Alta Loma Weather Forecast

    • 54
    • 82

    Mostly Sunny

    • 50
    • 71

    Mostly Sunny

    • 53
    • 75

    Mostly Sunny

    • 51
    • 77

    Mostly Sunny

    • 52
    • 76

    Sunny

    • 53
    • 75

    Mostly Sunny

Today 1 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 80 to 85. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph in the afternoon.

Tonight 1 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows around 50 in wind Sheltered Areas to 50 to 56 in warmer Locations. Areas of Winds west to 10 Mph in the evening becoming light.

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Alta Loma Temperature Statistics

March Temperature

Ontario International Airport (4.3 miles)

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Climate (2021–Present)

Ontario International Airport (4.3 miles)

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  • Average Low 2021–2026

    55.6 °F

  • Average 2021–2026

    66.7 °F

  • Average High 2021–2026

    79.1 °F
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