San Marcos Weather Forecast

    • 65
    • 82

    Increasing Clouds

    • 65
    • 80

    Patchy Fog

    • 63
    • 79

    Partly Sunny

    • 62
    • 78

    Partly Sunny

    • 61
    • 76

    Partly Sunny

    • 59
    • 75

    Partly Sunny

Today 13 Jun San Diego County Inland Valleys

Mostly sunny. Highs 81 to 86 in the western Valleys to 87 to 92 near the Foothills. Areas of Winds west to 10 Mph becoming 10 to 15 Mph this afternoon.

Tonight 13 Jun San Diego County Inland Valleys

Mostly clear this evening. Becoming partly cloudy. Patchy fog overnight. Lows 61 to 65. Areas of Winds west to 10 Mph this evening becoming light.

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  • Temperature Real-Time

San Marcos Temperature Statistics

June Temperature

Carlsbad, McClellan-Palomar Airport (6.2 miles)

  • Lowest 2 June, 2026

    60.7 °F

  • Average June

    66 °F

  • Highest 9 June, 2026

    71.7 °F

Climate (2021–Present)

Carlsbad, McClellan-Palomar Airport (6.2 miles)

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  • Average Low 2021–2026

    57 °F

  • Average 2021–2026

    62.9 °F

  • Average High 2021–2026

    69.2 °F
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