Nassau Weather Forecast

    • 59
    • 67

    Decreasing Clouds

    • 59
    • 71

    Partly Sunny

    • 62
    • 75

    Partly Sunny

    • 66
    • 80

    Partly Sunny

    • 62
    • 79

    Slight Chance Rain Showers

    • 59
    • 69

    Mostly Cloudy

Today 28 Sep Inland Sussex

Mostly cloudy. Highs in the upper 60s. Northwest Winds 5 to 10 Mph.

Tonight 28 Sep Inland Sussex

Mostly cloudy. Lows in the upper 50s. West Winds around 5 Mph.

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Nassau Temperature Statistics

September Temperature

Georgetown - Delaware Coastal Airport (9.9 miles)

  • Lowest 16 September, 2026

    55.7 °F

  • Average September

    73.2 °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

    58.6 °F

  • Average High 2021–2026

    68.3 °F
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