Cozumel weather in December
December in Cozumel: warm, rainy, with clean air — an excellent time to visit.
#9 of 12 months in Cozumel · #255 of 897 destinations to visit in December · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Cozumel in December
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Cozumel climate normals — December
| Daytime high | 27°C / 80°F | 🌤 warm |
|---|---|---|
| Nighttime low | 25°C / 76°F | |
| Rainfall | 87 mm / 3.4 in | 🌧 rainy |
| Rainy days | 13 days | |
| Humidity | 73% | 💧 humid |
| Dew point | 20°C / 69°F | |
| Sunshine | 9.3 h/day | |
| Daylight | 10.9 h | |
| Wind | 26 km/h / 16 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Cozumel in December — FAQ
- Is December a good time to visit Cozumel?
- December in Cozumel: warm, rainy, with clean air — an excellent time to visit. It ranks #9 of 12 months for Cozumel on SeasonMap's comfort score (81/100).
- What is the weather like in Cozumel in December?
- In December, Cozumel averages a daily high of 26.5°C and a low of 24.7°C, with about 87.2 mm of rain over roughly 12.8 rainy days.
- What is the air quality in Cozumel in December?
- Cozumel has a mean US Air Quality Index of about 42 in December.