El Cajon City Park Weather Forecast

    • 55
    • 82

    Partly Sunny

    • 55
    • 80

    Partly Sunny

    • 55
    • 78

    Mostly Sunny

    • 54
    • 78

    Mostly Sunny

    • 54
    • 75

    Partly Sunny

    • 54
    • 71

    Mostly Sunny

Today 21 May San Diego County Inland Valleys

Partly cloudy with patchy fog in the morning. Becoming sunny. Highs 80 to 85. Areas of Winds west to 10 Mph becoming 10 to 15 Mph with Gusts to 25 Mph in the afternoon.

Tonight 21 May San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 52 to 56. Areas of Winds west to 10 Mph in the evening becoming light.

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El Cajon City Park Temperature Statistics

May Temperature

Gillespie Field Airport (1.9 miles)

  • Lowest 6 May, 2026

    51.8 °F

  • Average May

    62.5 °F

  • Highest 11 May, 2026

    86 °F

Climate (2021–Present)

Gillespie Field Airport (1.9 miles)

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  • Average Low 2021–2026

    53.4 °F

  • Average 2021–2026

    60.5 °F

  • Average High 2021–2026

    76.2 °F
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