Weather on September 23 at Biscayne
Biscayne National Park
Based on 55 years of data from Miami, FL
Planning Your Visit
September 23rd in Biscayne National Park (via Miami, FL) typically brings warm fall weather, with average highs around 87°F and lows near 77°F. Over 55 years of records, the warmest September 23rd was in 1990 (87°F average), while the coldest was 1973 (77°F) — a 10°F range across recorded history. Rain or other precipitation has occurred on about 55% of September 23rd dates historically, with the wettest September 23rd recording 8.76" 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 23rd in Biscayne? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 89°F | 74°F | 0.25" | -- |
| 2024 | 90°F | 77°F | 0" | -- |
| 2023 | 88°F | 75°F | 0.05" | -- |
| 2022 | 91°F | 77°F | 0.13" | -- |
| 2021 | 85°F | 72°F | 0.97" | -- |
| 2020 | 87°F | 77°F | 0" | -- |
| 2019 | 85°F | 78°F | 0" | -- |
| 2018 | 88°F | 77°F | 0" | -- |
| 2017 | 88°F | 78°F | 0" | -- |
| 2016 | 89°F | 79°F | 0" | -- |
| 2015 | 88°F | 74°F | 2.29" | -- |
| 2014 | 85°F | 75°F | 0.66" | -- |
| 2013 | 88°F | 76°F | 0.64" | -- |
| 2012 | 85°F | 73°F | 8.76" | -- |
| 2011 | 88°F | 79°F | 0" | -- |
| 2010 | 88°F | 81°F | 0" | 0" |
| 2009 | 89°F | 78°F | 0.51" | 0" |
| 2008 | 89°F | 81°F | 0" | -- |
| 2007 | 88°F | 80°F | 0.43" | -- |
| 2006 | 87°F | 80°F | 0" | 0" |
| 2005 | 88°F | 78°F | 0.03" | 0" |
| 2004 | 83°F | 77°F | 1.96" | 0" |
| 2003 | 87°F | 73°F | 0" | 0" |
| 2002 | 87°F | 78°F | 2.29" | 0" |
| 2001 | 86°F | 78°F | 0" | 0" |
| 2000 | 88°F | 82°F | 0" | 0" |
| 1999 | 88°F | 75°F | 0" | 0" |
| 1998 | 87°F | 77°F | 0" | 0" |
| 1997 | 88°F | 76°F | 1.17" | 0" |
| 1996 | 86°F | 79°F | 0" | 0" |
| 1995 | 90°F | 74°F | 1.09" | 0" |
| 1994 | 86°F | 76°F | 1.02" | 0" |
| 1993 | 86°F | 79°F | 1.52" | 0" |
| 1992 | 83°F | 73°F | 2.29" | 0" |
| 1991 | 87°F | 77°F | 0" | 0" |
| 1990 | 93°F | 81°F | 0" | 0" |
| 1989 | 87°F | 74°F | 0" | 0" |
| 1988 | 86°F | 80°F | 0" | 0" |
| 1987 | 91°F | 75°F | 3.28" | 0" |
| 1986 | 85°F | 72°F | 4.88" | 0" |
| 1985 | 85°F | 78°F | 0" | 0" |
| 1984 | 84°F | 75°F | 0.41" | 0" |
| 1983 | 85°F | 74°F | 0.03" | 0" |
| 1982 | 85°F | 77°F | 0" | 0" |
| 1981 | 83°F | 75°F | 2.29" | 0" |
| 1980 | 87°F | 78°F | 0.64" | 0" |
| 1979 | 87°F | 80°F | 2.41" | 0" |
| 1978 | 84°F | 79°F | 0" | 0" |
| 1977 | 85°F | 75°F | 0.38" | 0" |
| 1976 | 86°F | 77°F | 0" | 0" |
| 1975 | 86°F | 80°F | 0" | 0" |
| 1974 | 86°F | 77°F | 0.13" | 0" |
| 1973 | 83°F | 71°F | 5.61" | 0" |
| 1972 | 85°F | 74°F | 0.2" | 0" |
| 1971 | 86°F | 78°F | 0.13" | 0" |