El Cajon City Park Weather Forecast

    • 68
    • 91

    Mostly Sunny

    • 66
    • 89

    Slight Chance Thunderstorms

    • 65
    • 87

    Partly Sunny

    • 64
    • 88

    Partly Sunny

    • 65
    • 88

    Partly Sunny

    • 64
    • 87

    Mostly Sunny

    • 65
    • 87

    Mostly Sunny

Today 24 Aug San Diego County Inland Valleys

Partly cloudy. A slight chance of Showers and Thunderstorms this afternoon. Highs 86 to 91 in the western Valleys to 92 to 97 near the Foothills. Areas of Winds west to 10 Mph. Chance of measurable precipitation 20 percent.

Tonight 24 Aug San Diego County Inland Valleys

Mostly clear this evening. Becoming partly cloudy. Lows 65 to 71. Light Winds.

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El Cajon City Park Temperature Statistics

August Temperature

Gillespie Field Airport (1.9 miles)

  • Lowest 19 August, 2025

    59 °F

  • Average August

    69.7 °F

  • Highest 7 August, 2025

    98.6 °F

Climate (2020–Present)

Gillespie Field Airport (1.9 miles)

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  • Average Low 2020–2025

    52.9 °F

  • Average 2020–2025

    60.1 °F

  • Average High 2020–2025

    76 °F
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