Weather on May 21
Brockton, MA
55 Years of Data
Avg High
73°F
Avg Low
48°F
Warmest
1996
76°F avg
Coldest
1990
44°F avg
About This Date
May 21st in Brockton, MA typically brings pleasant spring weather, with average highs around 73°F and lows near 48°F — a 25°F daily swing. Over 55 years of records, the warmest May 21st was in 1996 (76°F average), while the coldest was 1990 (44°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 36% of May 21st dates historically, with the wettest May 21st recording 2.29" of rain. The last decade has been 4.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.9°F warmer on this date compared to 20-30 years ago.
Planning for May 21st in Brockton, MA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 54° | 49° | 51° | — | — |
| 2024 | 85° | 53° | 69° | — | — |
| 2023 | 79° | 57° | 68° | 0.56" | — |
| 2022 | 92° | 60° | 76° | 0.2" | — |
| 2021 | 80° | 50° | 65° | — | — |
| 2020 | 76° | 39° | 57° | — | — |
| 2019 | 71° | 55° | 63° | — | — |
| 2018 | 78° | 51° | 65° | — | — |
| 2017 | 70° | 43° | 56° | — | — |
| 2016 | 75° | 45° | 60° | — | — |
| 2015 | 67° | 41° | 54° | 0.43" | — |
| 2014 | 74° | 45° | 59° | — | — |
| 2013 | 87° | 52° | 69° | 0.43" | — |
| 2012 | 69° | 49° | 59° | 0.1" | — |
| 2011 | 74° | 49° | 61° | — | — |
| 2010 | 72° | 53° | 62° | — | — |
| 2009 | 87° | 52° | 69° | — | — |
| 2008 | 68° | 46° | 57° | 0.03" | — |
| 2007 | 64° | 45° | 54° | 0.05" | — |
| 2006 | 69° | 42° | 56° | 0.76" | — |
| 2005 | 52° | 45° | 48° | 0.33" | — |
| 2004 | 76° | 34° | 55° | — | — |
| 2003 | 85° | 41° | 63° | — | — |
| 2002 | 62° | 32° | 47° | — | — |
| 2001 | 69° | 49° | 59° | — | — |
| 2000 | 57° | 48° | 53° | — | — |
| 1999 | 76° | 46° | 61° | — | — |
| 1998 | 82° | 53° | 68° | 0.03" | — |
| 1997 | 62° | 40° | 51° | — | — |
| 1996warmest | 94° | 59° | 76° | 0.97" | — |
| 1995 | 77° | 40° | 58° | — | — |
| 1994 | 72° | 37° | 54° | — | — |
| 1993 | 71° | 44° | 58° | 0.05" | — |
| 1992 | 88° | 36° | 62° | — | — |
| 1991 | 82° | 59° | 71° | — | — |
| 1990coldest | 45° | 43° | 44° | 0.84" | — |
| 1989 | 81° | 54° | 67° | — | — |
| 1988 | 69° | 50° | 60° | 0.51" | — |
| 1987 | 73° | 52° | 62° | — | — |
| 1986 | 79° | 64° | 71° | — | — |
| 1985 | 75° | 61° | 68° | 0.15" | — |
| 1984 | 70° | 53° | 61° | 0.2" | — |
| 1983 | 78° | 56° | 67° | — | — |
| 1982 | 73° | 48° | 61° | — | — |
| 1981 | 73° | 39° | 56° | — | — |
| 1980 | 53° | 46° | 50° | — | — |
| 1979 | 75° | 51° | 63° | — | — |
| 1978 | 78° | 46° | 62° | 0.13" | — |
| 1977 | 82° | 52° | 67° | — | — |
| 1976 | 74° | 37° | 55° | 1.35" | — |
| 1975 | 91° | 54° | 72° | 0.08" | — |
| 1974 | 67° | 47° | 57° | — | — |
| 1973 | 65° | 46° | 55° | 2.29" | — |
| 1972 | 77° | 48° | 63° | — | — |
| 1971 | 63° | 50° | 56° | — | — |
55 years of data from BROCKTON