Weather on August 20 at Biscayne
Biscayne National Park
Based on 55 years of data from Miami, FL
Planning Your Visit
August 20th in Biscayne National Park (via Miami, FL) typically brings warm summer weather, with average highs around 89°F and lows near 79°F. Over 55 years of records, the warmest August 20th was in 1984 (89°F average), while the coldest was 1975 (79°F) — a 10°F range across recorded history. Rain or other precipitation has occurred on about 44% of August 20th dates historically, with the wettest August 20th recording 4.01" 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 August 20th 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 | 92°F | 77°F | 0.66" | -- |
| 2024 | 90°F | 79°F | 0.08" | -- |
| 2023 | 89°F | 77°F | 1.02" | -- |
| 2022 | 93°F | 81°F | 0.38" | -- |
| 2021 | 92°F | 77°F | 0" | -- |
| 2020 | 87°F | 78°F | 0.41" | -- |
| 2019 | 93°F | 78°F | 0.2" | -- |
| 2018 | 89°F | 80°F | 0" | -- |
| 2017 | 92°F | 81°F | 0" | -- |
| 2016 | 88°F | 78°F | 0" | -- |
| 2015 | 90°F | 81°F | 0" | -- |
| 2014 | 89°F | 81°F | 0" | -- |
| 2013 | 90°F | 80°F | 0" | -- |
| 2012 | 90°F | 81°F | 0" | -- |
| 2011 | 88°F | 76°F | 0.25" | -- |
| 2010 | 90°F | 80°F | 0" | 0" |
| 2009 | 87°F | 81°F | 0" | 0" |
| 2008 | 91°F | 74°F | -- | 0" |
| 2007 | 87°F | 83°F | 0.05" | 0" |
| 2006 | 84°F | 75°F | 0.56" | -- |
| 2005 | 91°F | 78°F | 1.45" | 0" |
| 2004 | 91°F | 78°F | 0" | 0" |
| 2003 | 88°F | 72°F | 1.02" | 0" |
| 2002 | 91°F | 71°F | 0.56" | 0" |
| 2001 | 93°F | 78°F | 0.03" | 0" |
| 2000 | 88°F | 80°F | 0" | 0" |
| 1999 | 91°F | 82°F | 0" | 0" |
| 1998 | 86°F | 77°F | 0.51" | 0" |
| 1997 | 92°F | 84°F | 0" | 0" |
| 1996 | 86°F | 77°F | 0.36" | 0" |
| 1995 | 92°F | 83°F | 0" | 0" |
| 1994 | 89°F | 82°F | 0" | 0" |
| 1993 | 90°F | 80°F | 0" | 0" |
| 1992 | 89°F | 81°F | 0" | 0" |
| 1991 | 91°F | 77°F | 0.56" | 0" |
| 1990 | 90°F | 81°F | 0" | 0" |
| 1989 | 87°F | 73°F | 0.28" | 0" |
| 1988 | 85°F | 74°F | 4.01" | 0" |
| 1987 | 88°F | 80°F | 0.74" | 0" |
| 1986 | 88°F | 79°F | 0" | 0" |
| 1985 | 89°F | 83°F | 0" | 0" |
| 1984 | 95°F | 83°F | 0" | 0" |
| 1983 | 88°F | 82°F | 0" | 0" |
| 1982 | 87°F | 80°F | 0.28" | 0" |
| 1981 | 87°F | 78°F | 0.15" | 0" |
| 1980 | 89°F | 80°F | 0" | 0" |
| 1979 | 87°F | 79°F | 0" | 0" |
| 1978 | 86°F | 77°F | 0" | 0" |
| 1977 | 87°F | 79°F | 0" | 0" |
| 1976 | 89°F | 77°F | 0.03" | 0" |
| 1975 | 87°F | 71°F | 1.22" | 0" |
| 1974 | 90°F | 79°F | 0" | 0" |
| 1973 | 82°F | 78°F | 0.13" | 0" |
| 1972 | 89°F | 78°F | 0" | 0" |
| 1971 | 94°F | 78°F | 0" | 0" |