El Cajon City Park Weather Forecast

    • 57
    • 77

    Increasing Clouds

    • 59
    • 77

    Partly Sunny

    • 60
    • 79

    Partly Sunny

    • 64
    • 82

    Mostly Sunny

    • 64
    • 84

    Mostly Sunny

    • 63
    • 84

    Mostly Sunny

Today 20 Jun San Diego County Inland Valleys

Partly cloudy this morning. Becoming sunny. Highs 72 to 75 in the western Valleys to 74 to 79 near the Foothills. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 20 Jun San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 50 to 57. Areas of Winds northwest 10 to 15 Mph in the evening becoming light.

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El Cajon City Park Temperature Statistics

June Temperature

Gillespie Field Airport (1.9 miles)

  • Lowest 9 June, 2026

    55.4 °F

  • Average June

    66.8 °F

  • Highest 12 June, 2026

    93.2 °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

    76.2 °F
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