Average temperatures Key West during the month of December is 21. High average temperature is 25 degrees with a low of 20. Our table below has the full details:
| Month | Degrees Celsius |
|---|---|
| Temperature | 21 |
| High Temperature | 25 |
| Low Temperature | 20 |
| Sunshine Per Day | 9 |
Useful Links: Key West Weather: Average Weather & Yearly Climate