Nassau Weather Forecast

    • 70
    • 80

    Rain Showers

    • 68
    • 84

    Rain Showers Likely

    • 61
    • 77

    Mostly Sunny

    • 60
    • 76

    Mostly Sunny

    • 62
    • 80

    Mostly Sunny

    • 64
    • 84

    Partly Sunny

Today 12 Sep Inland Sussex

Partly sunny late this Morning, then becoming mostly cloudy. Highs in the lower 80s. Southeast Winds 5 to 10 Mph.

Tonight 12 Sep Inland Sussex

Cloudy. A slight chance of Showers and Thunderstorms in the Evening, then Showers with a chance of Thunderstorms after midnight. Patchy fog after midnight. Humid with Lows in the lower 70s. Southeast Winds 5 to 10 Mph. Chance of rain 90 percent.

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Nassau Temperature Statistics

September Temperature

Georgetown - Delaware Coastal Airport (9.9 miles)

  • Lowest 8 September, 2026

    60.7 °F

  • Average September

    76.8 °F

  • Highest 1 September, 2026

    91.7 °F

Climate (2021–2026)

Georgetown - Delaware Coastal Airport (9.9 miles)

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  • Average Low 2021–2026

    48.9 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    68.3 °F
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