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 »
  The month with the shortest days in Dover is December, with an average of 9h and 30min of daylight. On the first day of December sunrise is at 7:03 am and sunset at 4:39 pm.
• Newark - December »
  In Newark during December, the rain falls for 10.9 days and regularly aggregates up to 3.11" (79mm) of precipitation. In Newark, in December, snow falls for 2.9 days, with typically accumulated 1.26" (32mm) of snow.
• Middletown - December »
  The month with the shortest days in Middletown is December, with an average of 9h and 24min of daylight. In Middletown, in December, during 2.5 snowfall days, 0.35" (9mm) of snow is typically accumulated.
• Smyrna - December »
  In Smyrna in December, snow falls for 2.5 days, with typically accumulated 0.91" (23mm) of snow. In Smyrna in December, it is raining for 11.5 days, with typically 3.43" (87mm) of accumulated precipitation.
• Milford - December »
  In Milford, during December, snow falls for 1.7 days and regularly aggregates up to 0.83" (21mm) of snow. In Milford, in December, snow falls for 1.7 days, with typically accumulated 0.83" (21mm) of snow.
• Seaford - December »
  In Seaford during December, snow falls for 0.9 days and regularly aggregates up to 0.12" (3mm) of snow. In Seaford, in December, snow falls for 0.9 days, with typically accumulated 0.12" (3mm) of snow.
• Georgetown - December »
  In Georgetown during December, snow falls for 1.9 days and regularly aggregates up to 0.91" (23mm) of snow. In Georgetown in December, during 10 rainfall days, 1.89" (48mm) of precipitation is typically accumulated.
• Elsmere - December »
  In Elsmere during December, snow falls for 3 days and regularly aggregates up to 1.26" (32mm) of snow. 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, in December, snow falls for 2.4 days, with typically accumulated 0.51" (13mm) of snow. 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, snow falls for 1.2 days and regularly aggregates up to 0.91" (23mm) of snow. In Lewes, during December, the rain falls for 11.9 days and regularly aggregates up to 3.07" (78mm) of precipitation.
• 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, in December, during 6.6 rainfall days, 0.55" (14mm) of precipitation is typically accumulated.