Cottonwood One County Park Weather Forecast

    • 64
    • 83

    Mostly Sunny

    • 70
    • 86

    Partly Sunny

    • 69
    • 88

    Slight Chance Rain Showers

    • 68
    • 89

    Partly Sunny

    • 69
    • 90

    Partly Sunny

    • 69
    • 90

    Mostly Sunny

Today 4 Sep San Diego County Inland Valleys

Mostly sunny. Highs 81 to 86. Areas of Winds southwest to 10 Mph. Becoming 10 to 15 Mph this afternoon.

Tonight 4 Sep San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy. Lows 58 to 63. Areas of Winds west to 10 Mph in the evening becoming light.

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  • Temperature Real-Time

Cottonwood One County Park Temperature Statistics

September Temperature

Gillespie Field Airport (6.2 miles)

  • Lowest 1 September, 2026

    62.6 °F

  • Average September

    69.3 °F

  • Highest 1 September, 2026

    87.8 °F

Climate (2021–2026)

Gillespie Field Airport (6.2 miles)

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  • Average Low 2021–2026

    53.5 °F

  • Average 2021–2026

    60.6 °F

  • Average High 2021–2026

    76.3 °F
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