Alta Loma Weather Forecast

    • 55
    • 78

    Increasing Clouds

    • 56
    • 76

    Partly Sunny

    • 59
    • 80

    Partly Sunny

    • 63
    • 85

    Mostly Sunny

    • 63
    • 89

    Mostly Sunny

    • 63
    • 87

    Mostly Sunny

    • 62
    • 86

    Mostly Sunny

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

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs 80 to 88. Light Winds becoming west 10 to 15 Mph this afternoon.

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

Mostly clear this evening. Becoming mostly cloudy. Patchy fog overnight. Lows 49 to 57. Areas of Winds west 10 to 15 Mph this evening becoming light.

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Alta Loma Temperature Statistics

June Temperature

Ontario International Airport (4.3 miles)

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Climate (2019–Present)

Ontario International Airport (4.3 miles)

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  • Average Low 2019–2024

    55.6 °F

  • Average 2019–2024

    66.3 °F

  • Average High 2019–2024

    78.9 °F
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