Harbison Canyon Weather Forecast

    • 69
    • 94

    Increasing Clouds

    • 64
    • 86

    Cloudy

    • 56
    • 80

    Mostly Sunny

    • 65
    • 85

    Mostly Sunny

    • 66
    • 91

    Mostly Sunny

    • 66
    • 92

    Mostly Sunny

    • 67
    • 92

    Mostly Sunny

Today 26 Sep San Diego County Inland Valleys

Mostly sunny. Highs 91 to 96.

Tonight 26 Sep San Diego County Inland Valleys

Mostly cloudy. Lows 66 to 70. Light Winds.

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  • Temperature Real-Time

Harbison Canyon Temperature Statistics

September Temperature

Gillespie Field Airport (8.1 miles)

  • Lowest 3 September, 2026

    57.2 °F

  • Average September

    75.7 °F

  • Highest 9 September, 2026

    107.6 °F

Climate (2021–2026)

Gillespie Field Airport (8.1 miles)

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  • Average Low 2021–2026

    53.6 °F

  • Average 2021–2026

    60.6 °F

  • Average High 2021–2026

    76.3 °F
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