Oneonta Slough Weather Forecast

    • 73
    • 85

    Mostly Sunny

    • 72
    • 80

    Partly Sunny

    • 69
    • 78

    Patchy Fog

    • 68
    • 75

    Mostly Cloudy

    • 67
    • 74

    Partly Sunny

    • 66
    • 74

    Partly Sunny

    • 65
    • 73

    Partly Sunny

Today 9 Sep San Diego County Coastal Areas

Mostly sunny. Highs 88 to 93 near the coast to 97 to 102 inland. Areas of Winds west to 10 Mph.

Tonight 9 Sep San Diego County Coastal Areas

Mostly clear this evening. Becoming partly cloudy. Lows around 73. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Oneonta Slough Temperature Statistics

September Temperature

Imperial Beach Naval Outlying Field - Ream Field (1.2 miles)

  • Lowest 3 September, 2026

    57.9 °F

  • Average September

    71.8 °F

  • Highest 6 September, 2026

    88 °F

Climate (2021–2026)

Imperial Beach Naval Outlying Field - Ream Field (1.2 miles)

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  • Average Low 2021–2026

    56.5 °F

  • Average 2021–2026

    63.2 °F

  • Average High 2021–2026

    69.4 °F
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