Weather on August 31 at Biscayne
Biscayne National Park
Based on 55 years of data from Miami, FL
Planning Your Visit
August 31st in Biscayne National Park (via Miami, FL) typically brings warm summer weather, with average highs around 88°F and lows near 78°F. Over 55 years of records, the warmest August 31st was in 1998 (88°F average), while the coldest was 1973 (76°F) — a 12°F range across recorded history. Rain or other precipitation has occurred on about 51% of August 31st dates historically, with the wettest August 31st recording 12.32" of rain. The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
Planning for August 31st 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 | 79°F | 0.91" | -- |
| 2024 | 89°F | 77°F | 0.15" | -- |
| 2023 | 93°F | 76°F | 0" | -- |
| 2022 | 92°F | 75°F | 0" | -- |
| 2021 | 89°F | 77°F | 0" | -- |
| 2020 | 86°F | 79°F | 0" | -- |
| 2019 | 89°F | 75°F | 1.78" | -- |
| 2018 | 86°F | 80°F | 0" | -- |
| 2017 | 89°F | 81°F | 0" | -- |
| 2016 | 85°F | 74°F | 4.78" | -- |
| 2015 | 83°F | 75°F | 1.27" | -- |
| 2014 | 89°F | 83°F | 0" | -- |
| 2013 | 86°F | 75°F | 0" | -- |
| 2012 | 88°F | 82°F | 0" | -- |
| 2011 | 85°F | 76°F | 1.63" | -- |
| 2010 | 86°F | 76°F | 3.73" | 0" |
| 2009 | 89°F | 77°F | 0" | 0" |
| 2008 | 86°F | 77°F | 1.6" | 0" |
| 2007 | 91°F | 80°F | 0" | 0" |
| 2006 | 93°F | 77°F | 0.18" | -- |
| 2005 | 90°F | 81°F | 0.71" | 0" |
| 2004 | 88°F | 81°F | 0" | 0" |
| 2003 | 87°F | 78°F | 0.1" | 0" |
| 2002 | 88°F | 76°F | 0.18" | 0" |
| 2001 | 91°F | 81°F | 0" | 0" |
| 2000 | 88°F | 79°F | 2.95" | 0" |
| 1999 | 91°F | 80°F | 0.33" | 0" |
| 1998 | 95°F | 80°F | 0" | 0" |
| 1997 | 86°F | 78°F | 0.2" | 0" |
| 1996 | 93°F | 81°F | 0" | 0" |
| 1995 | 92°F | 80°F | 0" | 0" |
| 1994 | 87°F | 78°F | 0" | 0" |
| 1993 | 88°F | 80°F | 0" | 0" |
| 1992 | 88°F | 81°F | 0.89" | 0" |
| 1991 | 87°F | 80°F | 1.4" | 0" |
| 1990 | 91°F | 81°F | 0" | 0" |
| 1989 | 90°F | 81°F | 0" | 0" |
| 1988 | 86°F | 73°F | 1.65" | 0" |
| 1987 | 88°F | 83°F | 0" | 0" |
| 1986 | 87°F | 73°F | 1.09" | 0" |
| 1985 | 87°F | 79°F | 0" | 0" |
| 1984 | 85°F | 77°F | 0.2" | 0" |
| 1983 | 88°F | 79°F | 0.08" | 0" |
| 1982 | 88°F | 81°F | 0" | 0" |
| 1981 | 92°F | 78°F | 1.4" | 0" |
| 1980 | 87°F | 78°F | 0.08" | 0" |
| 1979 | 86°F | 77°F | 0" | 0" |
| 1978 | 85°F | 75°F | 0.23" | 0" |
| 1977 | 87°F | 78°F | 0.23" | 0" |
| 1976 | 84°F | 77°F | 0.13" | 0" |
| 1975 | 87°F | 78°F | 0" | 0" |
| 1974 | 86°F | 80°F | 0" | 0" |
| 1973 | 80°F | 72°F | 12.32" | 0" |
| 1972 | 86°F | 74°F | 0.13" | 0" |
| 1971 | 86°F | 80°F | 0" | 0" |