Weather on April 21 at Biscayne
Biscayne National Park
FLSoutheast
Avg High81°F
Avg Low71°F
Warmest202087°F
Coldest197871°F
Based on 56 years of data from Miami, FL
Planning Your Visit
April 21st in Biscayne National Park (via Miami, FL) typically brings warm spring weather, with average highs around 81°F and lows near 71°F. Over 56 years of records, the warmest April 21st was in 2020 (87°F average), while the coldest was 1978 (71°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 20% of April 21st dates historically, with the wettest April 21st recording 3.02" of rain. The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
Planning for April 21st in Biscayne? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 88°F | 71°F | 0.15" | -- |
| 2025 | 83°F | 73°F | 0" | -- |
| 2024 | 86°F | 70°F | 0" | -- |
| 2023 | 83°F | 71°F | 0" | -- |
| 2022 | 74°F | 68°F | 0" | -- |
| 2021 | 80°F | 68°F | 1.47" | -- |
| 2020 | 93°F | 81°F | 0" | -- |
| 2019 | 82°F | 59°F | 0" | -- |
| 2018 | 82°F | 75°F | 0" | -- |
| 2017 | 79°F | 71°F | 0" | -- |
| 2016 | 79°F | 72°F | 0" | -- |
| 2015 | 86°F | 76°F | 0" | -- |
| 2014 | 77°F | 65°F | 0" | -- |
| 2013 | 86°F | 72°F | 3.02" | -- |
| 2012 | 81°F | 70°F | 1.65" | -- |
| 2011 | 83°F | 76°F | 0" | -- |
| 2010 | 79°F | 65°F | 1.02" | 0" |
| 2009 | 81°F | 69°F | 1.14" | 0" |
| 2008 | 80°F | 69°F | 0" | -- |
| 2007 | 77°F | 70°F | 0" | -- |
| 2006 | 84°F | 75°F | 0" | 0" |
| 2005 | 75°F | 69°F | 0" | 0" |
| 2004 | 77°F | 71°F | 0" | 0" |
| 2003 | 82°F | 75°F | 0" | 0" |
| 2002 | 85°F | 71°F | 0" | 0" |
| 2001 | 82°F | 69°F | 0.03" | 0" |
| 2000 | 84°F | 72°F | 0" | 0" |
| 1999 | 78°F | 66°F | 0" | 0" |
| 1998 | 82°F | 74°F | 0" | 0" |
| 1997 | 81°F | 67°F | 0" | 0" |
| 1996 | 78°F | 74°F | 0" | 0" |
| 1995 | 84°F | 76°F | 0" | 0" |
| 1994 | 82°F | 76°F | 0" | 0" |
| 1993 | 79°F | 70°F | 0" | 0" |
| 1992 | 80°F | 76°F | 0" | 0" |
| 1991 | 86°F | 69°F | 0.03" | 0" |
| 1990 | 77°F | 70°F | 0" | 0" |
| 1989 | 84°F | 69°F | 0" | 0" |
| 1988 | 88°F | 67°F | 0" | 0" |
| 1987 | 79°F | 66°F | 0" | 0" |
| 1986 | 80°F | 71°F | 0" | 0" |
| 1985 | 75°F | 71°F | 1.68" | 0" |
| 1984 | 80°F | 73°F | 0" | 0" |
| 1983 | 78°F | 65°F | 0" | 0" |
| 1982 | 82°F | 77°F | 0" | 0" |
| 1981 | 84°F | 72°F | 0" | 0" |
| 1980 | 82°F | 64°F | 0" | 0" |
| 1979 | 77°F | 73°F | 0" | 0" |
| 1978 | 78°F | 65°F | 0" | 0" |
| 1977 | 77°F | 74°F | 0" | 0" |
| 1976 | 79°F | 73°F | 0.08" | 0" |
| 1975 | 82°F | 75°F | 1.02" | 0" |
| 1974 | 77°F | 74°F | 0" | 0" |
| 1973 | 78°F | 72°F | 0" | 0" |
| 1972 | 85°F | 72°F | 0" | 0" |
| 1971 | 80°F | 65°F | 0" | 0" |
April 21 at Nearby Parks
Holiday Weather at Biscayne
Official NPS WebsiteVisit nps.gov/bisc for park information, alerts, and reservations
↗