El Capitan Reservoir Weather Forecast

    • 69
    • 96

    Mostly Sunny

    • 69
    • 96

    Mostly Sunny

    • 70
    • 96

    Mostly Sunny

    • 69
    • 97

    Hot

    • 69
    • 97

    Hot

    • 70
    • 98

    Hot

Today 20 Aug San Diego County Inland Valleys

Patchy fog this morning. Partly cloudy. Highs 86 to 90 in the western Valleys to 92 to 97 near the Foothills. Areas of Winds southwest to 10 Mph.

Tonight 20 Aug San Diego County Inland Valleys

Mostly clear. Lows 65 to 70. Areas of Winds southwest to 10 Mph in the evening becoming light.

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El Capitan Reservoir Temperature Statistics

August Temperature

Ramona, Ramona Airport (11.8 miles)

  • Lowest 3 August, 2026

    55.9 °F

  • Average August

    75.2 °F

  • Highest 2 August, 2026

    98.1 °F

Climate (2021–2026)

Ramona, Ramona Airport (11.8 miles)

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  • Average Low 2021–2026

    51.6 °F

  • Average 2021–2026

    64.6 °F

  • Average High 2021–2026

    76.8 °F
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