Biscayne National Park weather in May
May in Biscayne National Park: hot, rainy, with clean air — a great time to visit.
#6 of 12 months in Biscayne National Park · #461 of 604 destinations to visit in May · comfort 70/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Biscayne National Park climate normals — May
| Daytime high | 29°C / 84°F | 🥵 hot |
|---|---|---|
| Nighttime low | 24°C / 75°F | |
| Feels like (high) | 32°C / 90°F | |
| Rainfall | 121 mm / 4.8 in | 🌧 rainy |
| Rainy days | 16 days | |
| Humidity | 75% | 💧 humid |
| Dew point | 21°C / 70°F | |
| Sunshine | 11.6 h/day | |
| Daylight | 13.4 h | |
| Wind | 20 km/h / 13 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Biscayne National Park?
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Biscayne National Park in May — FAQ
- Is May a good time to visit Biscayne National Park?
- May in Biscayne National Park: hot, rainy, with clean air — a great time to visit. It ranks #6 of 12 months for Biscayne National Park on SeasonMap's comfort score (70/100).
- What is the weather like in Biscayne National Park in May?
- In May, Biscayne National Park averages a daily high of 29°C and a low of 23.8°C, with about 121.1 mm of rain over roughly 15.8 rainy days.
- What is the air quality in Biscayne National Park in May?
- Biscayne National Park has a mean US Air Quality Index of about 42 in May.