December weather in Wilmington, DE
The average temperature in Wilmington in December is 35.9°F (29.0°F–42.8°F). Average precipitation: 4.37 inches. Average snowfall is 0.8 inches.
December is a winter month in Wilmington, and is cooler than the annual average of 53.4°F. Daily temperatures swing about 13.8°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 12m. For travel, December is cold.
Avg High
42.8°F
Avg Low
29.0°F
Precipitation
4.37 in
Snow
0.8 in
December records in Wilmington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 72.0°F (2006) | 10.0°F (1936) | 1.36 in (1996) |
| December 2 | 64.9°F (1970) | 12.0°F (1967) | 1.40 in (1986) |
| December 3 | 66.0°F (1950) | 9.0°F (1976) | 1.75 in (1967) |
| December 4 | 73.0°F (1998) | 10.0°F (1940) | 1.47 in (1983) |
| December 5 | 68.0°F (1982) | 17.1°F (1935) | 1.58 in (1993) |
| December 6 | 71.1°F (1982) | 15.1°F (1940) | 1.57 in (1983) |
| December 7 | 72.0°F (1998) | 15.1°F (2002) | 1.37 in (1936) |
| December 8 | 68.0°F (1980) | 15.1°F (1970) | 1.42 in (1972) |
| December 9 | 70.0°F (1966) | 12.9°F (1960) | 2.25 in (2009) |
| December 10 | 68.0°F (1966) | 10.9°F (1934) | 1.65 in (1969) |
| December 11 | 64.9°F (1971) | 10.0°F (1968) | 1.93 in (2008) |
| December 12 | 66.9°F (2015) | 7.0°F (1988) | 2.80 in (1983) |
| December 13 | 69.1°F (2015) | 7.0°F (1960) | 2.44 in (1996) |
| December 14 | 68.0°F (2015) | 12.0°F (1976) | 1.64 in (1996) |
| December 15 | 66.9°F (2015) | 9.0°F (1943) | 1.93 in (2022) |
| December 16 | 66.9°F (1971) | 8.1°F (1943) | 1.56 in (1974) |
| December 17 | 64.0°F (2001) | 5.0°F (1951) | 2.14 in (2000) |
| December 18 | 69.1°F (2006) | 12.0°F (1989) | 2.19 in (2023) |
| December 19 | 59.0°F (1957) | 10.9°F (1963) | 1.15 in (1995) |
| December 20 | 60.1°F (1957) | 1.9°F (1942) | 1.53 in (1951) |
| December 21 | 64.0°F (2013) | -29.0°F (2009) | 1.80 in (1973) |
| December 22 | 66.9°F (2013) | 3.9°F (1989) | 1.50 in (1983) |
| December 23 | 69.1°F (2015) | 5.0°F (2022) | 1.50 in (2011) |
| December 24 | 71.1°F (2015) | 0.0°F (1983) | 2.08 in (2020) |
| December 25 | 69.1°F (2015) | -0.9°F (1983) | 1.01 in (2002) |
| December 26 | 69.1°F (1964) | 0.0°F (1983) | 1.40 in (1975) |
| December 27 | 64.9°F (2015) | 7.0°F (1950) | 2.38 in (2011) |
| December 28 | 64.0°F (1982) | 6.1°F (1933) | 1.85 in (2018) |
| December 29 | 73.0°F (1984) | 1.9°F (1933) | 1.35 in (2013) |
| December 30 | 64.9°F (1990) | -0.9°F (1933) | 2.04 in (1948) |
| December 31 | 64.0°F (1992) | 1.9°F (1962) | 1.10 in (1975) |