    • 76

    Breezy

    • 54
    • 81

    Sunny

    • 54
    • 79

    Sunny

    • 53
    • 77

    Mostly Sunny

    • 52
    • 76

    Partly Sunny

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

Mostly sunny. Highs 69 to 74. Areas of Winds east 15 to 25 Mph with Gusts to 45 Mph.

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

Clear. Lows 38 to 46 in wind Sheltered Areas to 43 to 53 in warmer Locations. Areas of Winds east 10 to 20 Mph becoming north 10 to 15 Mph overnight. Gusts to 40 Mph.

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Etiwanda Temperature Statistics

January Temperature

Ontario International Airport (5.6 miles)

  • Lowest 8 January, 2026

    46 °F

  • Average January

    56.3 °F

  • Highest 2 January, 2026

    66 °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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