Saint Lucia

Saint Lucia Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Saint Lucia in September.

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Gros Islet Soufrière Castries Vieux Fort

Are you planning a trip a to Saint Lucia in September and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in Saint Lucia in September

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

Temperatures

You can expect very warm maximum daytime temperatures of around 31°C (88°F) and nighttime temperatures around 26°C (79°F) 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.

To explore the conditions in Saint Lucia in more detail, check the map below.

Precipitation

In September, precipitation varies across different areas. From high rainfall in Castries with an average of 122 mm (4.8 in) to high rainfall in Mon Repos with 147 mm (5.8 in).

Average sunshine

September brings good sunshine to many areas. Gros Islet sees around 238 hours of sunlight, great for visitors looking for bright days.

Explore Saint Lucia by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Best Places to Visit in Saint Lucia in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Saint Lucia.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Saint Lucia

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

Temperature range in Saint Lucia (September)

Precipitation variation in Saint Lucia (September)

Gros Islet

In September Gros Islet generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 26°C (79°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
30°C (86°F)
31°C (88°F)
30°C (86°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
248 hours
238 hours
214 hours
Monthly rainfall
131 mm (5.2 in)
138 mm (5.4 in)
149 mm (5.9 in)
Monthly rainy days
20 days
24 days
18 days
Weather conditions
tolerable
tolerable
tolerable
Climate in Gros Islet →

Soufrière

In September Soufrière generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 26°C (79°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
31°C (88°F)
31°C (88°F)
30°C (86°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
248 hours
238 hours
214 hours
Monthly rainfall
121 mm (4.8 in)
128 mm (5 in)
137 mm (5.4 in)
Monthly rainy days
20 days
24 days
18 days
Weather conditions
tolerable
tolerable
tolerable
Climate in Soufrière →

Castries

In September Castries generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 26°C (79°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
31°C (88°F)
31°C (88°F)
31°C (88°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
248 hours
238 hours
214 hours
Monthly rainfall
114 mm (4.5 in)
122 mm (4.8 in)
133 mm (5.2 in)
Monthly rainy days
20 days
24 days
18 days
Weather conditions
tolerable
tolerable
tolerable
Climate in Castries →

Cap Estate

In September Cap Estate generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 26°C (79°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
248 hours
238 hours
214 hours
Monthly rainfall
132 mm (5.2 in)
140 mm (5.5 in)
150 mm (5.9 in)
Monthly rainy days
20 days
25 days
18 days
Weather conditions
tolerable
tolerable
tolerable
Climate in Cap Estate →

Vieux Fort

In September Vieux Fort generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 26°C (79°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
248 hours
238 hours
214 hours
Monthly rainfall
138 mm (5.4 in)
143 mm (5.6 in)
151 mm (5.9 in)
Monthly rainy days
20 days
23 days
18 days
Weather conditions
tolerable
tolerable
tolerable
Climate in Vieux Fort →

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

Popular cities in September

Day & night temperatures, rainfall and average weather in Saint Lucia in September.

City Weather Day temp Night temp Rainfall
Gros Islet 31°C (88°F) 26°C (79°F) 138 mm (5.4 in)
Soufrière 31°C (88°F) 26°C (79°F) 128 mm (5 in)
Castries 31°C (88°F) 26°C (79°F) 122 mm (4.8 in)
Vieux Fort 30°C (86°F) 26°C (79°F) 143 mm (5.6 in)
Marigot Bay 31°C (88°F) 26°C (79°F) 124 mm (4.9 in)
Marisule Estate 31°C (88°F) 26°C (79°F) 132 mm (5.2 in)

Saint Lucia weather in September: frequently asked questions

What is the weather like in Saint Lucia in September?

Saint Lucia typically experiences unpleasant weather in September, part of the season. Daytime highs in Gros Islet average around 31°C (88°F), and temperatures drop to about 26°C (79°F) at night.

What is the average temperature in Saint Lucia in September?

Daytime temperatures in Gros Islet peak at roughly 31°C (88°F) in September, dropping to about 26°C (79°F) overnight.

Does Saint Lucia get a lot of rain in September?

Yes, September tends to be a wetter month in Saint Lucia. Average rainfall in Gros Islet sits around 138 mm (5.4 in).

Is September a Good 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 unpleasant weather conditions.

Interested in more climate information?

We have much more information about the climate in Saint Lucia.

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 travel conditions. Find out where to go with our weather planner.