Sweetwater Summit Regional Park Weather Forecast

    • 73
    • 91

    Partly Sunny

    • 74
    • 91

    Mostly Sunny

    • 72
    • 91

    Slight Chance Rain Showers

    • 70
    • 88

    Mostly Sunny

    • 68
    • 85

    Partly Sunny

    • 65
    • 81

    Mostly Sunny

Today 7 Sep San Diego County Coastal Areas

Partly cloudy this morning. Becoming mostly sunny. Highs 81 to 86 near the coast to 89 to 93 inland. Areas of Winds northwest to 10 Mph becoming west this afternoon.

Tonight 7 Sep San Diego County Coastal Areas

Partly cloudy. Lows 70 to 73. Areas of Winds northwest 10 to 15 Mph in the evening becoming light.

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  • Temperature Real-Time

Sweetwater Summit Regional Park Temperature Statistics

September Temperature

San Diego, Brown Field Municipal Airport (7.5 miles)

  • Lowest 3 September, 2026

    56.6 °F

  • Average September

    71.4 °F

  • Highest 5 September, 2026

    89.1 °F

Climate (2021–2026)

San Diego, Brown Field Municipal Airport (7.5 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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