Jamul Weather Forecast

    • 73
    • 100

    Hot

    • 71
    • 100

    Hot

    • 70
    • 98

    Hot

    • 71
    • 96

    Sunny

    • 70
    • 94

    Mostly Sunny

    • 66
    • 92

    Mostly Sunny

Today 4 Oct San Diego County Inland Valleys

Sunny, hot. Highs 101 to 105 in the western Valleys to 93 to 98 near the Foothills. Areas of Winds east 15 to 25 Mph. Gusts to 40 Mph. Becoming 35 Mph this afternoon.

Tonight 4 Oct San Diego County Inland Valleys

Mostly clear. Lows 68 to 74. Areas of Winds east to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph overnight.

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Jamul Temperature Statistics

October Temperature

Gillespie Field Airport (9.3 miles)

  • Lowest 1 October, 2026

    60.8 °F

  • Average October

    74.6 °F

  • Highest 2 October, 2026

    104 °F

Climate (2021–2026)

Gillespie Field Airport (9.3 miles)

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  • Average Low 2021–2026

    53.6 °F

  • Average 2021–2026

    60.7 °F

  • Average High 2021–2026

    76.4 °F
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