El Cajon City Park Weather Forecast

    • 73
    • 96

    Partly Sunny

    • 74
    • 96

    Mostly Sunny

    • 73
    • 97

    Chance Rain Showers

    • 70
    • 94

    Mostly Sunny

    • 66
    • 90

    Mostly Sunny

    • 64
    • 86

    Mostly Sunny

Today 7 Sep San Diego County Inland Valleys

Partly cloudy this morning. Becoming mostly sunny. Highs 91 to 96. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 7 Sep San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy. Lows 68 to 73. Areas of Winds west to 10 Mph in the evening becoming light.

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  • Temperature Real-Time

El Cajon City Park Temperature Statistics

September Temperature

Gillespie Field Airport (1.9 miles)

  • Lowest 3 September, 2026

    57.2 °F

  • Average September

    69.6 °F

  • Highest 5 September, 2026

    95 °F

Climate (2021–2026)

Gillespie Field Airport (1.9 miles)

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  • Average Low 2021–2026

    53.5 °F

  • Average 2021–2026

    60.6 °F

  • Average High 2021–2026

    76.3 °F
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