Weather on December 20
Boston, MA
55 Years of Data
About This Date
December 20th in Boston, MA typically brings cold winter weather, with average highs around 39°F and lows near 25°F. Over 55 years of records, the warmest December 20th was in 2002 (50°F average), while the coldest was 1980 (11°F) — a 39°F range across recorded history. Precipitation has occurred on 40% of recorded December 20th dates, with snow falling 29% of the time (heaviest snowfall: 10"). The last decade has been 2.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.8°F cooler on this date compared to 20-30 years ago.
Planning for December 20th in Boston, MA? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella. Check road conditions if traveling, as snow is possible.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 38° | 32° | 35° | — | — |
| 2024 | 37° | 26° | 32° | 1.3" | 5.2" |
| 2023 | 44° | 30° | 37° | — | — |
| 2022 | 41° | 30° | 36° | — | — |
| 2021 | 33° | 20° | 27° | — | — |
| 2020 | 36° | 26° | 31° | 0.08" | — |
| 2019 | 33° | 17° | 25° | — | — |
| 2018 | 50° | 32° | 41° | — | — |
| 2017 | 47° | 31° | 39° | — | — |
| 2016 | 34° | 18° | 26° | — | — |
| 2015 | 41° | 31° | 36° | — | — |
| 2014 | 36° | 27° | 32° | — | — |
| 2013 | 51° | 32° | 42° | — | — |
| 2012 | 43° | 33° | 38° | — | — |
| 2011 | 45° | 32° | 38° | — | — |
| 2010 | 33° | 26° | 30° | 0.48" | 2.6" |
| 2009 | 30° | 19° | 25° | 1.4" | 10" |
| 2008 | 20° | 13° | 16° | 0.46" | 3.7" |
| 2007 | 35° | 29° | 32° | 1.24" | 7.3" |
| 2006 | 43° | 29° | 36° | — | — |
| 2005 | 35° | 22° | 28° | — | — |
| 2004 | 39° | 6° | 23° | 0.28" | 0.6" |
| 2003 | 38° | 28° | 33° | — | — |
| 2002warmest | 61° | 39° | 50° | 2.82" | — |
| 2001 | 44° | 35° | 40° | — | — |
| 2000 | 33° | 25° | 29° | 0.46" | 0.8" |
| 1999 | 52° | 27° | 39° | 0.2" | — |
| 1998 | 48° | 39° | 44° | — | — |
| 1997 | 46° | 28° | 37° | — | — |
| 1996 | 45° | 24° | 34° | — | — |
| 1995 | 29° | 21° | 25° | 1.78" | 7.7" |
| 1994 | 39° | 28° | 34° | — | — |
| 1993 | 43° | 35° | 39° | — | — |
| 1992 | 48° | 32° | 40° | 0.23" | — |
| 1991 | 34° | 20° | 27° | — | — |
| 1990 | 39° | 30° | 35° | — | — |
| 1989 | 28° | 16° | 22° | 0.03" | 0.2" |
| 1988 | 53° | 26° | 40° | — | — |
| 1987 | 38° | 28° | 33° | 0.3" | 0.9" |
| 1986 | 41° | 32° | 37° | — | — |
| 1985 | 30° | 17° | 24° | — | — |
| 1984 | 47° | 35° | 41° | — | — |
| 1983 | 16° | 8° | 12° | — | — |
| 1982 | 33° | 27° | 30° | 0.1" | 0.5" |
| 1981 | 23° | 17° | 20° | — | — |
| 1980coldest | 19° | 4° | 11° | — | — |
| 1979 | 25° | 13° | 19° | 0.03" | 0.2" |
| 1978 | 35° | 25° | 30° | 0.1" | — |
| 1977 | 41° | 34° | 37° | 0.58" | 0.4" |
| 1976 | 46° | 28° | 37° | 0.66" | — |
| 1975 | 34° | 7° | 20° | 0.64" | 2.8" |
| 1974 | 45° | 36° | 40° | — | — |
| 1973 | 54° | 25° | 39° | — | — |
| 1972 | 37° | 21° | 29° | 0.36" | 0.1" |
| 1971 | 33° | 28° | 31° | 0.53" | 1.2" |