El Cajon Weather Forecast

    • 54
    • 75

    Partly Sunny

    • 54
    • 74

    Partly Sunny

    • 53
    • 73

    Partly Sunny

    • 53
    • 77

    Mostly Sunny

    • 54
    • 79

    Partly Sunny

    • 55
    • 81

    Mostly Sunny

Today 15 May San Diego County Inland Valleys

Mostly cloudy this morning. Becoming mostly sunny. Patchy fog this morning. Highs 70 to 75. Areas of Winds southwest to 10 Mph becoming west this afternoon.

Tonight 15 May San Diego County Inland Valleys

Partly cloudy this Evening, then cloudy with patchy fog and drizzle overnight. Lows 50 to 54. Areas of Winds southwest to 10 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

El Cajon Temperature Statistics

May Temperature

Gillespie Field Airport (1.9 miles)

  • Lowest 6 May, 2026

    51.8 °F

  • Average May

    62.2 °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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