Jamul Weather Forecast

    • 61
    • 85

    Mostly Sunny

    • 61
    • 84

    Partly Sunny

    • 59
    • 83

    Mostly Cloudy

    • 59
    • 82

    Mostly Sunny

Today 31 Aug San Diego County Inland Valleys

Mostly sunny. Highs 85 to 90. Areas of Winds southwest to 10 Mph becoming west with Gusts to 25 Mph this afternoon.

Tonight 31 Aug San Diego County Inland Valleys

Mostly clear this evening. Becoming partly cloudy. Lows 58 to 63. 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

    75.4 °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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