El Cajon City Park Weather Forecast

    • 54
    • 84

    Sunny

    • 53
    • 83

    Mostly Sunny

    • 52
    • 81

    Mostly Sunny

    • 51
    • 79

    Mostly Sunny

    • 49
    • 76

    Patchy Fog

    • 48
    • 74

    Patchy Fog

Today 9 Dec San Diego County Inland Valleys

Sunny. Highs 82 to 86 in the western Valleys to 75 to 80 near the Foothills. Areas of Winds east 10 to 15 Mph with Gusts to 25 Mph becoming west this afternoon.

Tonight 9 Dec San Diego County Inland Valleys

Clear. Lows 40 to 50. Areas of Winds east 10 Mph.

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El Cajon City Park Temperature Statistics

December Temperature

Gillespie Field Airport (1.9 miles)

  • Lowest 5 December, 2025

    39.2 °F

  • Average December

    53.4 °F

  • Highest 4 December, 2025

    73.4 °F

Climate (2020–Present)

Gillespie Field Airport (1.9 miles)

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  • Average Low 2020–2025

    53 °F

  • Average 2020–2025

    60.1 °F

  • Average High 2020–2025

    75.7 °F
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