El Cajon City Park Weather Forecast

    • 66
    • 87

    Decreasing Clouds

    • 67
    • 89

    Partly Sunny

    • 66
    • 90

    Mostly Sunny

    • 67
    • 90

    Mostly Sunny

    • 68
    • 90

    Mostly Sunny

    • 67
    • 89

    Mostly Sunny

Today 5 Aug San Diego County Inland Valleys

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs 82 to 86 in the western Valleys to 89 to 94 near the Foothills. Areas of Winds west to 10 Mph.

Tonight 5 Aug San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 62 to 66. 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 1 August, 2026

    68 °F

  • Average August

    74.2 °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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