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September Weather in Oranjestad, Bonaire, Sint Eustatius and Saba

Last updated: August 22, 2025

In September, the average temperature in Oranjestad, Bonaire, Sint Eustatius and Saba hovers around 28°C (82°F), with a minimum of 25°C (78°F) and a maximum of 29°C (85°F). Prepare for precipitation of about 148 mm (5.8 in) spread over 20 days, accompanied by a cozy average humidity of 80%.

September Temperature in Oranjestad

In September in Oranjestad, the average temperature is 28°C (82°F), with maximums reaching 29°C (85°F) and minimums dropping to as low as 25°C (78°F). This mild climate makes it an ideal destination for travelers seeking pleasant weather.

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

The chart illustrates September temperature patterns in Oranjestad, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oranjestad, September typically has an average temperature of 28°C (82°F), with highs reaching up to 29°C (85°F) and lows dropping to around 25°C (78°F).
JanFebMarAprMayJunJulAugSepOctNovDec777777787981818282818079
Data source: Temperature data for Oranjestad 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 Oranjestad

In Oranjestad in September, the total precipitation amount is 148 mm (5.8 in) spread over 20 days.

September Precipitation Trends in Oranjestad

The chart displays monthly precipitation patterns in Oranjestad, 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 Oranjestad, September typically receives around 148 mm (5.8 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec32312537504977981481089245
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Oranjestad

In Oranjestad 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 Oranjestad

This chart illustrates the average monthly humidity levels in Oranjestad, 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 Oranjestad is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%77%77%78%79%81%83%82%80%79%79%78%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Oranjestad

In Oranjestad 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 Oranjestad, you can check here.

Maximum UV Index Levels in Oranjestad for September

The chart shows the monthly maximum UV Index (UVI) for Oranjestad 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 Oranjestad typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131313131313141299
Data source: Oranjestad 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 Oranjestad Compares to Other Months

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

This table compares monthly weather conditions in Oranjestad, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)31 mm (1.2 inches)77%very high
February Weather25°C (77°F)31 mm (1.2 inches)77%extreme
March Weather25°C (77°F)25 mm (1.0 inches)77%extreme
April Weather26°C (78°F)37 mm (1.4 inches)78%extreme
May Weather26°C (79°F)50 mm (2.0 inches)79%extreme
June Weather27°C (81°F)49 mm (1.9 inches)81%extreme
July Weather27°C (81°F)77 mm (3.0 inches)83%extreme
August Weather28°C (82°F)98 mm (3.9 inches)82%extreme
September Weather28°C (82°F)148 mm (5.8 inches)80%extreme
October Weather27°C (82°F)108 mm (4.3 inches)79%extreme
November Weather27°C (80°F)92 mm (3.6 inches)79%very high
December Weather26°C (79°F)45 mm (1.8 inches)78%very high

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