Usually average temperatures are Cozumel through the month of December is 22 with a high of 28 degrees celsius with a low of 20 celsius. We have put some more information here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 22 |
| High Temperature | 28 |
| Low Temperature | 20 |
| Sunshine Per Day | 9 |
Useful Links: Cozumel Weather: Average Weather & Yearly Climate