Normally the average weather in St Lucia during the month of September is 26. You can expect a high of 31 and typical average low being around 25 degrees. With the details being further below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 26 |
| High Temperature | 31 |
| Low Temperature | 25 |
| Sunshine Per Day | 10 |
Useful Links: St Lucia Weather: Average Weather & Yearly Climate