St Lucia weather in September 2026

Expect daytime maximum temperatures of 75°F in St Lucia, South Africa in September based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 3.4 inches of rainfall in the month.

  • 75°F maximum daytime temperature in September in St Lucia75
    75°F max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in September in St Lucia9
    9 days with some rainfall
  • 61°F minimum night-time temperature in September in St Lucia61
    61°F min night temperature
  • 12 hours of daylight per day in September in St Lucia12
    12 hours of daylight per day
  • No heat & humidity in September in St Lucia0
    No heat & humidity
  • 3.4 inches monthly rainfall in September in St Lucia3.4
    3.4 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in September in St Lucia8
    8 (Very High) UV index
  • 72°F sea temperature in September in St Lucia72
    72°F sea temperature

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The September weather guide for South Africa (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.

Metric (°C)  |  Imperial (°F)

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More about South Africa

How hot is it in St Lucia in September?

Daytime temperatures usually reach 64°F in St Lucia in September, falling to 48°F at night.

How sunny is it in St Lucia in September?

There are normally 7 hours of bright sunshine each day in 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 St Lucia in September is 59°F.

Does it rain in St Lucia in September?

There are usually 11 days with some rain in St Lucia in September and the average monthly rainfall is 3.8 inches.

St Lucia September sunrise & sunset times

Browse the sunrise and sunset times for St Lucia in September 2026. Select a month to view St Lucia sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 06:05 17:36
Tuesday, 15th September 2026 05:48 17:43
Wednesday, 30th September 2026 05:31 17:51

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