December weather forecast
Delaware, USA

December marks the onset of winter in Delaware, with temperatures that are significantly lower than previous months and a shift toward cold and often freezing conditions. The coastal regions lose most of their moderating influence, and the entire state experiences a more uniform winter climate.

Temperatures in December frequently dip to freezing levels, especially during the nights. The range of temperature fluctuates, moving further away from the highs of 90°F (32.2°C) experienced in summer, and leaning toward the cold of the northern states.

December contributes to Delaware's annual rainfall of 44" (1118mm) to 47" (1194mm) and initiates the snowfall season, ranging from 14" (356mm) in the south to 18" (457mm) in the north. Snowfall usually occurs between December and March, with occasional flurries signaling the winter's arrival.

The Appalachian Mountains still act as a barrier to the cold winds, but their ability to completely shield Delaware from winter's chill becomes less effective. Cold fronts from the north routinely sweep the state.

The distinction between southern Delaware's milder temperatures and the rest of the state becomes negligible as winter sets in, erasing the climatic differences that were present during the growing season.

December's weather in Delaware is characterized by the clear and unambiguous arrival of winter. The temperatures drop, the days shorten, and snow begins to fall. It's a time of transition from the mild beauty of autumn to the stark and often breathtaking scenery of winter. The month stands as a gateway to the coldest season, setting the stage for the deep chill that often defines the beginning of the new year in Delaware.

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• Wilmington - December »
  In Wilmington, in December, during 3.2 snowfall days, 1.54" (39mm) of snow is typically accumulated. Completing the climatic cycle of the year, December in Wilmington is characterized by cold temperatures, decreased daylight hours and significantly increased snowfall.
• Dover - December »
  In December, the rain falls for 10.5 days. As November shifts into December a minor alteration in temperatures is observed, with average highs reducing from a cool 54.3°F (12.4°C) to a chilly 46.2°F (7.9°C).
• Newark - December »
  In Newark, Delaware, during December, the rain falls for 10.9 days and regularly aggregates up to 3.11" (79mm) of precipitation. The month with the shortest days in Newark is December, with an average of 9h and 24min of daylight.
• Middletown - December »
  In Middletown in December, during 2.5 snowfall days, 0.35" (9mm) of snow is typically accumulated. In Middletown, during December, snow falls for 2.5 days and regularly aggregates up to 0.35" (9mm) of snow.
• Smyrna - December »
  In Smyrna, during December, the rain falls for 11.5 days and regularly aggregates up to 3.43" (87mm) of precipitation. In Smyrna, in December, during 2.5 snowfall days, 0.91" (23mm) of snow is typically accumulated.
• Milford - December »
  In Milford in December, snow falls for 1.7 days, with typically accumulated 0.83" (21mm) of snow. In Milford during December, snow falls for 1.7 days and regularly aggregates up to 0.83" (21mm) of snow.
• Seaford - December »
  In Seaford during December, the rain falls for 6 days and regularly aggregates up to 0.59" (15mm) of precipitation. In Seaford, in December, during 0.9 snowfall days, 0.12" (3mm) of snow is typically accumulated.
• Georgetown - December »
  In Georgetown, Delaware, during December, snow falls for 1.9 days and regularly aggregates up to 0.91" (23mm) of snow. In Georgetown during December, the rain falls for 10 days and regularly aggregates up to 1.89" (48mm) of precipitation.
• Elsmere - December »
  The month with the most rainfall in Elsmere is December, when the rain falls for 11 days and typically aggregates up to 3.35" (85mm) of precipitation. In Elsmere, during December, the rain falls for 11 days and regularly aggregates up to 3.35" (85mm) of precipitation.
• New Castle - December »
  In New Castle, during December, the rain falls for 8.8 days and regularly aggregates up to 1.85" (47mm) of precipitation. In New Castle, during December, snow falls for 2.4 days and regularly aggregates up to 0.51" (13mm) of snow.
• Lewes - December »
  In Lewes during December, the rain falls for 11.9 days and regularly aggregates up to 3.07" (78mm) of precipitation. In Lewes, during December, snow falls for 1.2 days and regularly aggregates up to 0.91" (23mm) of snow.
• Rehoboth Beach - December »
  The months with the most snowfall in Rehoboth Beach are January and December, with an average 0.12" (3mm) of accumulated snow. In Rehoboth Beach, Delaware, during December, the rain falls for 6.6 days and regularly aggregates up to 0.55" (14mm) of precipitation.