Weather on August 21
Stamford, CT
55 Years of Data
Avg High
82°F
Avg Low
59°F
Warmest
2005
80°F avg
Coldest
1977
61°F avg
About This Date
August 21st in Stamford, CT typically brings warm summer weather, with average highs around 82°F and lows near 59°F. Over 55 years of records, the warmest August 21st was in 2005 (80°F average), while the coldest was 1977 (61°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 29% of August 21st dates historically, with the wettest August 21st recording 6.4" of rain. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Stamford, CT? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 58° | 65° | 0.1" | — |
| 2024 | 73° | 55° | 64° | — | — |
| 2023 | 86° | 65° | 75° | — | — |
| 2022 | 82° | 62° | 72° | — | — |
| 2021 | 81° | 69° | 75° | 0.15" | — |
| 2020 | 85° | 56° | 70° | — | — |
| 2019 | 86° | 69° | 78° | — | — |
| 2018 | 77° | 64° | 71° | — | — |
| 2017 | 88° | 61° | 74° | — | — |
| 2016 | 87° | 69° | 78° | 0.33" | — |
| 2015 | 88° | 66° | 77° | 1.04" | — |
| 2014 | 82° | 62° | 72° | — | — |
| 2013 | 92° | 60° | 76° | — | — |
| 2012 | 80° | 63° | 71° | — | — |
| 2011 | 82° | 67° | 74° | 0.79" | — |
| 2010 | 80° | 60° | 70° | — | — |
| 2009 | 89° | 70° | 79° | 0.84" | — |
| 2008 | 78° | 52° | 65° | — | — |
| 2007 | 68° | 55° | 62° | 2.9" | — |
| 2006 | 84° | 64° | 74° | — | — |
| 2005warmest | 90° | 71° | 80° | 0.03" | — |
| 2004 | 88° | 66° | 77° | 6.4" | — |
| 2003 | 89° | 62° | 76° | — | — |
| 2002 | 85° | 59° | 72° | — | — |
| 2001 | 82° | 62° | 72° | 0.43" | — |
| 2000 | 79° | 48° | 63° | — | — |
| 1999 | 66° | 56° | 61° | 1.27" | — |
| 1998 | 87° | 52° | 69° | — | — |
| 1997 | 68° | 59° | 64° | 3.86" | — |
| 1996 | 83° | 62° | 72° | — | — |
| 1995 | 94° | 53° | 73° | — | — |
| 1994 | 84° | 65° | 74° | — | — |
| 1993 | 82° | 65° | 73° | — | — |
| 1992 | 79° | 47° | 63° | — | — |
| 1991 | 77° | 65° | 71° | 3.05" | — |
| 1990 | 69° | 55° | 62° | 0.15" | — |
| 1989 | 87° | 65° | 76° | — | — |
| 1988 | 83° | 53° | 68° | — | — |
| 1987 | 86° | 51° | 69° | — | — |
| 1986 | 74° | 63° | 68° | 0.28" | — |
| 1985 | 74° | 58° | 66° | 0.03" | — |
| 1984 | 82° | 48° | 65° | — | — |
| 1983 | 94° | 58° | 76° | — | — |
| 1982 | 76° | 59° | 67° | — | — |
| 1981 | 82° | 49° | 65° | — | — |
| 1980 | 74° | 62° | 68° | — | — |
| 1979 | 79° | 61° | 70° | — | — |
| 1978 | 85° | 61° | 73° | — | — |
| 1977coldest | 78° | 45° | 61° | — | — |
| 1976 | 90° | 59° | 74° | — | — |
| 1975 | 78° | 50° | 64° | — | — |
| 1974 | 89° | 60° | 75° | — | — |
| 1973 | 79° | 56° | 67° | — | — |
| 1972 | 81° | 51° | 66° | — | — |
| 1971 | 86° | 62° | 74° | — | — |
55 years of data from STAMFORD 5 N