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September Weather in West Island, Cocos (Keeling) Islands

Last updated: August 23, 2025

In West Island, Cocos (Keeling) Islands during September, the average temperature hovers around 26°C (78°F), with a pleasant range where the minimum can drop to 23°C (74°F) and the maximum peaking at 27°C (81°F). Expect about 24 mm (1.0 in) of precipitation over 7 days, accompanied by an average humidity of 78%.

September Temperature in West Island

In September in West Island, the average temperature is 26°C (78°F), with maximums reaching up to 27°C (81°F) and minimums dipping as low as 23°C (74°F). This mild and pleasant weather makes it an ideal time to explore the area and enjoy outdoor activities.

September Weather in West Island: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in West Island, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In West Island, September typically has an average temperature of 26°C (78°F), with highs reaching up to 27°C (81°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec808181818180797878787979
Data source: Temperature data for West Island 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 West Island

In West Island in September, the total precipitation amount is 24 mm (1.0 in) over a period of 7 days.

September Precipitation Trends in West Island

The chart displays monthly precipitation patterns in West Island, 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 West Island, September typically receives around 24 mm (1.0 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec17916124818613525616970244611887
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in West Island

In West Island in September humidity is 78%. With an average temperature of 26°C (78°F), this humidity feels like a warm embrace, making travel a bit more challenging as the air is thick and can leave you feeling sticky and sluggish. Be sure to stay hydrated and take breaks to enjoy the local sights without overheating.

September Average Humidity in West Island

This chart illustrates the average monthly humidity levels in West Island, 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 West Island is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%80%79%81%83%82%81%78%78%80%79%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in West Island

In West Island 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 West Island, you can check here.

Maximum UV Index Levels in West Island for September

The chart shows the monthly maximum UV Index (UVI) for West Island 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 West Island typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151615141110111314151615
Data source: West Island 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 West Island Compares to Other Months

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

This table compares monthly weather conditions in West Island, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)179 mm (7.1 inches)80%extreme
February Weather27°C (81°F)161 mm (6.3 inches)80%extreme
March Weather27°C (81°F)248 mm (9.8 inches)79%extreme
April Weather27°C (81°F)186 mm (7.3 inches)81%extreme
May Weather27°C (81°F)135 mm (5.3 inches)83%extreme
June Weather27°C (80°F)256 mm (10.1 inches)82%very high
July Weather26°C (79°F)169 mm (6.7 inches)81%extreme
August Weather26°C (78°F)70 mm (2.8 inches)78%extreme
September Weather26°C (78°F)24 mm (1.0 inches)78%extreme
October Weather25°C (78°F)46 mm (1.8 inches)80%extreme
November Weather26°C (79°F)118 mm (4.6 inches)79%extreme
December Weather26°C (79°F)87 mm (3.4 inches)80%extreme

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