Red Mountain Reservoir Weather Forecast

    • 50
    • 71

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

    • 55
    • 78

    Mostly Sunny

    • 55
    • 82

    Mostly Sunny

    • 54
    • 80

    Sunny

    • 54
    • 80

    Mostly Sunny

    • 54
    • 80

    Mostly Sunny

Today 6 Dec San Diego County Inland Valleys

Sunny. Highs 69 to 74. Light Winds becoming west 10 Mph this afternoon.

Tonight 6 Dec San Diego County Inland Valleys

Mostly clear. Lows 43 to 49 in wind Sheltered Areas to 47 to 52 in warmer Locations. Light Winds becoming northeast to 10 Mph overnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Red Mountain Reservoir Temperature Statistics

December Temperature

Fallbrook Community Airpark (4.3 miles)

  • Lowest 1 December, 2025

    46.4 °F

  • Average December

    57 °F

  • Highest 4 December, 2025

    71.6 °F

Climate (2020–Present)

Fallbrook Community Airpark (4.3 miles)

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  • Average Low 2020–2025

    53.4 °F

  • Average 2020–2025

    61.7 °F

  • Average High 2020–2025

    74.1 °F
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