O'Neil Weather Forecast

    • 77
    • 85

    Chance Thunderstorms

    • 79
    • 85

    Slight Chance Thunderstorms

    • 78
    • 83

    Rain Showers Likely

    • 78
    • 81

    Breezy

    • 76
    • 81

    Rain Showers Likely

    • 76
    • 81

    Chance Thunderstorms

    • 76
    • 82

    Chance Thunderstorms

Today 13 Sep Coastal Nassau

Partly sunny with a chance of Showers and Thunderstorms. Highs in the lower 90s. South Winds around 5 Mph. Chance of rain 50 percent.

Tonight 13 Sep Coastal Nassau

Mostly cloudy with a chance of Showers and Thunderstorms this Evening, then partly cloudy after midnight. Lows in the mid 70s. South Winds around 5 Mph, becoming southwest around 5 Mph after midnight. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

O'Neil Temperature Statistics

September Temperature

Fernandina Beach Municipal Airport (3.1 miles)

  • Lowest 7 September, 2026

    73.4 °F

  • Average September

    81.4 °F

  • Highest 5 September, 2026

    89.6 °F

Climate (2021–2026)

Fernandina Beach Municipal Airport (3.1 miles)

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  • Average Low 2021–2026

    62.7 °F

  • Average 2021–2026

    70.1 °F

  • Average High 2021–2026

    78.3 °F
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