Bethany Beach Weather: December
 |
Average Day Temperature: | 45.3°F |
|
Average Night Temperature: | 40.9°F |
|
Sea Water Temperature: | 47.6°F |
|
Number of Sunny Days: | 13 days |
| Sunshine Hours: | 9.5 - 9.7 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.3 in | |
| detailed information | ||
forecast
| Bethany Beach |
Temperature
| Bethany Beach |
Air Temperature in December, °F
The highest day temperature in December 2025 was 55°F. The lowest night temperature was 18°F. The average values for day and night temperatures during December were 41.0°F и 35.3°F respectivly.
Bethany Beach Water Sea Temperature in December, °F
The average sea surface temperature in December 2025 for Bethany Beach was 43.5°F. The maximum and minimum values were 40.0°F and 50.6°F respectively.
Most of the days in December are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in December, in
Precipitation total in December for Bethany Beach is 1.3 in. It makes december one of the most rainy months of the year.
The average wind speed in December is 12.6 mph. It makes December one of the most windy months of the year for Bethany Beach.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Bethany Beach in December is 5.6 hours.
Bethany Beach on the Weather Map
| Chicago |  |
+42 |
| Hawaii |  |
+74 |
| Honolulu | |
+74 |
| Houston |  |
+74 |
| Las Vegas |  |
+36 |
| Los Angeles | |
+42 |
| Maui | |
+68 |
| Miami | |
+76 |
| Miami Beach | |
+78 |
| New York | |
+38 |
| San Diego | |
+46 |
| San Francisco | |
+42 |
| Sarasota | |
+68 |
| Tampa | |
+68 |
| Washington |  |
+36 |
| 1200 |  |
46°F | N 13 mph |
| 1500 | |
48°F | N 16 mph |
| 1800 |  |
50°F | N 14 mph |
| 2100 |  |
50°F | NE 14 mph |
| 0000 | |
52°F | NE 13 mph |
| 0300 | |
52°F | NE 9 mph |
| 0600 | |
52°F | NE 1 mph |
| 0900 | |
52°F | NW 6 mph |