El Cajon Weather Forecast

    • 55
    • 85

    Mostly Sunny

    • 55
    • 86

    Mostly Sunny

    • 55
    • 88

    Mostly Sunny

    • 56
    • 88

    Mostly Sunny

    • 58
    • 90

    Partly Sunny

    • 58
    • 90

    Partly Sunny

Today 23 Mar San Diego County Inland Valleys

Mostly sunny. Highs 82 to 87. Light Winds becoming west 10 Mph in the afternoon.

Tonight 23 Mar San Diego County Inland Valleys

Mostly clear. Lows 52 to 58 in wind Sheltered Areas to 55 to 63 in warmer Locations. Light Winds.

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El Cajon Temperature Statistics

March Temperature

Gillespie Field Airport (1.9 miles)

  • Lowest 6 March, 2026

    41 °F

  • Average March

    60.3 °F

  • Highest 20 March, 2026

    100.4 °F

Climate (2021–Present)

Gillespie Field Airport (1.9 miles)

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  • Average Low 2021–2026

    53.3 °F

  • Average 2021–2026

    60.4 °F

  • Average High 2021–2026

    76.1 °F
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