San Marcos Weather Forecast

    • 59
    • 77

    Gradual Clearing

    • 60
    • 80

    Partly Sunny

    • 61
    • 82

    Partly Sunny

    • 61
    • 81

    Patchy Fog

    • 60
    • 79

    Patchy Fog

    • 59
    • 79

    Patchy Fog

Today 26 Jun San Diego County Inland Valleys

Partly cloudy with patchy fog this morning. Becoming sunny. Highs 76 to 80 in the western Valleys to 84 to 89 near the Foothills. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph this afternoon.

Tonight 26 Jun San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 53 to 60. Areas of Winds west to 10 Mph in the evening becoming light.

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San Marcos Temperature Statistics

June Temperature

Carlsbad, McClellan-Palomar Airport (6.2 miles)

  • Lowest 23 June, 2025

    57 °F

  • Average June

    65.5 °F

  • Highest 1 June, 2025

    81.6 °F

Climate (2020–Present)

Carlsbad, McClellan-Palomar Airport (6.2 miles)

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  • Average Low 2020–2025

    56.6 °F

  • Average 2020–2025

    62.5 °F

  • Average High 2020–2025

    68.9 °F
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