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Saint Lucia weather in September

Planning a journey to Saint Lucia this September and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What is the weather like in Saint Lucia in September?

September in Saint Lucia generally has very warm temperatures, with high precipitation.

You can expect very warm maximum daytime temperatures of around 31°C and nighttime temperatures around 26°C in Gros Islet. The temperatures cited for both day and night represent usual averages, but it's possible some days could be hotter. It's advisable to dress accordingly to handle the heat.

In September, precipitation varies across different areas. From high rainfall in Castries with an average of 122 mm to high rainfall in Micoud with 146 mm. The city Gros Islet usually sees around 238 hours of sunlight, indicating many sunny days.

For a closer look at September's conditions in Saint Lucia, see the map below. For a more detailed look at Saint Lucia's yearly weather, check out our Saint Lucia climate page.

Where to go in Saint Lucia in September

Find the average weather conditions in September for the most popular destinations in Saint Lucia on the map below. Click on a destination dot for more detailed information.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations in Saint Lucia

What is the weather like in September for the 5 most popular destinations in Saint Lucia?

Average weather in Gros Islet

In September Gros Islet generally has very high temperatures with maximum daytime temperatures around 31°C, minimum nighttime temperatures around 26°C and high monthly rainfall. So on average the conditions are tolerable that month.

Gros Islet
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
30°C 
26°C 
248 hours 
131 mm 
20 days 
31°C 
26°C 
238 hours 
138 mm 
24 days 
October   >> October
>>  
30°C 
26°C 
214 hours 
149 mm 
18 days 
Climate in Gros Islet

Average weather in Soufrière

In September Soufrière generally has very high temperatures with maximum daytime temperatures around 31°C, minimum nighttime temperatures around 26°C and high monthly rainfall. So on average the conditions are tolerable that month.

Soufrière
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
31°C 
26°C 
248 hours 
121 mm 
20 days 
31°C 
26°C 
238 hours 
128 mm 
24 days 
October   >> October
>>  
30°C 
26°C 
214 hours 
137 mm 
18 days 
Climate in Soufrière

Average weather in Castries

In September Castries generally has very high temperatures with maximum daytime temperatures around 31°C, minimum nighttime temperatures around 26°C and high monthly rainfall. So on average the conditions are tolerable that month.

Castries
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
31°C 
26°C 
248 hours 
114 mm 
20 days 
31°C 
26°C 
238 hours 
122 mm 
24 days 
October   >> October
>>  
31°C 
26°C 
214 hours 
133 mm 
18 days 
Climate in Castries

Average weather in Cap Estate

In September Cap Estate generally has very high temperatures with maximum daytime temperatures around 30°C, minimum nighttime temperatures around 26°C and high monthly rainfall. So on average the conditions are tolerable that month.

Cap Estate
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
30°C 
26°C 
248 hours 
132 mm 
20 days 
30°C 
26°C 
238 hours 
140 mm 
25 days 
October   >> October
>>  
30°C 
26°C 
214 hours 
150 mm 
18 days 
Climate in Cap Estate

Average weather in Vieux Fort

In September Vieux Fort generally has very high temperatures with maximum daytime temperatures around 30°C, minimum nighttime temperatures around 26°C and high monthly rainfall. So on average the conditions are tolerable that month.

Vieux Fort
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
30°C 
26°C 
248 hours 
138 mm 
20 days 
30°C 
26°C 
238 hours 
143 mm 
23 days 
October   >> October
>>  
30°C 
26°C 
214 hours 
151 mm 
18 days 
Climate in Vieux Fort

Is your destination not in the list? Have a look at other destinations in Saint Lucia.

Is September the best time to visit Saint Lucia?

In our view, September might not be the best time to travel to Saint Lucia with often tolerable weather in Gros Islet.

Generally speaking, January, February, March, April and December provide perfect weather in Gros Islet. In contrast, July, August, September, October and November tend to have tolerable weather conditions.

Interested in more climate information?

We have much more information about the climate in Saint Lucia. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for every country in the world. Are you going to Saint Lucia? Get detailed historical weather averages for many cities in Saint Lucia.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.