Red Mountain Reservoir Weather Forecast

    • 53
    • 68

    Increasing Clouds

    • 56
    • 72

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 55
    • 77

    Patchy Fog

    • 55
    • 72

    Partly Sunny

    • 58
    • 75

    Mostly Sunny

    • 61
    • 83

    Mostly Sunny

Today 22 Oct San Diego County Inland Valleys

Mostly cloudy this morning. Becoming mostly sunny. Patchy fog this morning. Highs 70 to 73 in the western Valleys to 65 to 70 near the Foothills. Areas of Winds northwest to 10 Mph becoming west with Gusts to 25 Mph this afternoon.

Tonight 22 Oct San Diego County Inland Valleys

Partly cloudy this evening. Becoming mostly cloudy. Patchy fog overnight. Lows 48 to 55. Areas of Winds northwest 10 to 15 Mph with Gusts to 25 Mph this evening becoming light.

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Red Mountain Reservoir Temperature Statistics

October Temperature

Fallbrook Community Airpark (4.3 miles)

  • Lowest 14 October, 2025

    51.8 °F

  • Average October

    64 °F

  • Highest 18 October, 2025

    86 °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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