San Carlos Weather Forecast

    • 63
    • 78

    Increasing Clouds

    • 63
    • 79

    Partly Sunny

    • 65
    • 82

    Patchy Fog

    • 67
    • 82

    Patchy Fog

    • 69
    • 85

    Patchy Fog

    • 69
    • 88

    Patchy Fog

Today 17 Aug San Diego County Inland Valleys

Partly cloudy this morning. Becoming mostly sunny. Highs 77 to 81 in the western Valleys to 82 to 87 near the Foothills. Light Winds becoming west 10 Mph this afternoon.

Tonight 17 Aug San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 56 to 61. Areas of Winds west to 10 Mph in the evening becoming light.

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San Carlos Temperature Statistics

August Temperature

Gillespie Field Airport (4.3 miles)

  • Lowest 3 August, 2025

    60.8 °F

  • Average August

    69.1 °F

  • Highest 7 August, 2025

    98.6 °F

Climate (2020–Present)

Gillespie Field Airport (4.3 miles)

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  • Average Low 2020–2025

    52.9 °F

  • Average 2020–2025

    60.2 °F

  • Average High 2020–2025

    76 °F
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