San Carlos Weather Forecast

    • 64
    • 90

    Decreasing Clouds

    • 63
    • 88

    Mostly Sunny

    • 62
    • 84

    Mostly Sunny

    • 61
    • 75

    Rain Showers Likely

    • 61
    • 77

    Rain Showers Likely

    • 59
    • 71

    Chance Rain Showers

    • 57
    • 71

    Mostly Sunny

Today 17 Oct San Diego County Inland Valleys

Mostly sunny. Highs around 75 in the western Valleys to 67 to 72 near the Foothills.

Tonight 17 Oct San Diego County Inland Valleys

Mostly clear. Cooler. Lows 56 to 62. Areas of Winds east 10 to 20 Mph. Gusts to 35 Mph. Becoming 25 Mph overnight.

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San Carlos Temperature Statistics

October Temperature

Gillespie Field Airport (4.3 miles)

  • Lowest 14 October, 2026

    50 °F

  • Average October

    72.5 °F

  • Highest 3 October, 2026

    105.8 °F

Climate (2021–2026)

Gillespie Field Airport (4.3 miles)

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  • Average Low 2021–2026

    53.7 °F

  • Average 2021–2026

    60.7 °F

  • Average High 2021–2026

    76.5 °F
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