San Marcos Weather Forecast

    • 67
    • 88

    Mostly Sunny

    • 76
    • 102

    Mostly Sunny

    • 77
    • 102

    Hot

    • 76
    • 97

    Hot

    • 75
    • 98

    Mostly Sunny

    • 74
    • 97

    Sunny

Today 1 Oct San Diego County Inland Valleys

Mostly sunny. Highs 87 to 91 in the western Valleys to 90 to 95 near the Foothills. Light Winds becoming west 10 Mph this afternoon.

Tonight 1 Oct San Diego County Inland Valleys

Mostly clear. Lows 64 to 69. Areas of Winds east to 10 Mph.

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San Marcos Temperature Statistics

October Temperature

Carlsbad, McClellan-Palomar Airport (6.2 miles)

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Climate (2021–2026)

Carlsbad, McClellan-Palomar Airport (6.2 miles)

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  • Average Low 2021–2026

    57.2 °F

  • Average 2021–2026

    63.2 °F

  • Average High 2021–2026

    69.5 °F
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