Jamul Weather Forecast

    • 65
    • 88

    Mostly Sunny

    • 68
    • 91

    Partly Sunny

    • 64
    • 84

    Partly Sunny

    • 61
    • 78

    Slight Chance Rain Showers

    • 64
    • 85

    Mostly Sunny

    • 65
    • 88

    Sunny

Today 25 Sep San Diego County Inland Valleys

Mostly sunny. Highs 87 to 92. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph in the afternoon.

Tonight 25 Sep San Diego County Inland Valleys

Partly cloudy. Patchy fog overnight. Lows 62 to 67. Areas of Winds west to 10 Mph in the evening becoming light.

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  • Temperature Real-Time

Jamul Temperature Statistics

September Temperature

Gillespie Field Airport (9.3 miles)

  • Lowest 3 September, 2026

    57.2 °F

  • Average September

    75.7 °F

  • Highest 9 September, 2026

    107.6 °F

Climate (2021–2026)

Gillespie Field Airport (9.3 miles)

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  • Average Low 2021–2026

    53.6 °F

  • Average 2021–2026

    60.6 °F

  • Average High 2021–2026

    76.3 °F
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