Etiwanda Weather Forecast

    • 70
    • 98

    Hot

    • 72
    • 99

    Hot

    • 67
    • 98

    Hot

    • 64
    • 93

    Partly Sunny

    • 63
    • 88

    Partly Sunny

    • 63
    • 89

    Mostly Sunny

Today 18 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Sunny, hot. Highs 94 to 100. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph in the afternoon.

Tonight 18 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Clear. Lows 59 to 63 in wind Sheltered Areas to 62 to 70 in warmer Locations. Areas of Winds west 10 to 15 Mph with Gusts to 25 Mph in the evening becoming light.

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Etiwanda Temperature Statistics

March Temperature

Ontario International Airport (5.6 miles)

  • Lowest 6 March, 2026

    51.1 °F

  • Average March

    67 °F

  • Highest 12 March, 2026

    91 °F

Climate (2021–Present)

Ontario International Airport (5.6 miles)

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  • Average Low 2021–2026

    55.7 °F

  • Average 2021–2026

    66.9 °F

  • Average High 2021–2026

    79.2 °F
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