Weather on August 20
Cambridge, MA
55 Years of Data
Avg High
81°F
Avg Low
60°F
Warmest
2019
81°F avg
Coldest
1990
56°F avg
About This Date
August 20th in Cambridge, MA typically brings warm summer weather, with average highs around 81°F and lows near 60°F. Over 55 years of records, the warmest August 20th was in 2019 (81°F average), while the coldest was 1990 (56°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 38% of August 20th dates historically, with the wettest August 20th recording 5.59" 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 20th in Cambridge, MA? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 52° | 63° | — | — |
| 2024 | 78° | 60° | 69° | 0.43" | — |
| 2023 | 72° | 59° | 65° | 0.03" | — |
| 2022 | 93° | 65° | 79° | — | — |
| 2021 | 85° | 71° | 78° | 2.31" | — |
| 2020 | 80° | 54° | 67° | 0.25" | — |
| 2019warmest | 95° | 66° | 81° | 0.03" | — |
| 2018 | 74° | 65° | 69° | 0.03" | — |
| 2017 | 89° | 66° | 78° | — | — |
| 2016 | 89° | 65° | 77° | — | — |
| 2015 | 89° | 70° | 79° | — | — |
| 2014 | 79° | 55° | 67° | — | — |
| 2013 | 84° | 62° | 73° | — | — |
| 2012 | 74° | 58° | 66° | — | — |
| 2011 | 87° | 67° | 77° | 0.91" | — |
| 2010 | 87° | 65° | 76° | — | — |
| 2009 | 90° | 71° | 80° | — | — |
| 2008 | 79° | 53° | 66° | 0.03" | — |
| 2007 | 68° | 56° | 62° | — | — |
| 2006 | 84° | 63° | 73° | 2.03" | — |
| 2005 | 74° | 65° | 69° | — | — |
| 2004 | 90° | 70° | 80° | 0.28" | — |
| 2003 | 89° | 69° | 79° | — | — |
| 2002 | 93° | 66° | 80° | 0.51" | — |
| 2001 | 85° | 71° | 78° | 0.64" | — |
| 2000 | 78° | 55° | 67° | — | — |
| 1999 | 84° | 62° | 73° | — | — |
| 1998 | 71° | 49° | 60° | — | — |
| 1997 | — | 52° | — | — | — |
| 1996 | 81° | 56° | 68° | — | — |
| 1995 | 79° | 62° | 70° | — | — |
| 1994 | 69° | 63° | 66° | 0.69" | — |
| 1993 | 79° | 59° | 69° | — | — |
| 1992 | 81° | 55° | 68° | — | — |
| 1991 | 69° | 58° | 63° | 5.59" | — |
| 1990coldest | 62° | 50° | 56° | 0.76" | — |
| 1989 | 77° | 61° | 69° | 0.1" | — |
| 1988 | 87° | 52° | 69° | — | — |
| 1987 | 92° | 63° | 77° | — | — |
| 1986 | 72° | 60° | 66° | — | — |
| 1985 | 64° | 67° | 65° | 0.18" | — |
| 1984 | 77° | 40° | 58° | 0.13" | — |
| 1983 | 93° | 47° | 70° | — | — |
| 1982 | 82° | 62° | 72° | — | — |
| 1981 | — | 46° | — | — | — |
| 1980 | 72° | 60° | 66° | 0.03" | — |
| 1979 | 64° | 56° | 60° | 0.05" | — |
| 1978 | 84° | 65° | 74° | — | — |
| 1977 | 73° | 53° | 63° | — | — |
| 1976 | 85° | 53° | 69° | — | — |
| 1975 | 77° | 56° | 66° | — | — |
| 1974 | 88° | 60° | 74° | — | — |
| 1973 | 76° | 58° | 67° | — | — |
| 1972 | 83° | 50° | 66° | — | — |
| 1971 | 88° | 66° | 77° | 1.02" | — |
55 years of data from CHESTNUT HILL