La Mesa Weather Forecast

    • 51
    • 79

    Mostly Sunny

    • 52
    • 81

    Partly Sunny

    • 52
    • 80

    Partly Sunny

    • 51
    • 77

    Mostly Cloudy

    • 50
    • 75

    Partly Sunny

    • 50
    • 72

    Partly Sunny

Today 16 Jan San Diego County Inland Valleys

Sunny. Highs 78 to 83. Areas of Winds northeast to 10 Mph becoming west 10 Mph this afternoon.

Tonight 16 Jan San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy. Lows 45 to 53 in wind Sheltered Areas to 49 to 56 in warmer Locations. Areas of Winds east 10 to 15 Mph. Gusts to 25 Mph overnight.

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La Mesa Temperature Statistics

January Temperature

Gillespie Field Airport (5 miles)

  • Lowest 10 January, 2026

    35.6 °F

  • Average January

    53.4 °F

  • Highest 14 January, 2026

    82.4 °F

Climate (2021–Present)

Gillespie Field Airport (5 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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