Weather on September 21
Miami, FL
55 Years of Data
Avg High
87°F
Avg Low
78°F
Warmest
2011
86°F avg
Coldest
1981
78°F avg
About This Date
September 21st in Miami, FL typically brings warm fall weather, with average highs around 87°F and lows near 78°F. Over 55 years of records, the warmest September 21st was in 2011 (86°F average), while the coldest was 1981 (78°F) — a 8°F range across recorded history. Rain or other precipitation has occurred on about 44% of September 21st dates historically, with the wettest September 21st recording 5.46" 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 September 21st in Miami, FL? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 77° | 82° | 0.71" | — |
| 2024 | 90° | 76° | 83° | 0.05" | — |
| 2023 | 89° | 76° | 82° | 0.38" | — |
| 2022 | 86° | 76° | 81° | — | — |
| 2021 | 91° | 76° | 83° | — | — |
| 2020 | 87° | 79° | 83° | — | — |
| 2019 | 84° | 79° | 81° | — | — |
| 2018 | 87° | 77° | 82° | — | — |
| 2017 | 86° | 77° | 82° | — | — |
| 2016 | 89° | 79° | 84° | — | — |
| 2015 | 92° | 74° | 83° | 1.02" | — |
| 2014 | 87° | 73° | 80° | 0.76" | — |
| 2013 | 85° | 79° | 82° | — | — |
| 2012 | 89° | 77° | 83° | 0.94" | — |
| 2011warmest | 89° | 83° | 86° | — | — |
| 2010 | 88° | 81° | 84° | — | — |
| 2009 | 88° | 78° | 83° | — | — |
| 2008 | 87° | 80° | 84° | — | — |
| 2007 | 90° | 75° | 82° | 0.08" | — |
| 2006 | 89° | 76° | 82° | 0.23" | — |
| 2005 | 87° | 74° | 80° | 1.57" | — |
| 2004 | 86° | 73° | 80° | 0.2" | — |
| 2003 | 85° | 79° | 82° | 1.52" | — |
| 2002 | 88° | 80° | 84° | 0.03" | — |
| 2001 | 89° | 76° | 82° | — | — |
| 2000 | 88° | 82° | 85° | — | — |
| 1999 | 83° | 76° | 79° | 2.54" | — |
| 1998 | 87° | 72° | 79° | 5.46" | — |
| 1997 | 88° | 78° | 83° | — | — |
| 1996 | 90° | 77° | 83° | 0.38" | — |
| 1995 | 87° | 83° | 85° | — | — |
| 1994 | 86° | 76° | 81° | 1.27" | — |
| 1993 | 88° | 82° | 85° | — | — |
| 1992 | 89° | 80° | 85° | — | — |
| 1991 | 87° | 78° | 83° | 0.13" | — |
| 1990 | 88° | 81° | 84° | — | — |
| 1989 | 93° | 71° | 82° | — | — |
| 1988 | 86° | 80° | 83° | — | — |
| 1987 | 88° | 80° | 84° | — | — |
| 1986 | 84° | 73° | 79° | 4.17" | — |
| 1985 | 87° | 73° | 80° | — | — |
| 1984 | 83° | 77° | 80° | 0.48" | — |
| 1983 | 87° | 81° | 84° | — | — |
| 1982 | 87° | 78° | 83° | — | — |
| 1981coldest | 83° | 74° | 78° | 1.22" | — |
| 1980 | 85° | 80° | 82° | — | — |
| 1979 | 86° | 82° | 84° | 0.71" | — |
| 1978 | 85° | 80° | 82° | — | — |
| 1977 | 87° | 79° | 83° | 0.25" | — |
| 1976 | 88° | 80° | 84° | — | — |
| 1975 | 85° | 80° | 82° | 0.56" | — |
| 1974 | 85° | 79° | 82° | — | — |
| 1973 | 88° | 78° | 83° | — | — |
| 1972 | 86° | 75° | 81° | 0.13" | — |
| 1971 | 87° | 79° | 83° | — | — |
55 years of data from MIAMI BAYFRONT PARK