Jamul Weather Forecast

    • 69
    • 94

    Becoming Sunny

    • 66
    • 92

    Mostly Sunny

    • 63
    • 87

    Mostly Sunny

    • 63
    • 85

    Mostly Sunny

    • 65
    • 85

    Partly Sunny

    • 65
    • 86

    Mostly Cloudy

    • 64
    • 87

    Mostly Sunny

Today 28 Aug San Diego County Inland Valleys

Partly cloudy this morning. Becoming mostly sunny. Highs 97 to 102. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 28 Aug San Diego County Inland Valleys

Clear. Lows 67 to 73. Areas of Winds west to 10 Mph this evening becoming light.

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Jamul Temperature Statistics

August Temperature

Gillespie Field Airport (9.3 miles)

  • Lowest 3 August, 2026

    66.2 °F

  • Average August

    74.8 °F

  • Highest 23 August, 2026

    100.4 °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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