Weather on September 21
West Palm Beach, FL
55 Years of Data
About This Date
September 21st in West Palm Beach, FL typically brings warm fall weather, with average highs around 89°F and lows near 75°F. Over 55 years of records, the warmest September 21st was in 1987 (85°F average), while the coldest was 1984 (78°F) — a 7°F range across recorded history. Rain or other precipitation has occurred on about 45% of September 21st dates historically, with the wettest September 21st recording 5.77" 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 West Palm Beach, FL? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 79° | 83° | 0.56" | — |
| 2024 | 91° | 75° | 83° | 0.71" | — |
| 2023 | 89° | 74° | 81° | — | — |
| 2022 | 90° | 77° | 83° | 1.17" | — |
| 2021 | 82° | 73° | 78° | 2.62" | — |
| 2020 | 85° | 79° | 82° | 0.46" | — |
| 2019 | 86° | 78° | 82° | — | — |
| 2018 | 90° | 75° | 82° | 0.03" | — |
| 2017 | 91° | 78° | 85° | 0.03" | — |
| 2016 | 91° | 76° | 83° | — | — |
| 2015 | 89° | 74° | 81° | 1.24" | — |
| 2014 | 89° | 75° | 82° | 1.5" | — |
| 2013 | 87° | 72° | 79° | — | — |
| 2012 | 88° | 74° | 81° | 2.21" | — |
| 2011 | 90° | 81° | 85° | — | — |
| 2010 | 90° | 81° | 85° | 0.05" | — |
| 2009 | 90° | 78° | 84° | — | — |
| 2008 | 87° | 73° | 80° | 0.33" | — |
| 2007 | 89° | 73° | 81° | 2.9" | — |
| 2006 | 90° | 73° | 81° | — | — |
| 2005 | 90° | 73° | 81° | 1.12" | — |
| 2004 | 84° | 77° | 81° | 1.47" | — |
| 2003 | 89° | 80° | 85° | — | — |
| 2002 | 89° | 77° | 83° | — | — |
| 2001 | 89° | 73° | 81° | — | — |
| 2000 | 89° | 81° | 85° | — | — |
| 1999 | 86° | 76° | 81° | — | — |
| 1998 | 90° | 75° | 82° | — | — |
| 1997 | 88° | 72° | 80° | — | — |
| 1996 | 92° | 72° | 82° | 1.63" | — |
| 1995 | 89° | 75° | 82° | — | — |
| 1994 | 84° | 72° | 78° | — | — |
| 1993 | 90° | 80° | 85° | — | — |
| 1992 | 89° | 75° | 82° | — | — |
| 1991 | 91° | 75° | 83° | — | — |
| 1990 | 90° | 77° | 83° | — | — |
| 1989 | 91° | 76° | 83° | — | — |
| 1988 | 89° | 75° | 82° | — | — |
| 1987warmest | 93° | 77° | 85° | 2.21" | — |
| 1986 | 89° | 74° | 81° | — | — |
| 1985 | 89° | 70° | 79° | — | — |
| 1984coldest | 83° | 73° | 78° | 1.73" | — |
| 1983 | 90° | 77° | 83° | — | — |
| 1982 | 92° | 74° | 83° | — | — |
| 1981 | 86° | 71° | 79° | 2.64" | — |
| 1980 | 91° | 77° | 84° | — | — |
| 1979 | 87° | 75° | 81° | 5.77" | — |
| 1978 | 88° | 77° | 82° | 0.03" | — |
| 1977 | 88° | 74° | 81° | — | — |
| 1976 | 88° | 70° | 79° | 1.78" | — |
| 1975 | 88° | 80° | 84° | 0.05" | — |
| 1974 | 88° | 76° | 82° | 0.38" | — |
| 1973 | 90° | 75° | 82° | — | — |
| 1972 | 88° | 74° | 81° | — | — |
| 1971 | 88° | 70° | 79° | 0.36" | — |