San Carlos Weather Forecast

    • 60
    • 73

    Rain Showers

    • 56
    • 69

    Rain Showers

    • 57
    • 73

    Mostly Sunny

    • 58
    • 77

    Mostly Sunny

    • 58
    • 75

    Partly Sunny

    • 58
    • 76

    Partly Sunny

    • 58
    • 77

    Mostly Sunny

Today 31 Oct San Diego County Inland Valleys

Mostly sunny. Highs 81 to 84 in the western Valleys to 73 to 78 near the Foothills.

Tonight 31 Oct San Diego County Inland Valleys

Rain. Rain may be heavy at Times overnight. Lows 53 to 59. Light Winds.

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San Carlos Temperature Statistics

October Temperature

Gillespie Field Airport (4.3 miles)

  • Lowest 14 October, 2026

    50 °F

  • Average October

    69.7 °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

    60.8 °F

  • Average High 2021–2026

    76.5 °F
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