Saint Lucia in september: average Weather, Temperature and Climate, Where to go?
Weather in Saint Lucia in september 2025
Here, check out the weather forecast for september for most popular cities in Saint Lucia. These forecasts are statistics for september from weather reports for over 10 years. The percentage indicates the probability of having the weather mentioned.
Average weather in september in Castries
good weather UV index: 7
Weather at 6am
85°F
Partly Cloudy
36% of time
33%
13%
9%
Weather at 12pm
88°F
Moderate rain at times
39% of time
26%
21%
13%
Weather at 6pm
85°F
Moderate rain at times
40% of time
25%
18%
12%
Weather at 3am
83°F
47%
26%
12%
10%
Where to go in Saint Lucia in september?
Where to go in Saint Lucia in september: destination map
perfect weather
good
tolerable
bad
very bad
Where should you go in Saint Lucia in september when it comes to the weather?
Remember:
The climate in Saint Lucia in september is good across the board.
September is not the best month to travel to in Saint Lucia. The weather everywhere is just ok: in Dennery, Gros Islet, Anse-La-Raye, Vieux Fort, Soufrière, Choiseul, Laborie, Micoud and Castries. The sun is not there all the time and you might make you wet by rain regularly. Nonetheless, if you don't plan a beach and sun holiday but rather city tours or a trek, this climate may suit. In addition, there are certainly fewer tourists at this time of year.
Climate in Saint Lucia in september
Climate in Castries in september
In september, the mean temperature in Castries is 86°F (maximum temperature is 88°F and minimum temperature is 85°F). The climate is very warm in this location in september. With 6.2in over 9 days, rain may occur throughout your journey. But this is reasonably and you will not be too bothered by it.
With proper weather, september is okay (but not good month) for traveling in Castries.
| September | |||
| Average temperature | 86°F | ||
| Highest temperature | 88°F | ||
| Lowest temperature | 85°F | ||
| Sea temperature | 85°F | ||
| Rainfall | 6.2in | ||
| Number of days with rainfall | 9 day(s) (28%) | ||
| Humidity | 75% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 42% | ||
| Length of day | 12:12 | ||
| Our opinion at whereandwhen.net | good |
Climate in Soufrière in september
In the month of september, maximum temperature is 86°F and minimum temperature is 85°F (for an average temperature of 85°F). The climate is very warm in this city in this month. With 6in over 9 days, rain may occur for your vacations. But this is reasonably and it is only of temporary showers.
With a correct weather, the month of september is okay (but not the best month) for traveling there in Saint Lucia.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 86°F | ||
| Lowest temperature | 85°F | ||
| Sea temperature | 86°F | ||
| Rainfall | 6in | ||
| Number of days with rainfall | 9 day(s) (30%) | ||
| Humidity | 76% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 38% | ||
| Length of day | 12:12 | ||
| Our opinion at whereandwhen.net | good |
Climate in Anse-La-Raye in september
In the month of september, the mean temperature in Anse-La-Raye is 86°F (maximum temperature is 88°F and minimum temperature is 85°F). The climate is burning in that area in this month. With 6.2in over 9 days, you will experience some showers for your journey. But this is pretty moderate and it will not be continuous.
With a correct climate, september is okay (but not good time) for traveling in this locality in Saint Lucia.
| September | |||
| Average temperature | 86°F | ||
| Highest temperature | 88°F | ||
| Lowest temperature | 85°F | ||
| Sea temperature | 86°F | ||
| Rainfall | 6.2in | ||
| Number of days with rainfall | 9 day(s) (28%) | ||
| Humidity | 75% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 42% | ||
| Length of day | 12:12 | ||
| Our opinion at whereandwhen.net | good |
Climate in Choiseul in september
In the month of september, maximum temperature is 86°F and minimum temperature is 85°F (for an average temperature of 85°F). The climate is very hot in this city in this month. With 6in over 9 days, rainfall can happen throughout your vacations. But this is moderate and it is only of temporary showers.
With a correct climate, the month of september is okay (but not good time) for traveling in this city in Saint Lucia.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 86°F | ||
| Lowest temperature | 85°F | ||
| Sea temperature | 86°F | ||
| Rainfall | 6in | ||
| Number of days with rainfall | 9 day(s) (30%) | ||
| Humidity | 76% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 38% | ||
| Length of day | 12:12 | ||
| Our opinion at whereandwhen.net | good |
Climate in Dennery in september
In the month of september, the mean temperature in Dennery is 86°F (maximum temperature is 88°F and minimum temperature is 85°F). The climate is very warm in that locality in this month. With 6.2in over 9 days, rain may occur for your vacations. But this is pretty reasonably and you will not be too bothered by it.
With a correct weather, the month of september is okay (but not the best month) for traveling in this locality in Saint Lucia.
| September | |||
| Average temperature | 86°F | ||
| Highest temperature | 88°F | ||
| Lowest temperature | 85°F | ||
| Sea temperature | 86°F | ||
| Rainfall | 6.2in | ||
| Number of days with rainfall | 9 day(s) (28%) | ||
| Humidity | 75% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 42% | ||
| Length of day | 12:12 | ||
| Our opinion at whereandwhen.net | good |
All cities in Saint Lucia in september
| Castries in september | good weather |
| Soufrière in september | good weather |
| Anse-La-Raye in september | good weather |
| Choiseul in september | good weather |
| Dennery in september | good weather |
| Gros Islet in september | good weather |
| Laborie in september | good weather |
| Micoud in september | good weather |
| Vieux Fort in september | good weather |
| Praslin Bay in september | good weather |
Weather data for Saint Lucia in september:
Weather data for Saint Lucia in september is derived from an average of the weather forecast since 2009 in Saint Lucia. There is a margin of error and these forecasts are to be considered as general information only. The weather in Saint Lucia can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Saint Lucia.