La Mesa Weather Forecast

    • 66
    • 84

    Patchy Fog

    • 67
    • 86

    Partly Sunny

    • 67
    • 85

    Mostly Sunny

    • 67
    • 84

    Partly Sunny

    • 68
    • 87

    Partly Sunny

    • 66
    • 85

    Partly Sunny

    • 67
    • 86

    Mostly Sunny

Today 19 Jul San Diego County Inland Valleys

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs 82 to 87 in the western Valleys to 87 to 92 near the Foothills. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 19 Jul San Diego County Inland Valleys

Partly cloudy. Patchy fog overnight. Lows 62 to 66. Areas of Winds west to 10 Mph this evening becoming light.

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La Mesa Temperature Statistics

July Temperature

Gillespie Field Airport (5 miles)

  • Lowest 2 July, 2026

    60.8 °F

  • Average July

    70.3 °F

  • Highest 15 July, 2026

    93.2 °F

Climate (2021–2026)

Gillespie Field Airport (5 miles)

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  • Average Low 2021–2026

    53.5 °F

  • Average 2021–2026

    60.5 °F

  • Average High 2021–2026

    76.2 °F
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