Wilmington December Weather

Averages and records for weather in Wilmington, Delaware in the month of December.
Typical Wilmington December Weather
1991–2020
Average daily high 45.8 °F
Average daily low 30.1 °F
Average monthly precipitation 3.9 inches
Average monthly snow 2.9 inches
Daily chance of precipitation 34.3%
Daily chance of snow 5.4%
Wilmington December Weather Records
1894–2024
Highest temperature 75 °F December 4, 1998
Lowest temperature -7 °F December 25, 1983
Highest daily low 60 °F December 24, 2015
Lowest daily high 4 °F December 30, 1917
Hottest average high temperature 57.1 °F 2015
Coldest average high temperature 32.5 °F 1989
Most daily precipitation 3.6 inches December 30, 1901
Most monthly precipitation 8.6 inches 2009
Most daily snow 17.0 inches December 19, 2009
Most monthly snow 21.5 inches 1966
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
December 1 50.1 33.4 74 10
December 2 49.8 33.2 67 11
December 3 49.5 33.1 68 9
December 4 49.2 32.9 75 10
December 5 48.8 32.5 72 12
December 6 48.4 32.2 72 15
December 7 48.2 32.0 72 7
December 8 48.0 31.8 69 15
December 9 47.9 31.7 72 13
December 10 47.6 31.6 72 9
December 11 47.3 31.3 67 10
December 12 46.9 31.0 68 8
December 13 46.5 30.7 67 7
December 14 46.3 30.5 69 10
December 15 46.0 30.2 68 9
December 16 45.6 30.0 69 8
December 17 45.4 29.8 62 6
December 18 45.2 29.6 71 0
December 19 44.9 29.4 62 8
December 20 44.8 29.2 66 2
December 21 44.7 29.1 68 -1
December 22 44.6 29.0 70 5
December 23 44.5 28.9 66 4
December 24 44.4 28.8 71 -5
December 25 44.1 28.6 70 -7
December 26 44.0 28.5 70 -2
December 27 43.8 28.3 65 6
December 28 43.7 28.2 67 6
December 29 43.7 28.2 74 2
December 30 43.7 28.1 66 -7
December 31 43.6 28.0 67 -4
Weather Station Details
Years Station Coordinates
1948–2024 New Castle Airport location
1932–1947 Wilmington Porter Research location
1894–1931 Wilmington City Hall location