Arnold Reservoir Weather Forecast

    • 51
    • 70

    Patchy Fog

    • 55
    • 65

    Rain Showers

    • 53
    • 61

    Rain Showers

    • 50
    • 62

    Rain Showers

    • 44
    • 59

    Rain Showers Likely

    • 43
    • 59

    Slight Chance Rain Showers

    • 44
    • 62

    Partly Sunny

Today 22 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Areas of fog this morning. Mostly cloudy. Local visibility one quarter mile or less at Times this morning. Highs 72 to 77. Light Winds becoming west to 10 Mph this afternoon.

Tonight 22 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy this evening. Becoming cloudy. Lows 46 to 49 in wind Sheltered Areas to 49 to 54 in warmer Locations. Light Winds.

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  • Temperature Real-Time

Arnold Reservoir Temperature Statistics

December Temperature

Brackett Field Airport (6.8 miles)

  • Lowest 5 December, 2025

    42.8 °F

  • Average December

    63.7 °F

  • Highest 10 December, 2025

    86 °F

Climate (2020–Present)

Brackett Field Airport (6.8 miles)

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  • Average Low 2020–2025

    55.5 °F

  • Average 2020–2025

    67.6 °F

  • Average High 2020–2025

    75.6 °F
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