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St Lucia weather in September 2023
- 3030°C max day temperature
- 2525 days with some rainfall
- 2424°C min night temperature
- 1212 hours of daylight per day
- VHVery High heat & humidity
- 224224 mm of monthly rainfall
- 1111+ (Extreme) UV index
- 2929°C sea temperature
Below are average maximum temperatures at popular destinations in St Lucia in September. Select a destination to see more weather parameters.
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The September weather guide for St Lucia (Castries) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about St Lucia
How hot is it in St Lucia in September?
Daytime temperatures usually reach 30°C in Castries, St Lucia in September with very high heat and humidity, falling to 24°C at night.
How sunny is it in St Lucia in September?
There are normally 8 hours of bright sunshine each day in Castries, St Lucia in September - that's 62% of daylight hours.
How warm is the sea around St Lucia in September?
The average sea temperature around Castries, St Lucia in September is 29°C.
Does it rain in St Lucia in September?
There are usually 25 days with some rain in Castries, St Lucia in September and the average monthly rainfall is 224mm.
What is the chance of a hurricane in St Lucia in September?
On average 1.1 days in September in Castries, St Lucia are likely to be affected by the passage of one or more tropical storms.
St Lucia September sunrise & sunset times
Browse the sunrise and sunset times for St Lucia in September 2023. Select a month to view St Lucia sunrise and sunset times for the next 12 months. The St Lucia sunrise and sunset times shown below are for Castries.
|Date||Sunrise times||Sunset times|
|Friday, 1st September 2023||05:52||18:16|
|Friday, 15th September 2023||05:53||18:05|
|Saturday, 30th September 2023||05:53||17:54|
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