Etiwanda Weather Forecast

    • 55
    • 79

    Mostly Sunny

    • 50
    • 76

    Mostly Sunny

    • 49
    • 70

    Breezy

    • 52
    • 69

    Breezy

    • 56
    • 73

    Breezy

    • 56
    • 80

    Partly Sunny

Today 3 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 75 to 80. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 3 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear in the evening. Becoming partly cloudy. Lows 45 to 49 in wind Sheltered Areas to 49 to 55 in warmer Locations. Areas of Winds south to 10 Mph in the evening becoming light.

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Etiwanda Temperature Statistics

March Temperature

Ontario International Airport (5.6 miles)

  • Lowest 1 March, 2026

    59 °F

  • Average March

    69.6 °F

  • Highest 1 March, 2026

    82.9 °F

Climate (2021–Present)

Ontario International Airport (5.6 miles)

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  • Average Low 2021–2026

    55.7 °F

  • Average 2021–2026

    66.8 °F

  • Average High 2021–2026

    79.1 °F
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