Santee Recreational Lakes Weather Forecast

    • 66
    • 88

    Decreasing Clouds

    • 69
    • 91

    Mostly Sunny

    • 69
    • 91

    Partly Sunny

    • 69
    • 91

    Mostly Sunny

    • 68
    • 90

    Partly Sunny

    • 66
    • 88

    Partly Sunny

Today 20 Aug San Diego County Inland Valleys

Partly cloudy this morning. Becoming mostly sunny. Highs 83 to 88 in the western Valleys to 92 to 97 near the Foothills. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph this afternoon.

Tonight 20 Aug San Diego County Inland Valleys

Partly cloudy. Lows 65 to 70. Light Winds.

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Santee Recreational Lakes Temperature Statistics

August Temperature

Gillespie Field Airport (1.9 miles)

  • Lowest 3 August, 2025

    60.8 °F

  • Average August

    68.9 °F

  • Highest 7 August, 2025

    98.6 °F

Climate (2020–Present)

Gillespie Field Airport (1.9 miles)

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  • Average Low 2020–2025

    52.9 °F

  • Average 2020–2025

    60.2 °F

  • Average High 2020–2025

    76 °F
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