La Mesa Weather Forecast

    • 50
    • 72

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

    • 52
    • 81

    Sunny

    • 51
    • 78

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

    • 51
    • 78

    Mostly Sunny

    • 53
    • 74

    Partly Sunny

Today 7 Dec San Diego County Inland Valleys

Sunny. Highs 72 to 77. Areas of Winds east to 10 Mph becoming west 10 Mph this afternoon.

Tonight 7 Dec San Diego County Inland Valleys

Patchy dense fog this evening. Mostly clear. Local visibility one quarter mile or less at Times this evening. Lows 46 to 53. Light Winds becoming northeast to 10 Mph overnight.

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La Mesa Temperature Statistics

December Temperature

Gillespie Field Airport (5 miles)

  • Lowest 5 December, 2025

    39.2 °F

  • Average December

    54.2 °F

  • Highest 4 December, 2025

    73.4 °F

Climate (2020–Present)

Gillespie Field Airport (5 miles)

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  • Average Low 2020–2025

    53 °F

  • Average 2020–2025

    60.1 °F

  • Average High 2020–2025

    75.7 °F
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