Del Rosa Weather Forecast

    • 56
    • 80

    Sunny

    • 58
    • 85

    Mostly Sunny

    • 55
    • 81

    Mostly Sunny

    • 55
    • 78

    Partly Sunny

    • 54
    • 77

    Partly Sunny

    • 52
    • 77

    Mostly Cloudy

    • 52
    • 72

    Chance Rain Showers

Today 17 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy this morning. Becoming sunny. Areas of fog this morning. Local visibility one quarter mile or less at Times this morning. Highs 76 to 79. Light Winds becoming west 10 Mph this afternoon.

Tonight 17 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 46 to 50 in wind Sheltered Areas to 51 to 58 in warmer Locations. Areas of Winds southeast 10 Mph becoming north overnight.

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Del Rosa Temperature Statistics

December Temperature

San Bernardino Intl. Airport (3.7 miles)

  • Lowest 4 December, 2025

    40.3 °F

  • Average December

    57.9 °F

  • Highest 10 December, 2025

    87.8 °F

Climate (2020–Present)

San Bernardino Intl. Airport (3.7 miles)

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  • Average Low 2020–2025

    54.1 °F

  • Average 2020–2025

    63 °F

  • Average High 2020–2025

    80.3 °F
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