Jamul Weather Forecast

    • 44
    • 70

    Becoming Sunny

    • 47
    • 71

    Mostly Sunny

    • 47
    • 70

    Mostly Cloudy

    • 50
    • 73

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

    • 52
    • 78

    Mostly Sunny

Today 26 Jan San Diego County Inland Valleys

Partly cloudy. Highs 71 to 74 in the western Valleys to 63 to 68 near the Foothills. Areas of Winds east 10 to 20 Mph with Gusts to 30 Mph.

Tonight 26 Jan San Diego County Inland Valleys

Mostly clear. Lows 36 to 46 in wind Sheltered Areas to 41 to 49 in warmer Locations. Areas of Winds east 10 to 15 Mph. Gusts to 30 Mph. Becoming 25 Mph overnight.

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Jamul Temperature Statistics

January Temperature

Gillespie Field Airport (9.3 miles)

  • Lowest 10 January, 2026

    35.6 °F

  • Average January

    53.5 °F

  • Highest 14 January, 2026

    82.4 °F

Climate (2021–Present)

Gillespie Field Airport (9.3 miles)

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  • Average Low 2021–2026

    53.2 °F

  • Average 2021–2026

    60.2 °F

  • Average High 2021–2026

    75.8 °F
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