Temperature
Warm by day, warm at night.
79°Ftypical December high
Typical range
Warm days and plenty of sun.

Warm by day, warm at night.
Several rainy days. About 13 wet days this month.
Plenty of sun this month.
Warm days, with humid periods.
In December, afternoons feel about 78° and nights feel near 76°.
Partly cloudy skies this month.
December's typical breeze keeps the air from feeling as stagnant.
December stays around 78°F through the day and night.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 78 | 75 | 2.4 | 12 | 9.5 | 75 | 80 |
| Feb | 78 | 75 | 1.2 | 8 | 10.6 | 75 | 80 |
| Mar | 79 | 76 | 1.0 | 6 | 11.4 | 75 | 80 |
| Apr | 80 | 78 | 1.1 | 6 | 11.8 | 78 | 81 |
| May | 82 | 79 | 2.9 | 10 | 11.9 | 81 | 82 |
| Jun | 83 | 80 | 6.9 | 18 | 11.1 | 83 | 84 |
| Jul | 83 | 81 | 3.4 | 14 | 11.8 | 82 | 84 |
| Aug | 84 | 81 | 4.4 | 16 | 11.4 | 82 | 85 |
| Sep | 84 | 80 | 6.4 | 20 | 10.5 | 82 | 85 |
| Oct | 82 | 79 | 8.2 | 20 | 10.0 | 80 | 84 |
| Nov | 80 | 77 | 4.5 | 13 | 10.2 | 76 | 83 |
| Dec | 79 | 76 | 2.8 | 13 | 10.0 | 76 | 82 |
Similar climates
Want a side-by-side climate view? Compare Cozumel with Grand Turk.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology