Harbison Canyon Weather Forecast

    • 64
    • 89

    Decreasing Clouds

    • 63
    • 87

    Partly Sunny

    • 61
    • 85

    Partly Sunny

    • 59
    • 82

    Partly Sunny

    • 60
    • 82

    Partly Sunny

    • 61
    • 83

    Partly Sunny

Today 10 Aug San Diego County Inland Valleys

Mostly sunny this Morning, then partly cloudy with a slight chance of Showers and Thunderstorms this afternoon. Highs 84 to 88 in the western Valleys to 88 to 93 near the Foothills. Areas of Winds west to 10 Mph. Chance of measurable precipitation 20 percent.

Tonight 10 Aug San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 63 to 67. Areas of Winds west to 10 Mph in the evening becoming light.

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Harbison Canyon Temperature Statistics

August Temperature

Gillespie Field Airport (8.1 miles)

  • Lowest 3 August, 2026

    66.2 °F

  • Average August

    73.8 °F

  • Highest 2 August, 2026

    93.2 °F

Climate (2021–2026)

Gillespie Field Airport (8.1 miles)

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  • Average Low 2021–2026

    53.5 °F

  • Average 2021–2026

    60.5 °F

  • Average High 2021–2026

    76.2 °F
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