Weather on August 21
Brockton, MA
55 Years of Data
Avg High
81°F
Avg Low
58°F
Warmest
2009
83°F avg
Coldest
1977
59°F avg
About This Date
August 21st in Brockton, MA typically brings warm summer weather, with average highs around 81°F and lows near 58°F. Over 55 years of records, the warmest August 21st was in 2009 (83°F average), while the coldest was 1977 (59°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 25% of August 21st dates historically, with the wettest August 21st recording 2.54" of rain. The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Brockton, MA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 55° | 63° | 0.18" | — |
| 2024 | 78° | 53° | 66° | — | — |
| 2023 | 90° | 63° | 76° | 2.41" | — |
| 2022 | 90° | 66° | 78° | — | — |
| 2021 | 92° | 71° | 81° | — | — |
| 2020 | 91° | 59° | 75° | — | — |
| 2019 | 86° | 63° | 74° | 1.75" | — |
| 2018 | 73° | 62° | 68° | — | — |
| 2017 | 87° | 58° | 72° | — | — |
| 2016 | 87° | 61° | 74° | — | — |
| 2015 | 86° | 73° | 80° | 1.78" | — |
| 2014 | 81° | 54° | 67° | — | — |
| 2013 | 89° | 61° | 75° | — | — |
| 2012 | 83° | 61° | 72° | — | — |
| 2011 | 85° | 65° | 75° | — | — |
| 2010 | 82° | 53° | 68° | — | — |
| 2009warmest | 90° | 76° | 83° | — | — |
| 2008 | 79° | 50° | 64° | — | — |
| 2007 | 67° | 52° | 59° | — | — |
| 2006 | 72° | 60° | 66° | — | — |
| 2005 | 86° | 61° | 73° | 0.28" | — |
| 2004 | 90° | 58° | 74° | — | — |
| 2003 | 89° | 63° | 76° | — | — |
| 2002 | 75° | 62° | 69° | 0.46" | — |
| 2001 | 86° | 69° | 78° | — | — |
| 2000 | 76° | 47° | 61° | — | — |
| 1999 | 67° | 60° | 63° | 0.33" | — |
| 1998 | 83° | 55° | 69° | — | — |
| 1997 | 65° | 54° | 59° | 0.18" | — |
| 1996 | 83° | 60° | 71° | 0.13" | — |
| 1995 | 94° | 49° | 71° | — | — |
| 1994 | 84° | 66° | 75° | 2.54" | — |
| 1993 | 79° | 53° | 66° | — | — |
| 1992 | 79° | 50° | 64° | — | — |
| 1991 | 67° | 58° | 62° | 1.42" | — |
| 1990 | 68° | 60° | 64° | — | — |
| 1989 | 85° | 66° | 75° | 0.51" | — |
| 1988 | 82° | 52° | 67° | — | — |
| 1987 | 84° | 56° | 70° | — | — |
| 1986 | 72° | 55° | 63° | 1.27" | — |
| 1985 | 79° | 54° | 66° | — | — |
| 1984 | 79° | 54° | 66° | — | — |
| 1983 | 83° | 55° | 69° | — | — |
| 1982 | 70° | 50° | 60° | — | — |
| 1981 | 81° | 55° | 68° | — | — |
| 1980 | 66° | 60° | 63° | 0.56" | — |
| 1979 | 76° | 55° | 65° | — | — |
| 1978 | 78° | 58° | 68° | — | — |
| 1977coldest | 75° | 42° | 59° | — | — |
| 1976 | 94° | 59° | 76° | — | — |
| 1975 | 79° | 43° | 61° | — | — |
| 1974 | 86° | 55° | 71° | — | — |
| 1973 | 75° | 54° | 64° | — | — |
| 1972 | 80° | 50° | 65° | — | — |
| 1971 | 85° | 63° | 74° | — | — |
55 years of data from BROCKTON