December weather in Rockland, ME
The average temperature in Rockland in December is 28.3°F (20.2°F–36.4°F). Average precipitation: 5.92 inches. Average snowfall is 15.0 inches.
December is a winter month in Rockland, and is cooler than the annual average of 45.5°F. Daily temperatures swing about 16.2°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 8h 42m. For travel, December is a wet month.
Avg High
36.4°F
Avg Low
20.2°F
Precipitation
5.92 in
Snow
15.0 in
December records in Rockland
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 57.0°F (2011) | 10.9°F (1989) | 2.08 in (2020) |
| December 2 | 57.9°F (2020) | 1.0°F (1989) | 2.18 in (2010) |
| December 3 | 62.1°F (2001) | -4.0°F (1976) | 1.94 in (1986) |
| December 4 | 62.1°F (2009) | -4.0°F (1976) | 1.64 in (1986) |
| December 5 | 62.1°F (1982) | -5.1°F (1976) | 3.04 in (1990) |
| December 6 | 57.0°F (1998) | 3.0°F (2025) | 2.10 in (2020) |
| December 7 | 61.0°F (2001) | 3.9°F (1991) | 1.80 in (1983) |
| December 8 | 63.0°F (1998) | -0.9°F (1989) | 1.75 in (1976) |
| December 9 | 48.0°F (1979) | -0.9°F (2002) | 0.35 in (1978) |
| December 10 | 54.0°F (2019) | -5.1°F (1976) | 2.57 in (2014) |
| December 11 | 55.0°F (2023) | -5.1°F (1988) | 3.57 in (2023) |
| December 12 | 57.0°F (2021) | -8.0°F (1977) | 2.99 in (2024) |
| December 13 | 57.0°F (1979) | -5.1°F (1982) | 2.13 in (2010) |
| December 14 | 52.0°F (2010) | -9.0°F (1976) | 2.14 in (1983) |
| December 15 | 53.1°F (2019) | -8.0°F (1980) | 3.30 in (2019) |
| December 16 | 53.1°F (2008) | -7.1°F (2016) | 1.20 in (1987) |
| December 17 | 50.0°F (1982) | -9.0°F (2013) | 1.86 in (2007) |
| December 18 | 55.9°F (2000) | -9.0°F (1988) | 1.94 in (2014) |
| December 19 | 55.0°F (2023) | -11.9°F (1985) | 1.64 in (2012) |
| December 20 | 54.0°F (2025) | -18.0°F (1980) | 0.86 in (1996) |
| December 21 | 53.1°F (2002) | -14.1°F (1980) | 1.35 in (2002) |
| December 22 | 55.0°F (2018) | -17.0°F (1980) | 3.67 in (1977) |
| December 23 | 55.0°F (1994) | -14.1°F (1980) | 1.45 in (1983) |
| December 24 | 55.9°F (1990) | -11.0°F (1989) | 1.49 in (2022) |
| December 25 | 55.9°F (2014) | -13.0°F (1980) | 1.45 in (1994) |
| December 26 | 57.0°F (2015) | -25.1°F (1980) | 1.65 in (1986) |
| December 27 | 52.0°F (1982) | -9.0°F (1993) | 1.07 in (2005) |
| December 28 | 51.1°F (2011) | -8.0°F (2017) | 1.58 in (2009) |
| December 29 | 50.0°F (1982) | -13.0°F (1989) | 1.10 in (1983) |
| December 30 | 52.0°F (2003) | -11.9°F (2017) | 2.81 in (2016) |
| December 31 | 51.1°F (2024) | -11.9°F (2017) | 1.05 in (2000) |