El Cajon City Park Weather Forecast

    • 62
    • 84

    Mostly Sunny

    • 63
    • 87

    Mostly Sunny

    • 67
    • 93

    Mostly Sunny

    • 70
    • 97

    Hot

    • 72
    • 101

    Hot

    • 73
    • 101

    Hot

Today 29 Sep San Diego County Inland Valleys

Sunny. Highs 81 to 86. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 30 Mph this afternoon.

Tonight 29 Sep San Diego County Inland Valleys

Clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 58 to 63. Areas of Winds south 10 to 15 Mph with Gusts to 25 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

    75.7 °F

  • Highest 9 September, 2026

    107.6 °F

Climate (2021–2026)

Gillespie Field Airport (1.9 miles)

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  • Average Low 2021–2026

    53.6 °F

  • Average 2021–2026

    60.7 °F

  • Average High 2021–2026

    76.3 °F
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