Nassau Weather Forecast

    • 67
    • 83

    Partly Sunny

    • 67
    • 74

    Partly Sunny

    • 67
    • 79

    Rain Showers Likely

    • 64
    • 77

    Chance Rain Showers

    • 61
    • 71

    Chance Rain Showers

    • 61
    • 68

    Chance Rain Showers

    • 58
    • 68

    Chance Rain Showers

Today 18 Sep Inland Sussex

Partly sunny with a 20 percent chance of Showers. Hot. Near steady temperature in the lower 80s. Northeast Winds 5 to 10 Mph.

Tonight 18 Sep Inland Sussex

Partly cloudy in the Evening, then becoming mostly cloudy. Humid with Lows in the mid 60s. Northeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Nassau Temperature Statistics

September Temperature

Georgetown - Delaware Coastal Airport (9.9 miles)

  • Lowest 16 September, 2026

    55 °F

  • Average September

    75.3 °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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