Biscayne National Park weather in December
December in Biscayne National Park: warm, rainy, with clean air — a great time to visit.
#4 of 12 months in Biscayne National Park · #235 of 604 destinations to visit in December · comfort 74/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Biscayne National Park climate normals — December
| Daytime high | 25°C / 77°F | 🌤 warm |
|---|---|---|
| Nighttime low | 20°C / 68°F | |
| Feels like (high) | 26°C / 79°F | |
| Rainfall | 81 mm / 3.2 in | 🌧 rainy |
| Rainy days | 9 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 18°C / 64°F | |
| Sunshine | 8.3 h/day | |
| Daylight | 10.6 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 36 | 🍃 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 December — FAQ
- Is December a good time to visit Biscayne National Park?
- December in Biscayne National Park: warm, rainy, with clean air — a great time to visit. It ranks #4 of 12 months for Biscayne National Park on SeasonMap's comfort score (74/100).
- What is the weather like in Biscayne National Park in December?
- In December, Biscayne National Park averages a daily high of 24.9°C and a low of 19.9°C, with about 80.9 mm of rain over roughly 9.2 rainy days.
- What is the air quality in Biscayne National Park in December?
- Biscayne National Park has a mean US Air Quality Index of about 36 in December.