Weather on May 18 at Biscayne
Biscayne National Park
Based on 56 years of data from Miami, FL
Planning Your Visit
May 18th in Biscayne National Park (via Miami, FL) typically brings warm spring weather, with average highs around 84°F and lows near 74°F. Over 56 years of records, the warmest May 18th was in 2024 (88°F average), while the coldest was 1973 (71°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 30% of May 18th dates historically, with the wettest May 18th recording 10.36" of rain. The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
Planning for May 18th 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 |
|---|---|---|---|---|
| 2026 | 85°F | 77°F | 0.76" | -- |
| 2025 | 90°F | 78°F | 0" | -- |
| 2024 | 96°F | 80°F | 0" | -- |
| 2023 | 90°F | 73°F | 0.03" | -- |
| 2022 | 76°F | 70°F | 0" | -- |
| 2021 | 85°F | 70°F | 0" | -- |
| 2020 | 86°F | 77°F | 0" | -- |
| 2019 | 84°F | 72°F | 0" | -- |
| 2018 | 86°F | 77°F | 2.29" | -- |
| 2017 | 84°F | 78°F | 0" | -- |
| 2016 | 85°F | 80°F | 0" | -- |
| 2015 | 85°F | 75°F | 0.25" | -- |
| 2014 | 80°F | 69°F | 0" | -- |
| 2013 | 85°F | 77°F | 0" | -- |
| 2012 | 80°F | 72°F | 0" | -- |
| 2011 | 86°F | 69°F | 0" | -- |
| 2010 | 84°F | 73°F | 0.56" | 0" |
| 2009 | 83°F | 74°F | 0.76" | 0" |
| 2008 | 91°F | 76°F | 0" | -- |
| 2007 | 85°F | 75°F | 0" | 0" |
| 2006 | 84°F | 69°F | 2.16" | 0" |
| 2005 | 86°F | 78°F | 0" | 0" |
| 2004 | 80°F | 74°F | 0" | 0" |
| 2003 | 87°F | 79°F | 0" | 0" |
| 2002 | 87°F | 77°F | 0" | 0" |
| 2001 | 87°F | 68°F | 0" | 0" |
| 2000 | 83°F | 77°F | 0" | 0" |
| 1999 | 83°F | 73°F | 0.28" | 0" |
| 1998 | 83°F | 72°F | 0" | 0" |
| 1997 | 84°F | 77°F | 0.05" | 0" |
| 1996 | 82°F | 76°F | 0" | 0" |
| 1995 | 90°F | 81°F | 0" | 0" |
| 1994 | 86°F | 76°F | 0.71" | -- |
| 1993 | 83°F | 76°F | 0" | 0" |
| 1992 | 81°F | 74°F | 0" | 0" |
| 1991 | 83°F | 77°F | 0" | 0" |
| 1990 | 85°F | 77°F | 0" | 0" |
| 1989 | 86°F | 77°F | 0" | 0" |
| 1988 | 80°F | 70°F | 0.33" | 0" |
| 1987 | 81°F | 73°F | 0.38" | 0" |
| 1986 | 80°F | 75°F | 0" | 0" |
| 1985 | 90°F | 66°F | 0" | 0" |
| 1984 | 77°F | 73°F | 0" | 0" |
| 1983 | 82°F | 76°F | 0" | 0" |
| 1982 | 79°F | 75°F | 0" | 0" |
| 1981 | 83°F | 78°F | 0" | 0" |
| 1980 | 82°F | 79°F | 0" | 0" |
| 1979 | 80°F | 71°F | 0.3" | 0" |
| 1978 | 81°F | 71°F | 3.3" | 0" |
| 1977 | 78°F | 73°F | 0" | 0" |
| 1976 | 85°F | 72°F | 0" | 0" |
| 1975 | 88°F | 75°F | 0.05" | 0" |
| 1974 | 81°F | 74°F | 0.13" | 0" |
| 1973 | 79°F | 63°F | 0" | 0" |
| 1972 | 82°F | 69°F | 10.36" | 0" |
| 1971 | 83°F | 77°F | 0" | 0" |