El Cajon City Park Weather Forecast

    • 46
    • 72

    Mostly Sunny

    • 47
    • 73

    Mostly Sunny

    • 49
    • 76

    Mostly Sunny

    • 52
    • 80

    Mostly Sunny

    • 53
    • 83

    Mostly Sunny

    • 53
    • 81

    Sunny

Today 5 Dec San Diego County Inland Valleys

Mostly sunny. Highs 68 to 73. Light Winds.

Tonight 5 Dec San Diego County Inland Valleys

Clear. Lows 41 to 47 in wind Sheltered Areas to 45 to 50 in warmer Locations. Light Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

El Cajon City Park Temperature Statistics

December Temperature

Gillespie Field Airport (1.9 miles)

  • Lowest 2 December, 2025

    41 °F

  • Average December

    53.8 °F

  • Highest 2 December, 2025

    69.8 °F

Climate (2020–Present)

Gillespie Field Airport (1.9 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    53 °F

  • Average 2020–2025

    60.1 °F

  • Average High 2020–2025

    75.8 °F
Get WillyWeather+ to remove ads