El Cajon City Park Weather Forecast

    • 68
    • 91

    Increasing Clouds

    • 68
    • 91

    Partly Sunny

    • 67
    • 89

    Partly Sunny

    • 66
    • 88

    Partly Sunny

    • 65
    • 86

    Mostly Sunny

    • 65
    • 84

    Partly Sunny

Today 8 Aug San Diego County Inland Valleys

Patchy dense fog this morning. Mostly sunny. Highs 85 to 90 in the western Valleys to 93 to 98 near the Foothills. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 8 Aug San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy. Patchy dense fog overnight. Lows 64 to 70. Areas of Winds west to 10 Mph in the evening becoming light.

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El Cajon City Park Temperature Statistics

August Temperature

Gillespie Field Airport (1.9 miles)

  • Lowest 3 August, 2026

    66.2 °F

  • Average August

    72.8 °F

  • Highest 2 August, 2026

    93.2 °F

Climate (2021–2026)

Gillespie Field Airport (1.9 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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