Lake Cuyamaca Weather Forecast

    • 64
    • 85

    Sunny

    • 59
    • 82

    Mostly Sunny

    • 56
    • 81

    Sunny

    • 54
    • 79

    Sunny

    • 57
    • 79

    Sunny

    • 63
    • 81

    Sunny

    • 67
    • 85

    Sunny

Today 12 Sep San Diego County Mountains

Mostly sunny. Highs 84 to 93. Areas of Winds southwest to 10 Mph becoming west with Gusts to 30 Mph this afternoon.

Tonight 12 Sep San Diego County Mountains

Mostly clear. Lows 58 to 68. Areas of Winds west 10 to 15 Mph with Gusts to 25 Mph. Becoming to 10 Mph overnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Cuyamaca Temperature Statistics

September Temperature

Ramona, Ramona Airport (19.3 miles)

  • Lowest 3 September, 2026

    50 °F

  • Average September

    77.4 °F

  • Highest 9 September, 2026

    104 °F

Climate (2021–2026)

Ramona, Ramona Airport (19.3 miles)

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  • Average Low 2021–2026

    51.7 °F

  • Average 2021–2026

    64.7 °F

  • Average High 2021–2026

    76.9 °F
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