Weather on December 9
Boston, MA
55 Years of Data
Avg High
43°F
Avg Low
28°F
Warmest
1991
53°F avg
Coldest
1989
17°F avg
About This Date
December 9th in Boston, MA typically brings chilly winter weather, with average highs around 43°F and lows near 28°F. Over 55 years of records, the warmest December 9th was in 1991 (53°F average), while the coldest was 1989 (17°F) — a 36°F range across recorded history. Precipitation has occurred on 44% of recorded December 9th dates, with snow falling 16% of the time (heaviest snowfall: 8.6"). The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for December 9th in Boston, MA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 32° | 14° | 23° | — | — |
| 2024 | 46° | 35° | 41° | 0.89" | — |
| 2023 | 52° | 33° | 42° | — | — |
| 2022 | 47° | 33° | 40° | — | — |
| 2021 | 38° | 26° | 32° | 0.03" | — |
| 2020 | 36° | 24° | 30° | — | — |
| 2019 | 61° | 41° | 51° | 1.4" | — |
| 2018 | 37° | 23° | 30° | — | — |
| 2017 | 37° | 31° | 34° | 1.68" | 5.8" |
| 2016 | 37° | 25° | 31° | — | — |
| 2015 | 46° | 37° | 42° | — | — |
| 2014 | 49° | 29° | 39° | 7.37" | — |
| 2013 | 43° | 26° | 35° | 1.09" | 0.4" |
| 2012 | 49° | 41° | 45° | 0.2" | — |
| 2011 | 52° | 35° | 43° | — | — |
| 2010 | 29° | 19° | 24° | — | — |
| 2009 | 48° | 32° | 40° | 2.62" | — |
| 2008 | 56° | 17° | 36° | 0.13" | — |
| 2007 | 36° | 28° | 32° | 0.1" | — |
| 2006 | 38° | 24° | 31° | — | — |
| 2005 | 37° | 26° | 32° | 1.6" | 8.6" |
| 2004 | 43° | 37° | 40° | — | — |
| 2003 | 34° | 23° | 28° | — | — |
| 2002 | 27° | 12° | 19° | — | — |
| 2001 | 36° | 32° | 34° | 1.07" | 3" |
| 2000 | 31° | 17° | 24° | — | — |
| 1999 | 43° | 31° | 37° | — | — |
| 1998 | 45° | 33° | 39° | — | — |
| 1997 | 40° | 28° | 34° | — | — |
| 1996 | 43° | 29° | 36° | — | — |
| 1995 | 48° | 21° | 35° | 1.75" | 2.2" |
| 1994 | 41° | 25° | 33° | 0.15" | — |
| 1993 | 42° | 30° | 36° | — | — |
| 1992 | 30° | 16° | 23° | — | — |
| 1991warmest | 61° | 45° | 53° | — | — |
| 1990 | 47° | 34° | 40° | — | — |
| 1989coldest | 25° | 10° | 17° | — | — |
| 1988 | 34° | 25° | 29° | — | — |
| 1987 | 58° | 40° | 49° | — | — |
| 1986 | 43° | 28° | 35° | 2.06" | 0.5" |
| 1985 | 43° | 32° | 37° | — | — |
| 1984 | 49° | 34° | 41° | — | — |
| 1983 | 42° | 25° | 33° | — | — |
| 1982 | 44° | 12° | 28° | 0.1" | 0.2" |
| 1981 | 32° | 27° | 29° | 0.03" | 0.1" |
| 1980 | 61° | 33° | 47° | 0.33" | — |
| 1979 | 35° | 24° | 30° | — | — |
| 1978 | 50° | 31° | 40° | 3" | 4.6" |
| 1977 | 44° | 24° | 34° | 0.81" | — |
| 1976 | 24° | 14° | 19° | — | — |
| 1975 | 48° | 35° | 42° | 0.61" | — |
| 1974 | 55° | 35° | 45° | — | — |
| 1973 | 58° | 41° | 49° | 2.18" | — |
| 1972 | 48° | 34° | 41° | 0.38" | — |
| 1971 | 45° | 36° | 40° | 0.25" | — |
55 years of data from BOSTON