El Cajon City Park Weather Forecast

    • 49
    • 80

    Mostly Sunny

    • 48
    • 84

    Sunny

    • 48
    • 82

    Mostly Sunny

    • 50
    • 81

    Mostly Sunny

    • 48
    • 81

    Mostly Sunny

    • 52
    • 79

    Partly Sunny

Today 8 Dec San Diego County Inland Valleys

Mostly sunny. Highs 76 to 81. Areas of Winds east to 10 Mph becoming northwest with Gusts to 30 Mph in the afternoon.

Tonight 8 Dec San Diego County Inland Valleys

Clear. Lows 48 to 52 in wind Sheltered Areas to 49 to 56 in warmer Locations. Areas of Winds east 10 to 15 Mph with Gusts to 30 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

    54.2 °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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