Rancho Mira Loma Park Weather Forecast

    • 43
    • 70

    Sunny

    • 45
    • 70

    Sunny

    • 48
    • 71

    Sunny

    • 50
    • 75

    Mostly Sunny

    • 52
    • 78

    Mostly Sunny

    • 53
    • 80

    Mostly Sunny

Today 4 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 65 to 71. Areas of Winds north 10 to 20 Mph. Gusts to 35 Mph. Becoming 30 Mph in the afternoon.

Tonight 4 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows around 36 in wind Sheltered Areas to 37 to 45 in warmer Locations. Areas of Winds north 10 to 15 Mph with Gusts to 25 Mph becoming east overnight.

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Rancho Mira Loma Park Temperature Statistics

December Temperature

Ontario International Airport (3.7 miles)

  • Lowest 2 December, 2025

    46 °F

  • Average December

    57.2 °F

  • Highest 1 December, 2025

    73 °F

Climate (2020–Present)

Ontario International Airport (3.7 miles)

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  • Average Low 2020–2025

    55.5 °F

  • Average 2020–2025

    66.6 °F

  • Average High 2020–2025

    78.9 °F
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