Sweetwater Dam Weather Forecast

    • 77
    • 102

    Mostly Sunny

    • 75
    • 95

    Mostly Sunny

    • 71
    • 90

    Mostly Sunny

    • 67
    • 85

    Partly Sunny

    • 65
    • 80

    Mostly Sunny

    • 64
    • 79

    Mostly Sunny

Today 8 Sep San Diego County Coastal Areas

Partly cloudy this morning. Becoming mostly sunny. Highs 83 to 88 near the coast to 92 to 97 inland. Areas of Winds northwest to 10 Mph becoming west with Gusts to 30 Mph this afternoon.

Tonight 8 Sep San Diego County Coastal Areas

Mostly clear in the evening. Becoming partly cloudy. Lows 73 to 76. Areas of Winds northwest 10 to 15 Mph with Gusts to 25 Mph in the evening becoming light.

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Sweetwater Dam Temperature Statistics

September Temperature

San Diego, Brown Field Municipal Airport (8.1 miles)

  • Lowest 3 September, 2026

    56.6 °F

  • Average September

    73.1 °F

  • Highest 6 September, 2026

    93 °F

Climate (2021–2026)

San Diego, Brown Field Municipal Airport (8.1 miles)

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  • Average Low 2021–2026

    54.3 °F

  • Average 2021–2026

    63.9 °F

  • Average High 2021–2026

    74.3 °F
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