Jamul Weather Forecast

    • 73
    • 101

    Hot

    • 69
    • 94

    Mostly Sunny

    • 64
    • 89

    Mostly Sunny

    • 61
    • 84

    Mostly Sunny

    • 59
    • 83

    Sunny

    • 57
    • 81

    Mostly Sunny

    • 57
    • 80

    Mostly Sunny

Today 9 Sep San Diego County Inland Valleys

Mostly sunny this Morning, then partly cloudy with a slight chance of Showers this afternoon. Hot. Highs 100 to 105. Areas of Winds southwest to 10 Mph becoming west this afternoon. Chance of measurable precipitation 20 percent.

Tonight 9 Sep San Diego County Inland Valleys

Mostly clear this evening. Becoming partly cloudy. Lows 72 to 77. Areas of Winds west to 10 Mph this evening becoming light.

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Jamul Temperature Statistics

September Temperature

Gillespie Field Airport (9.3 miles)

  • Lowest 3 September, 2026

    57.2 °F

  • Average September

    73.3 °F

  • Highest 7 September, 2026

    102.2 °F

Climate (2021–2026)

Gillespie Field Airport (9.3 miles)

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  • Average Low 2021–2026

    53.5 °F

  • Average 2021–2026

    60.6 °F

  • Average High 2021–2026

    76.3 °F
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