You should expect the average temperature in Cayo Guillermo during October is 25. Highs are around 31 degrees and a low of 22 celsius. The table below includes more detail:
| Month | Degrees Celsius |
|---|---|
| Temperature | 25 |
| High Temperature | 31 |
| Low Temperature | 22 |
| Sunshine Per Day | 8 |
Useful Links: Cayo Guillermo Weather: Average Weather & Yearly Climate