Temperature in Saint Lucia in September

Daytime highs, nighttime lows and the warmest cities across Saint Lucia this September.

Saint Lucia, typically experiences very warm weather in September, with maximum daytime temperatures around 31°C (88°F) and nighttime temperatures around 26°C (79°F) in Gros Islet.

What is the temperature of the different cities in Saint Lucia in September?

To get a sense of September's typical temperatures in the key spots of Saint Lucia, explore the map below. Click on a point for an in-depth look.

Select a Month

Check the conditions for any month of the year.

For a detailed overview over the year and the best time to visit Saint Lucia, check out our Saint Lucia's climate page.

See also: the Saint Lucia weather by month.

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
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in September: blue is cold, red is hot.

Saint Lucia temperatures in September: frequently asked questions

How hot does it get in Saint Lucia in September?

Daytime temperatures in Gros Islet typically peak at 31°C (88°F) in September, putting it in the very high range.

How cold does it get at night in Saint Lucia in September?

After dark, Gros Islet cools to about 26°C (79°F) on an average September night.

How much sun does Saint Lucia get in September?

Gros Islet usually sees around 238 hours of sunlight, indicating many sunny days.

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.