La Mesa Weather Forecast

    • 66
    • 83

    Decreasing Clouds

    • 65
    • 83

    Partly Sunny

    • 66
    • 85

    Partly Sunny

    • 68
    • 90

    Partly Sunny

    • 68
    • 93

    Partly Sunny

    • 67
    • 91

    Partly Sunny

Today 28 Jul San Diego County Inland Valleys

Partly cloudy with patchy fog in the morning. Becoming mostly sunny. Highs 84 to 89 in the western Valleys to 90 to 95 near the Foothills. Areas of Winds west to 10 Mph.

Tonight 28 Jul San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy. Lows 62 to 67. Areas of Winds southwest to 10 Mph in the 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

    71.7 °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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