September Weather in Ailuk, Marshall Islands

Last updated: August 23, 2025

In September, the average temperature in Ailuk, Marshall Islands is a warm 27°C (82°F), with a comfortable minimum of 25°C (78°F) and a pleasant maximum of 29°C (85°F). However, expect a fair amount of rain, with 253 mm (9.9 in) of precipitation spread across 26 days. The average humidity hovers around a steamy 77%, making for a tropical experience.

September Temperature in Ailuk

In September, in Ailuk, the average temperature is 27°C (82°F), with maximums reaching 29°C (85°F) and minimums dropping to as low as 25°C (78°F). This warm climate makes Ailuk a perfect destination for travelers seeking pleasant weather and outdoor activities.

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

The chart illustrates September temperature patterns in Ailuk, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ailuk, September typically has an average temperature of 27°C (82°F), with highs reaching up to 29°C (85°F) and lows dropping to around 25°C (78°F).

Data source: Temperature data for Ailuk generated using information from the Copernicus Climate Change Service.

September Precipitation in Ailuk

In Ailuk, in September, the precipitation amount is 253 mm (9.9 in) spread over 26 days.

September Precipitation Trends in Ailuk

The chart displays monthly precipitation patterns in Ailuk, 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 Ailuk, September typically receives around 253 mm (9.9 inches) of precipitation spread over approximately 26 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Ailuk

In Ailuk in September, humidity is 77%. With an average temperature of 27°C (82°F), this humidity feels like a warm blanket wrapping around you, making travel feel heavy and slightly stifling, requiring frequent breaks and hydration to enjoy the sights comfortably.

September Average Humidity in Ailuk

This chart illustrates the average monthly humidity levels in Ailuk, 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 Ailuk is approximately 77%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ailuk

In Ailuk 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 Ailuk, you can check here.

Maximum UV Index Levels in Ailuk for September

The chart shows the monthly maximum UV Index (UVI) for Ailuk 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 Ailuk typically reaches 14, which falls under the extreme exposure category.

Data source: Ailuk 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 Ailuk Compares to Other Months

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

This table compares monthly weather conditions in Ailuk, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	51 mm (2.0 inches)	82%	extreme
February Weather	27°C (80°F)	52 mm (2.0 inches)	81%	extreme
March Weather	27°C (80°F)	78 mm (3.1 inches)	82%	extreme
April Weather	27°C (81°F)	111 mm (4.4 inches)	83%	extreme
May Weather	27°C (81°F)	158 mm (6.2 inches)	81%	extreme
June Weather	27°C (81°F)	153 mm (6.0 inches)	80%	extreme
July Weather	27°C (82°F)	158 mm (6.2 inches)	78%	extreme
August Weather	27°C (82°F)	215 mm (8.5 inches)	76%	extreme
September Weather	27°C (82°F)	253 mm (9.9 inches)	77%	extreme
October Weather	27°C (81°F)	270 mm (10.6 inches)	78%	extreme
November Weather	27°C (82°F)	249 mm (9.8 inches)	80%	extreme
December Weather	27°C (81°F)	73 mm (2.9 inches)	82%	very high