Nassau Weather Forecast

    • 23
    • 53

    Mostly Sunny

    • 29
    • 43

    Chance Rain/Snow

    • 36
    • 49

    Chance Rain

    • 34
    • 47

    Chance Rain

    • 42
    • 52

    Chance Rain

    • 38
    • 61

    Chance Rain

    • 36
    • 51

    Mostly Cloudy

Today 21 Dec Inland Sussex

Mostly sunny. Highs around 50. Temperature falling into the lower 40s this afternoon. West Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 21 Dec Inland Sussex

Mostly clear. Cold with Lows in the lower 20s. Northwest Winds 5 to 10 Mph with Gusts up to 25 Mph.

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  • Temperature Real-Time

Nassau Temperature Statistics

December Temperature

Georgetown - Delaware Coastal Airport (9.9 miles)

  • Lowest 14 December, 2025

    18 °F

  • Average December

    35.3 °F

  • Highest 19 December, 2025

    61 °F

Climate (2020–Present)

Georgetown - Delaware Coastal Airport (9.9 miles)

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  • Average Low 2020–2025

    49.2 °F

  • Average 2020–2025

    58.7 °F

  • Average High 2020–2025

    68.3 °F
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