December weather in Dewey Beach, DE
The average temperature in Dewey Beach in December is 42.4°F (35.0°F–49.9°F). Average precipitation: 4.17 inches. Average snowfall is 1.0 inches.
December is a winter month in Dewey Beach, and is cooler than the annual average of 58.5°F. Daily temperatures swing about 14.9°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 9h 18m. For travel, December is cool.
Avg High
49.9°F
Avg Low
35.0°F
Precipitation
4.17 in
Snow
1.0 in
December records in Dewey Beach
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 73.0°F (2001) | 15.1°F (1958) | 1.08 in (1974) |
| December 2 | 70.0°F (2006) | 14.0°F (1967) | 1.10 in (2025) |
| December 3 | 72.0°F (1950) | 16.0°F (1946) | 1.59 in (2009) |
| December 4 | 75.0°F (1998) | 14.0°F (1976) | 1.12 in (1957) |
| December 5 | 75.9°F (1982) | 18.0°F (1966) | 2.00 in (2020) |
| December 6 | 75.9°F (1998) | 21.0°F (1957) | 1.23 in (1945) |
| December 7 | 77.0°F (1998) | 16.0°F (1954) | 1.90 in (1976) |
| December 8 | 73.0°F (1978) | 14.0°F (1954) | 1.80 in (1981) |
| December 9 | 73.9°F (1966) | 10.9°F (1976) | 2.24 in (2009) |
| December 10 | 73.9°F (1966) | 12.0°F (1968) | 1.90 in (1969) |
| December 11 | 70.0°F (1971) | 10.9°F (1968) | 1.75 in (2008) |
| December 12 | 68.0°F (1979) | 12.9°F (1977) | 2.29 in (2008) |
| December 13 | 70.0°F (1956) | 9.0°F (1958) | 1.40 in (1998) |
| December 14 | 68.0°F (1953) | 8.1°F (1958) | 2.54 in (1996) |
| December 15 | 70.0°F (1971) | 12.9°F (1962) | 2.29 in (2022) |
| December 16 | 72.0°F (1971) | 0.0°F (1958) | 2.53 in (2020) |
| December 17 | 66.9°F (1984) | 3.9°F (1958) | 0.98 in (2023) |
| December 18 | 72.0°F (2006) | 10.0°F (1945) | 3.61 in (2023) |
| December 19 | 68.0°F (1990) | 14.0°F (1989) | 0.91 in (1995) |
| December 20 | 63.0°F (1984) | 10.9°F (1963) | 1.07 in (1957) |
| December 21 | 66.9°F (1956) | 12.0°F (1958) | 1.32 in (1973) |
| December 22 | 72.0°F (1949) | 7.0°F (1989) | 1.74 in (1972) |
| December 23 | 71.1°F (1990) | 10.0°F (1945) | 0.79 in (1963) |
| December 24 | 69.1°F (1982) | 10.0°F (2022) | 1.85 in (1978) |
| December 25 | 73.0°F (1982) | 3.0°F (1983) | 1.84 in (1986) |
| December 26 | 71.1°F (1964) | 3.9°F (1983) | 0.85 in (1957) |
| December 27 | 68.0°F (1982) | 9.0°F (1948) | 1.07 in (1981) |
| December 28 | 73.0°F (2008) | 12.0°F (1950) | 1.14 in (1990) |
| December 29 | 75.0°F (1984) | 12.0°F (1952) | 2.76 in (1945) |
| December 30 | 71.1°F (1990) | 10.9°F (1976) | 1.18 in (1948) |
| December 31 | 71.1°F (1990) | 8.1°F (1962) | 1.38 in (1975) |