Generally the typical temperate in Key West through the whole of September is 28 with a high of 31 with lows of 26. Discover more information below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 28 |
| High Temperature | 31 |
| Low Temperature | 26 |
| Sunshine Per Day | 10 |
Useful Links: Key West Weather: Average Weather & Yearly Climate