December weather in Bethany Beach, DE
The average temperature in Bethany Beach in December is 40.7°F (31.9°F–49.5°F). Average precipitation: 3.60 inches.
December is a winter month in Bethany Beach, and is cooler than the annual average of 56°F. Daily temperatures swing about 17.6°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 19m. For travel, December is cool.
Avg High
49.5°F
Avg Low
31.9°F
Precipitation
3.60 in
Daylight
9h 19m
December records in Bethany Beach
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 71.1°F (2001) | 22.1°F (2024) | 0.58 in (2015) |
| December 2 | 66.9°F (2023) | 21.9°F (2002) | 1.14 in (2025) |
| December 3 | 69.1°F (2012) | 19.9°F (2002) | 0.40 in (2022) |
| December 4 | 68.0°F (1999) | 19.0°F (2002) | 0.62 in (2020) |
| December 5 | 69.1°F (2001) | 19.0°F (2000) | 2.53 in (2020) |
| December 6 | 70.0°F (2001) | 18.1°F (2007) | 1.63 in (2016) |
| December 7 | 64.0°F (2001) | 17.2°F (2007) | 0.32 in (2004) |
| December 8 | 64.9°F (2004) | 23.0°F (2005) | 0.68 in (2014) |
| December 9 | 68.0°F (2007) | 17.2°F (2006) | 2.06 in (2009) |
| December 10 | 77.0°F (2007) | 18.1°F (2010) | 1.17 in (2004) |
| December 11 | 66.0°F (2008) | 21.2°F (2013) | 2.80 in (2008) |
| December 12 | 72.0°F (2007) | 19.2°F (2013) | 0.80 in (2008) |
| December 13 | 71.1°F (2015) | 18.0°F (2025) | 1.50 in (2009) |
| December 14 | 66.0°F (2001) | 19.0°F (2005) | 1.47 in (2020) |
| December 15 | 66.0°F (2008) | 18.0°F (2025) | 1.81 in (2022) |
| December 16 | 68.0°F (2021) | 16.2°F (2010) | 1.75 in (2020) |
| December 17 | 71.1°F (2021) | 17.2°F (2010) | 1.10 in (2023) |
| December 18 | 73.0°F (2006) | 14.2°F (2010) | 1.32 in (2023) |
| December 19 | 66.0°F (2021) | 21.2°F (2011) | 0.89 in (2009) |
| December 20 | 60.1°F (1999) | 12.0°F (2004) | 0.64 in (2002) |
| December 21 | 64.0°F (2013) | 12.9°F (2004) | 0.64 in (2012) |
| December 22 | 68.0°F (2013) | 16.0°F (2000) | 0.48 in (2022) |
| December 23 | 63.0°F (2013) | 12.0°F (2000) | 0.59 in (2007) |
| December 24 | 68.0°F (2015) | 12.9°F (2000) | 1.48 in (2003) |
| December 25 | 70.0°F (2015) | 11.1°F (2022) | 1.31 in (2006) |
| December 26 | 66.0°F (2015) | 12.0°F (2000) | 2.94 in (2012) |
| December 27 | 72.0°F (2015) | 18.0°F (2000) | 0.50 in (2011) |
| December 28 | 71.1°F (2008) | 12.2°F (2017) | 1.07 in (2018) |
| December 29 | 66.0°F (2001) | 13.1°F (2017) | 1.00 in (2013) |
| December 30 | 63.0°F (2024) | 16.0°F (2001) | 0.70 in (2007) |
| December 31 | 61.0°F (2011) | 13.1°F (2017) | 0.87 in (2022) |