Weather on August 21
Lowell, MA
55 Years of Data
Avg High
80°F
Avg Low
56°F
Warmest
2015
80°F avg
Coldest
1982
57°F avg
About This Date
August 21st in Lowell, MA typically brings warm summer weather, with average highs around 80°F and lows near 56°F. Over 55 years of records, the warmest August 21st was in 2015 (80°F average), while the coldest was 1982 (57°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 24% of August 21st dates historically, with the wettest August 21st recording 2.97" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for August 21st in Lowell, MA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 62° | 54° | 58° | 0.64" | — |
| 2024 | 68° | 52° | 60° | — | — |
| 2023 | 83° | 56° | 69° | — | — |
| 2022 | 95° | 62° | 79° | — | — |
| 2021 | 84° | 70° | 77° | 0.25" | — |
| 2020 | 81° | 55° | 68° | — | — |
| 2019 | 89° | 63° | 76° | — | — |
| 2018 | 79° | 58° | 68° | — | — |
| 2017 | 82° | — | — | — | — |
| 2016 | 85° | 63° | 74° | — | — |
| 2015warmest | 89° | 72° | 80° | — | — |
| 2014 | 82° | 52° | 67° | — | — |
| 2013 | 87° | 59° | 73° | — | — |
| 2012 | 79° | 56° | 67° | — | — |
| 2011 | 87° | 62° | 75° | — | — |
| 2010 | 83° | 52° | 67° | — | — |
| 2009 | 90° | 69° | 79° | 0.28" | — |
| 2008 | 74° | 46° | 60° | — | — |
| 2007 | 72° | 48° | 60° | — | — |
| 2006 | 75° | 64° | 70° | 2.87" | — |
| 2005 | 82° | 65° | 73° | — | — |
| 2004 | 88° | 68° | 78° | 2.24" | — |
| 2003 | 88° | 64° | 76° | — | — |
| 2002 | 80° | 59° | 70° | 0.23" | — |
| 2001 | 79° | 65° | 72° | — | — |
| 2000 | 72° | 48° | 60° | — | — |
| 1999 | 80° | 53° | 67° | 0.1" | — |
| 1998 | 79° | 51° | 65° | — | — |
| 1997 | 78° | 52° | 65° | 0.76" | — |
| 1996 | 85° | 54° | 69° | 0.05" | — |
| 1995 | 84° | 47° | 65° | — | — |
| 1994 | 82° | 65° | 73° | — | — |
| 1993 | 83° | 60° | 71° | 0.18" | — |
| 1992 | 74° | 47° | 60° | — | — |
| 1991 | 75° | 58° | 66° | 2.97" | — |
| 1990 | 73° | 55° | 64° | — | — |
| 1989 | 83° | 65° | 74° | 0.99" | — |
| 1988 | 80° | 48° | 64° | — | — |
| 1987 | 85° | 53° | 69° | — | — |
| 1986 | 80° | 55° | 68° | — | — |
| 1985 | 77° | 54° | 65° | — | — |
| 1984 | 78° | 48° | 63° | — | — |
| 1983 | 82° | 58° | 70° | — | — |
| 1982coldest | 69° | 45° | 57° | — | — |
| 1981 | 83° | 45° | 64° | — | — |
| 1980 | 69° | 58° | 63° | 0.05" | — |
| 1979 | 76° | 56° | 66° | — | — |
| 1978 | 81° | 58° | 69° | — | — |
| 1977 | 76° | 43° | 59° | — | — |
| 1976 | 85° | 51° | 68° | — | — |
| 1975 | 75° | 49° | 62° | — | — |
| 1974 | 84° | 57° | 71° | — | — |
| 1973 | 79° | 52° | 65° | — | — |
| 1972 | 78° | 48° | 63° | — | — |
| 1971 | 85° | 61° | 73° | — | — |
55 years of data from LOWELL