Weather on August 18 at Dry Tortugas
Dry Tortugas National Park
Based on 55 years of data from Key West, FL
Planning Your Visit
August 18th in Dry Tortugas National Park (via Key West, FL) typically brings hot summer weather, with average highs around 90°F and lows near 80°F. Over 55 years of records, the warmest August 18th was in 2019 (91°F average), while the coldest was 1976 (78°F) — a 13°F range across recorded history. Rain or other precipitation has occurred on about 40% of August 18th dates historically, with the wettest August 18th recording 4.93" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Dry Tortugas? 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 | 99°F | 81°F | 0" | -- |
| 2024 | 90°F | 81°F | 0.69" | -- |
| 2023 | 94°F | 82°F | 0" | -- |
| 2022 | 97°F | 79°F | 0.43" | -- |
| 2021 | 89°F | 82°F | 0" | -- |
| 2020 | 95°F | 82°F | 0" | -- |
| 2019 | 95°F | 86°F | 0" | -- |
| 2018 | 90°F | 81°F | 0.03" | -- |
| 2017 | -- | 83°F | 0" | -- |
| 2016 | 88°F | 81°F | 0" | -- |
| 2015 | 92°F | 82°F | 0" | -- |
| 2014 | 92°F | 84°F | 0" | -- |
| 2013 | 88°F | 81°F | 0.23" | -- |
| 2012 | 92°F | 81°F | 0" | -- |
| 2011 | 91°F | 78°F | 0.08" | -- |
| 2010 | 90°F | 81°F | 0" | 0" |
| 2009 | 87°F | 82°F | 0" | 0" |
| 2008 | 92°F | 74°F | 0" | 0" |
| 2007 | 87°F | 76°F | 0.69" | 0" |
| 2006 | 90°F | 83°F | 0" | 0" |
| 2005 | 96°F | 81°F | 0" | 0" |
| 2004 | 93°F | 80°F | 0" | -- |
| 2003 | 89°F | 81°F | -- | -- |
| 2002 | 89°F | 81°F | 0" | 0" |
| 2001 | 91°F | 80°F | 0.58" | 0" |
| 2000 | 91°F | 80°F | 0.03" | -- |
| 1999 | 87°F | 74°F | 4.09" | -- |
| 1998 | 91°F | 77°F | 0.53" | 0" |
| 1997 | 90°F | 84°F | 0" | 0" |
| 1996 | 90°F | 81°F | 0.94" | 0" |
| 1995 | 89°F | 79°F | 0" | 0" |
| 1994 | 91°F | 82°F | 0" | 0" |
| 1993 | 91°F | 81°F | 0" | 0" |
| 1992 | 91°F | 82°F | 0" | 0" |
| 1991 | 91°F | 84°F | 0" | 0" |
| 1990 | 88°F | 76°F | 1.17" | 0" |
| 1989 | 88°F | 77°F | 0.61" | 0" |
| 1988 | 90°F | 80°F | 0" | 0" |
| 1987 | 91°F | 81°F | 0" | 0" |
| 1986 | 84°F | 76°F | 1.32" | 0" |
| 1985 | 90°F | 80°F | 0" | 0" |
| 1984 | 90°F | 78°F | 4.39" | 0" |
| 1983 | 91°F | 76°F | 0.2" | 0" |
| 1982 | 87°F | 78°F | 0" | 0" |
| 1981 | 81°F | 75°F | 4.93" | 0" |
| 1980 | 90°F | 76°F | 2.31" | 0" |
| 1979 | 90°F | 81°F | 0" | 0" |
| 1978 | 89°F | 83°F | 0" | 0" |
| 1977 | 89°F | 82°F | 0" | 0" |
| 1976 | 82°F | 74°F | 1.8" | 0" |
| 1975 | 91°F | 83°F | 0" | 0" |
| 1974 | 90°F | 82°F | 0.05" | 0" |
| 1973 | 89°F | 80°F | 0.13" | 0" |
| 1972 | 89°F | 81°F | 0" | 0" |
| 1971 | 86°F | 81°F | 0.08" | 0" |