Climate almanac
Key Biscayne
Florida, United States · 25.69°, -80.16°
What is the climate like in Key Biscayne?
The best time to visit Key Biscayne is typically November – May, with trip comfort peaking in February (7.8/10). Key Biscayne is warmest in August, when daily highs average 87°F (30°C), and coolest in January, when lows fall to about 65°F (18°C). The wettest month is typically September and the driest is February; the year sees roughly 54 in (1383 mm) of precipitation.
- Best time to visitNovember – May — comfort peaks in February (7.8/10)
- Warmest monthAugust — average high 87°F (30°C)
- Coolest monthJanuary — average low 65°F (18°C)
- Wettest monthSeptember (8.6 in (219 mm))
- Driest monthFebruary (1.7 in (43 mm))
- Annual precipitation54 in (1383 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromMiami Beach, 13 km away (1927-2022)