Barrett Junction Weather Forecast

    • 59
    • 85

    Mostly Cloudy

    • 55
    • 81

    Partly Sunny

    • 58
    • 83

    Mostly Sunny

    • 64
    • 91

    Mostly Sunny

    • 66
    • 93

    Sunny

    • 65
    • 93

    Mostly Sunny

    • 64
    • 92

    Mostly Sunny

Today 20 Sep San Diego County Inland Valleys

Partly cloudy. Highs 84 to 89.

Tonight 20 Sep San Diego County Inland Valleys

Partly cloudy this evening. Becoming mostly cloudy. Lows 55 to 63. Areas of Winds west to 10 Mph this evening becoming light.

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Barrett Junction Temperature Statistics

September Temperature

San Diego, Brown Field Municipal Airport (16.8 miles)

  • Lowest 3 September, 2026

    56.6 °F

  • Average September

    76.6 °F

  • Highest 9 September, 2026

    100.7 °F

Climate (2021–2026)

San Diego, Brown Field Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    54.3 °F

  • Average 2021–2026

    64 °F

  • Average High 2021–2026

    74.4 °F
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