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September Weather in Choiseul, Saint Lucia

Last updated: August 31, 2025

In September, the average temperature in Choiseul, Saint Lucia hovers around 28°C (82°F), with minimums dipping to 25°C (77°F) and maximums reaching 31°C (88°F). Expect a precipitation amount of 136 mm (5.4 in) spread over 19 days, contributing to an average humidity of 80%. Plan accordingly for warm, humid days with occasional showers!

September Temperature in Choiseul

In September in Choiseul, the average temperature is 28°C (82°F), with maximums reaching up to 31°C (88°F) and minimums dipping as low as 25°C (77°F). This warm climate makes Choiseul an ideal destination for travelers seeking pleasant weather.

September Weather in Choiseul: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Choiseul, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Choiseul, September typically has an average temperature of 28°C (82°F), with highs reaching up to 31°C (88°F) and lows dropping to around 25°C (77°F).
JanFebMarAprMayJunJulAugSepOctNovDec787878798181818182818079
Data source: Temperature data for Choiseul generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Choiseul

In Choiseul in September, the precipitation amount is 136 mm (5.4 in) over the course of 19 days.

September Precipitation Trends in Choiseul

The chart displays monthly precipitation patterns in Choiseul, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Choiseul, September typically receives around 136 mm (5.4 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec38313732396811812113714010846
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Choiseul

In Choiseul in September, humidity is 80%. With an average temperature of 28°C (82°F), this humidity feels like a warm, thick blanket enveloping you, making outdoor activities sweaty and demanding frequent breaks in the shade while traveling.

September Average Humidity in Choiseul

This chart illustrates the average monthly humidity levels in Choiseul, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Choiseul is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%80%80%79%80%83%84%81%80%82%83%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Choiseul

In Choiseul in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Choiseul, you can check here.

Maximum UV Index Levels in Choiseul for September

The chart shows the monthly maximum UV Index (UVI) for Choiseul in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Choiseul typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121414141313141412109
Data source: Choiseul September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Choiseul Compares to Other Months

Weather in Choiseul varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Choiseul, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Choiseul, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (78°F)38 mm (1.5 inches)81%very high
February Weather25°C (78°F)31 mm (1.2 inches)80%extreme
March Weather26°C (78°F)37 mm (1.4 inches)80%extreme
April Weather26°C (80°F)32 mm (1.3 inches)79%extreme
May Weather27°C (81°F)39 mm (1.5 inches)80%extreme
June Weather27°C (81°F)68 mm (2.7 inches)83%extreme
July Weather27°C (81°F)118 mm (4.6 inches)84%extreme
August Weather27°C (82°F)121 mm (4.8 inches)81%extreme
September Weather28°C (82°F)136 mm (5.4 inches)80%extreme
October Weather27°C (81°F)140 mm (5.5 inches)82%extreme
November Weather27°C (81°F)108 mm (4.2 inches)83%very high
December Weather26°C (80°F)46 mm (1.8 inches)82%very high

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