San Diego Botanic Garden Weather Forecast

    • 63
    • 73

    Increasing Clouds

    • 63
    • 74

    Increasing Clouds

    • 65
    • 73

    Mostly Cloudy

    • 63
    • 72

    Partly Sunny

    • 65
    • 73

    Mostly Sunny

    • 66
    • 77

    Partly Sunny

    • 68
    • 78

    Partly Sunny

Today 18 Sep San Diego County Coastal Areas

Partly cloudy. Highs 78 to 83 near the coast to 84 to 87 inland.

Tonight 18 Sep San Diego County Coastal Areas

Mostly clear this evening. Becoming partly cloudy. Lows 59 to 64. Areas of Winds northwest to 10 Mph this evening becoming light.

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San Diego Botanic Garden Temperature Statistics

September Temperature

Carlsbad, McClellan-Palomar Airport (5 miles)

  • Lowest 3 September, 2026

    62.7 °F

  • Average September

    76 °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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