El Cajon City Park Weather Forecast

    • 70
    • 99

    Hot

    • 69
    • 95

    Mostly Sunny

    • 72
    • 96

    Mostly Sunny

    • 74
    • 98

    Hot

    • 74
    • 102

    Hot

    • 75
    • 102

    Hot

Today 23 Aug San Diego County Inland Valleys

Mostly sunny. Highs 91 to 96 in the western Valleys to 98 to 103 near the Foothills. Areas of Winds west to 10 Mph.

Tonight 23 Aug San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy. Lows 66 to 72. 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

    73.9 °F

  • Highest 19 August, 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

    60.5 °F

  • Average High 2021–2026

    76.3 °F
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