Castries weather in September 2021

Get the latest coronavirus (Covid-19) updates for St Lucia with current travel advice and statistics on new cases per 100,000 and vaccine.

  • 30°C maximum daytime temperature in September in Castries30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 25 days with some rainfall in September in Castries25
    25 days with some rainfall
  • 24°C minimum night-time temperature in September in Castries24
    24°C min night temperature
  • 12 hours of daylight per day in September in Castries12
    12 hours of daylight per day
  • Very high heat & humidity in September in CastriesVH
    Very High heat & humidity
  • 224 mm monthly rainfall in September in Castries224
    224 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Castries11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Castries29
    29°C sea temperature
  • Save £200 per booking on Marella Cruises in 2021
  • Book cruises to Europe, Mediterranean & Caribbean
  • Travel before 31st December 2021 (inclusive)
Show discount codeShow discount code ******021

Expires at 23:59 on Saturday 31st Jul 2021 · View all Marella Cruises offers

Marella CruisesCruise deal finder

Recommended for St Lucia

  • Top deals & discounts
  • Castries weather overview
  • Castries climate averages by month
  • More destinations
  • Best time to go to Castries
  • Castries 5-day weather forecast

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

The September weather guide for Castries, St Lucia 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.

How hot is it in Castries in September?

Daytime temperatures usually reach 30°C in Castries in September with very high heat and humidity, falling to 24°C at night.

How sunny is it in Castries in September?

There are normally 8 hours of bright sunshine each day in Castries in September - that's 62% of daylight hours.

How warm is the sea around Castries in September?

The average sea temperature around Castries in September is 29°C.

Does it rain in Castries in September?

There are usually 25 days with some rain in Castries in September and the average monthly rainfall is 224mm.

What is the chance of a hurricane in Castries in September?

On average 1.1 days in September in Castries are likely to be affected by the passage of one or more tropical storms.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Castries sunrise & sunset times for September 2021

Browse the sunrise and sunset times for Castries in September 2021. Select a month to view Castries sunrise & sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st September 2021 05:52 18:15
Wednesday, 15th September 2021 05:53 18:05
Thursday, 30th September 2021 05:53 17:54
  • Save £200 per booking on Marella Cruises in 2021
  • Book cruises to Europe, Mediterranean & Caribbean
  • Travel before 31st December 2021 (inclusive)
Show discount codeShow discount code ******021

Expires at 23:59 on Saturday 31st Jul 2021 · View all Marella Cruises offers

Marella CruisesCruise deal finder

Related posts

Popular travel offers

Top ^

*affiliate links: find out how we are funded and why this helps us remain free to use.