Rancho Mira Loma Park Weather Forecast

    • 61
    • 84

    Increasing Clouds

    • 62
    • 78

    Rain Showers

    • 55
    • 69

    Rain Showers

    • 54
    • 73

    Sunny

    • 56
    • 78

    Mostly Sunny

    • 57
    • 80

    Partly Sunny

    • 57
    • 81

    Mostly Sunny

Today 20 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy in the morning. Becoming mostly sunny. Highs 75 to 81.

Tonight 20 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. Patchy fog overnight. Lows 55 to 60. Areas of Winds south to 10 Mph this evening becoming light.

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Rancho Mira Loma Park Temperature Statistics

October Temperature

Ontario International Airport (3.7 miles)

  • Lowest 14 October, 2026

    52.6 °F

  • Average October

    79.1 °F

  • Highest 5 October, 2026

    104.6 °F

Climate (2021–2026)

Ontario International Airport (3.7 miles)

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  • Average Low 2021–2026

    55.9 °F

  • Average 2021–2026

    67.3 °F

  • Average High 2021–2026

    79.4 °F
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