Sweetwater Summit Regional Park Weather Forecast

    • 51
    • 73

    Mostly Sunny

    • 53
    • 74

    Mostly Sunny

    • 55
    • 76

    Mostly Sunny

    • 56
    • 79

    Patchy Fog

    • 54
    • 78

    Mostly Cloudy

    • 53
    • 72

    Patchy Fog

Today 15 Dec San Diego County Coastal Areas

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Local visibility one quarter mile or less at Times this morning. Highs 64 to 68 near the coast to 69 to 73 inland. Light Winds becoming northwest 10 Mph this afternoon.

Tonight 15 Dec San Diego County Coastal Areas

Partly cloudy. Patchy fog overnight. Lows 47 to 52. Light Winds.

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Sweetwater Summit Regional Park Temperature Statistics

December Temperature

San Diego, Brown Field Municipal Airport (7.5 miles)

  • Lowest 5 December, 2025

    43 °F

  • Average December

    59.7 °F

  • Highest 10 December, 2025

    86 °F

Climate (2020–Present)

San Diego, Brown Field Municipal Airport (7.5 miles)

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  • Average Low 2020–2025

    54.1 °F

  • Average 2020–2025

    63.4 °F

  • Average High 2020–2025

    73.8 °F
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