Weather on March 21
Cambridge, MA
55 Years of Data
Avg High
50°F
Avg Low
31°F
Warmest
2012
60°F avg
Coldest
1988
26°F avg
About This Date
March 21st in Cambridge, MA typically brings cool spring weather, with average highs around 50°F and lows near 31°F. Over 56 years of records, the warmest March 21st was in 2012 (60°F average), while the coldest was 1988 (26°F) — a 34°F range across recorded history. Precipitation has occurred on 30% of recorded March 21st dates, with snow falling 9% of the time (heaviest snowfall: 2.6"). The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
Planning for March 21st in Cambridge, MA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 57° | 33° | 45° | 0.3" | — |
| 2025 | 58° | 40° | 49° | 0.71" | — |
| 2024 | 54° | 27° | 40° | 0.25" | — |
| 2023 | 54° | 30° | 42° | — | — |
| 2022 | 64° | 41° | 53° | — | — |
| 2021 | 61° | 29° | 45° | — | — |
| 2020 | 69° | 41° | 55° | — | — |
| 2019 | 53° | 29° | 41° | — | — |
| 2018 | 43° | 29° | 36° | — | — |
| 2017 | 52° | 33° | 42° | — | — |
| 2016 | 39° | 28° | 34° | 0.81" | 2.6" |
| 2015 | 34° | 23° | 28° | 0.18" | 0.7" |
| 2014 | 53° | 35° | 44° | — | — |
| 2013 | 40° | 24° | 32° | — | — |
| 2012warmest | 79° | 42° | 60° | — | — |
| 2011 | 42° | 33° | 38° | — | — |
| 2010 | 72° | 44° | 58° | — | — |
| 2009 | 39° | 24° | 32° | — | — |
| 2008 | 40° | 30° | 35° | — | — |
| 2007 | 35° | 20° | 27° | — | — |
| 2006 | 47° | 23° | 35° | — | — |
| 2005 | 42° | 34° | 38° | — | — |
| 2004 | 50° | 31° | 40° | 0.76" | — |
| 2003 | 52° | 29° | 40° | 1.14" | — |
| 2002 | 41° | 31° | 36° | 1.8" | 2" |
| 2001 | 55° | 31° | 43° | — | — |
| 2000 | 43° | 35° | 39° | — | — |
| 1999 | 50° | 27° | 38° | — | — |
| 1998 | 35° | 29° | 32° | 0.05" | 0.1" |
| 1997 | 45° | 26° | 35° | 0.03" | — |
| 1996 | 50° | 33° | 42° | — | — |
| 1995 | 55° | 33° | 44° | — | — |
| 1994 | 48° | 26° | 37° | — | — |
| 1993 | 46° | 20° | 33° | — | — |
| 1992 | 43° | 24° | 33° | — | — |
| 1991 | 54° | 28° | 41° | — | — |
| 1990 | 52° | 36° | 44° | 0.51" | — |
| 1989 | 47° | 32° | 39° | 1.3" | 1.2" |
| 1988coldest | 40° | 12° | 26° | — | — |
| 1987 | 43° | 32° | 37° | — | — |
| 1986 | 65° | 52° | 58° | — | — |
| 1985 | 59° | 23° | 41° | — | — |
| 1984 | 42° | 35° | 39° | 0.13" | — |
| 1983 | 54° | 30° | 42° | — | — |
| 1982 | 50° | 30° | 40° | — | — |
| 1981 | 38° | 24° | 31° | — | — |
| 1980 | 62° | 37° | 50° | 0.46" | — |
| 1979 | 50° | 40° | 45° | 0.03" | — |
| 1978 | 45° | 30° | 37° | — | — |
| 1977 | 49° | 27° | 38° | — | — |
| 1976 | 74° | 45° | 59° | — | — |
| 1975 | 62° | 32° | 47° | 0.66" | — |
| 1974 | 47° | 30° | 38° | — | — |
| 1973 | 45° | 25° | 35° | — | — |
| 1972 | 40° | 24° | 32° | — | — |
| 1971 | 46° | 30° | 38° | 0.05" | — |
56 years of data from CHESTNUT HILL