Weather on December 20
Cambridge, MA
55 Years of Data
Avg High
38°F
Avg Low
21°F
Warmest
2017
43°F avg
Coldest
1979
12°F avg
About This Date
December 20th in Cambridge, MA typically brings cold winter weather, with average highs around 38°F and lows near 21°F. Over 55 years of records, the warmest December 20th was in 2017 (43°F average), while the coldest was 1979 (12°F) — a 31°F range across recorded history. Precipitation has occurred on 27% of recorded December 20th dates, with snow falling 15% of the time (heaviest snowfall: 11"). The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
Planning for December 20th in Cambridge, MA? Bundle up with warm layers and protect extremities from the cold.
Warming Trend
2.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 53° | 30° | 42° | — | — |
| 2024 | 44° | 31° | 37° | — | — |
| 2023 | 50° | 29° | 39° | — | — |
| 2022 | 42° | 29° | 35° | — | — |
| 2021 | 35° | 19° | 27° | — | — |
| 2020 | 35° | 11° | 23° | — | — |
| 2019 | 22° | 12° | 17° | — | — |
| 2018 | 41° | 24° | 33° | — | — |
| 2017warmest | 50° | 35° | 43° | — | — |
| 2016 | 26° | 15° | 21° | — | — |
| 2015 | 42° | 28° | 35° | — | — |
| 2014 | 36° | 26° | 31° | — | — |
| 2013 | 42° | 21° | 32° | — | — |
| 2012 | 51° | 29° | 40° | — | — |
| 2011 | 43° | 16° | 29° | — | — |
| 2010 | 36° | 26° | 31° | — | — |
| 2009 | 29° | 18° | 23° | — | — |
| 2008 | 31° | 12° | 21° | 2.84" | 11" |
| 2007 | 35° | 29° | 32° | 1.24" | 7.3" |
| 2006 | 42° | 23° | 33° | — | — |
| 2005 | 35° | 22° | 28° | — | — |
| 2004 | 39° | 6° | 23° | 0.28" | 0.6" |
| 2003 | 39° | 26° | 33° | — | — |
| 2002 | 49° | 23° | 36° | 0.08" | — |
| 2001 | 50° | 29° | 39° | — | — |
| 2000 | 40° | 24° | 32° | 1.19" | — |
| 1999 | 40° | 22° | 31° | — | — |
| 1998 | 48° | 30° | 39° | — | — |
| 1997 | 45° | 28° | 36° | — | — |
| 1996 | 44° | 26° | 35° | 2.18" | — |
| 1995 | 24° | 17° | 21° | — | 9" |
| 1994 | 40° | 20° | 30° | — | — |
| 1993 | 36° | 28° | 32° | 0.89" | 1.2" |
| 1992 | 46° | 26° | 36° | 0.1" | — |
| 1991 | 26° | 10° | 18° | — | — |
| 1990 | 49° | 27° | 38° | — | — |
| 1989 | 30° | 15° | 23° | — | — |
| 1988 | 38° | 16° | 27° | — | — |
| 1987 | 38° | 23° | 30° | — | — |
| 1986 | 43° | 40° | 41° | 0.25" | — |
| 1985 | 35° | 25° | 30° | — | — |
| 1984 | 45° | 29° | 37° | 1.04" | — |
| 1983 | 47° | 8° | 27° | — | — |
| 1982 | 27° | 14° | 20° | — | — |
| 1981 | 31° | 9° | 20° | — | — |
| 1980 | 38° | 0° | 19° | 0.05" | — |
| 1979coldest | 17° | 6° | 12° | — | — |
| 1978 | 28° | 13° | 20° | — | — |
| 1977 | 38° | 28° | 33° | 1.8" | 3" |
| 1976 | 31° | 19° | 25° | — | — |
| 1975 | 23° | 4° | 13° | 1.65" | 8" |
| 1974 | 36° | 25° | 30° | — | — |
| 1973 | 28° | 7° | 17° | — | — |
| 1972 | 37° | 20° | 28° | 0.03" | — |
| 1971 | 28° | 10° | 19° | 0.1" | 0.5" |
55 years of data from CHESTNUT HILL