Normally the average weather in Syros all through the month of September is 22 with a normal high in the month being 27 and average daily low being 21 degrees. With the details being further below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 22 |
| High Temperature | 27 |
| Low Temperature | 21 |
Useful Links: Syros Weather: Average Weather & Yearly Climate