Cerro De Las Posas Park Weather Forecast

    • 61
    • 79

    Mostly Sunny

    • 65
    • 80

    Mostly Sunny

    • 66
    • 84

    Mostly Sunny

    • 68
    • 89

    Mostly Sunny

    • 72
    • 92

    Mostly Sunny

    • 73
    • 95

    Sunny

    • 75
    • 97

    Sunny

Today 28 Sep San Diego County Inland Valleys

Mostly sunny. Hot. Highs around 100 in the western Valleys to 91 to 96 near the Foothills.

Tonight 28 Sep San Diego County Inland Valleys

Mostly clear. Cooler. Lows 52 to 59. Areas of Winds west to 10 Mph this evening becoming light.

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Cerro De Las Posas Park Temperature Statistics

September Temperature

Carlsbad, McClellan-Palomar Airport (5 miles)

  • Lowest 3 September, 2026

    62.7 °F

  • Average September

    74.5 °F

  • Highest 7 September, 2026

    99.6 °F

Climate (2021–2026)

Carlsbad, McClellan-Palomar Airport (5 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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