Weather on August 21
Miami, FL
55 Years of Data
Avg High
89°F
Avg Low
78°F
Warmest
1983
88°F avg
Coldest
2006
77°F avg
About This Date
August 21st in Miami, FL typically brings warm summer weather, with average highs around 89°F and lows near 78°F. Over 55 years of records, the warmest August 21st was in 1983 (88°F average), while the coldest was 2006 (77°F) — a 11°F range across recorded history. Rain or other precipitation has occurred on about 51% of August 21st dates historically, with the wettest August 21st recording 7.49" of rain. The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Miami, FL? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 95° | 79° | 87° | — | — |
| 2024 | 92° | 81° | 86° | — | — |
| 2023 | 89° | 80° | 85° | 0.38" | — |
| 2022 | 92° | 83° | 87° | 0.08" | — |
| 2021 | 91° | 78° | 85° | — | — |
| 2020 | 89° | 80° | 85° | 2.84" | — |
| 2019 | 90° | 82° | 86° | — | — |
| 2018 | 89° | 82° | 86° | — | — |
| 2017 | 88° | 77° | 82° | 2.41" | — |
| 2016 | 88° | 80° | 84° | — | — |
| 2015 | 89° | 82° | 86° | — | — |
| 2014 | 89° | 80° | 85° | — | — |
| 2013 | 92° | 80° | 86° | 2.03" | — |
| 2012 | 90° | 79° | 84° | — | — |
| 2011 | 88° | 76° | 82° | — | — |
| 2010 | 90° | 78° | 84° | — | — |
| 2009 | 89° | 81° | 85° | — | — |
| 2008 | 92° | 72° | 82° | 2.97" | — |
| 2007 | 88° | 82° | 85° | — | — |
| 2006coldest | 85° | 70° | 77° | 3.07" | — |
| 2005 | 90° | 78° | 84° | 1.19" | — |
| 2004 | 93° | 78° | 86° | 1.32" | — |
| 2003 | 87° | 72° | 79° | 7.49" | — |
| 2002 | 88° | 78° | 83° | — | — |
| 2001 | 90° | 78° | 84° | 0.03" | — |
| 2000 | 88° | 82° | 85° | 0.05" | — |
| 1999 | 90° | 78° | 84° | 0.05" | — |
| 1998 | 89° | 75° | 82° | 0.48" | — |
| 1997 | 94° | 72° | 83° | 5.61" | — |
| 1996 | 85° | 72° | 78° | 1.96" | — |
| 1995 | 90° | 82° | 86° | — | — |
| 1994 | 90° | 82° | 86° | — | — |
| 1993 | 91° | 81° | 86° | — | — |
| 1992 | 89° | 79° | 84° | 0.1" | — |
| 1991 | 91° | 78° | 85° | 0.46" | — |
| 1990 | 90° | 82° | 86° | — | — |
| 1989 | 89° | 79° | 84° | — | — |
| 1988 | 87° | 79° | 83° | 0.94" | — |
| 1987 | 89° | 81° | 85° | — | — |
| 1986 | 87° | 78° | 83° | — | — |
| 1985 | 88° | 76° | 82° | 0.3" | — |
| 1984 | 90° | 74° | 82° | 4.19" | — |
| 1983warmest | 94° | 82° | 88° | — | — |
| 1982 | 87° | 82° | 85° | — | — |
| 1981 | 86° | 75° | 81° | 1.4" | — |
| 1980 | 95° | 72° | 83° | 5.59" | — |
| 1979 | 89° | 77° | 83° | 0.38" | — |
| 1978 | 86° | 80° | 83° | — | — |
| 1977 | 89° | 76° | 82° | 0.43" | — |
| 1976 | 86° | 81° | 83° | — | — |
| 1975 | 85° | 76° | 80° | 0.1" | — |
| 1974 | 88° | 81° | 84° | — | — |
| 1973 | 84° | 75° | 80° | 2.08" | — |
| 1972 | 87° | 76° | 81° | 0.76" | — |
| 1971 | 94° | 77° | 85° | — | — |
55 years of data from MIAMI BAYFRONT PARK