Typical Weather in St Lucia, Caribbean in September
89° F Avg High
74° F Avg Low
10 Rainy Days
☀️ Temperature Summary
September is one of the warmer months of the year for St Lucia, with highs averaging around 89°F. You can expect overnight lows near 74°F most days.
Be ready to seek shade during the day, as mid-day temperatures can be dangerous if you're caught without a way to cool off.
High Temps Throughout the Year
🎒 What to Pack
Pick up a few of these items to keep your trip fun and comfortable.
☔ Rain Summary
In September you can expect close to a 34% chance of rain for any given day. It rains more than usual in September, with total rainfall for the month typically near 6 inches.
Rainfall Throughout the Year
Planning a trip to St Lucia? Try our free trip weather planner