Weather in Rockland: December
 |
Average day temperature: | 36.0°F |
| Average night temperature: | 32.0°F | |
 |
Sea water temperature: | 44.5°F |
 |
Number of sunny days: | 12 days |
| Day length: | 8.9 - 9.1 hours | |
 |
Number of rainy days: | 3 days |
| Precipitation totals: | 1.4 in. | |
| more information | ||
forecast
| Rockland |
temperature
| Rockland |
Air temperature in December, °F
The highest day temperature during December of 2025 was 50°F. At the same time the lowest night temperature was 7°F. Daily and nightly averages during December were 31.5°F and 26.0°F.
Sea water temperature in Rockland in December, °F
The average sea water temperature in December of 2025 was 43.1°F. The highest and lowest sea temperatures during the month were 46.9°F and 38.8°F.
Number of sunny, partly cloudy and cloudy days in December is almost equal.
Precipitation total in December, in.
Precipitation total value in Rockland in December is 1.4 in. Other months of the year show relatively similar values.
The average wind speed value in December is 12.3 mph It makes December most windy month of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 4.8.
Best time for vacation in Rockland
Rockland on a weather map
16 mph
14 mph
16 mph
18 mph
17 mph
16 mph
17 mph
15 mph
