Alta Loma Weather Forecast

    • 54
    • 73

    Mostly Sunny

    • 58
    • 81

    Mostly Sunny

    • 59
    • 83

    Sunny

    • 60
    • 86

    Mostly Sunny

    • 60
    • 87

    Partly Sunny

    • 56
    • 78

    Partly Sunny

Today 6 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy with patchy fog in the morning. Becoming sunny. Highs 71 to 75. Light Winds becoming west 10 Mph in the afternoon.

Tonight 6 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows around 50 in wind Sheltered Areas to 49 to 55 in warmer Locations. Light Winds.

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Alta Loma Temperature Statistics

November Temperature

Ontario International Airport (4.3 miles)

  • Lowest 2 November, 2025

    53.1 °F

  • Average November

    66 °F

  • Highest 1 November, 2025

    84.9 °F

Climate (2020–Present)

Ontario International Airport (4.3 miles)

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  • Average Low 2020–2025

    55.4 °F

  • Average 2020–2025

    66.5 °F

  • Average High 2020–2025

    78.9 °F
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