September Weather in Alao, American Samoa

Last updated: August 22, 2025

In September, the average temperature in Alao, American Samoa rests comfortably at 27°C (80°F), with a minimum of 25°C (76°F) and a maximum reaching 28°C (83°F). Expect 144 mm (5.7 in) of precipitation spread over 21 days, contributing to a high average humidity of 84%. Perfect for those who enjoy a tropical ambiance and lush surroundings!

September Temperature in Alao

In September in Alao, the average temperature is 27°C (80°F). Maximum temperatures can reach 28°C (83°F), while minimums can drop to as low as 25°C (76°F). This mild climate makes Alao an ideal destination for travelers seeking pleasant weather.

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

The chart illustrates September temperature patterns in Alao, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alao, September typically has an average temperature of 27°C (80°F), with highs reaching up to 28°C (83°F) and lows dropping to around 25°C (76°F).

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

September Precipitation in Alao

In Alao in September, the precipitation amount is 144 mm (5.7 in) over a span of 21 days.

September Precipitation Trends in Alao

The chart displays monthly precipitation patterns in Alao, 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 Alao, September typically receives around 144 mm (5.7 inches) of precipitation spread over approximately 21 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 Alao

In Alao in September, humidity is 84%. With an average temperature of 27°C (80°F), this humidity feels like a thick, warm blanket enveloping you, making travel feel sluggish and exhausting.

September Average Humidity in Alao

This chart illustrates the average monthly humidity levels in Alao, 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 Alao is approximately 84%, 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 Alao

In Alao 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 Alao, you can check here.

Maximum UV Index Levels in Alao for September

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

Data source: Alao 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 Alao Compares to Other Months

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

This table compares monthly weather conditions in Alao, 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)	297 mm (11.7 inches)	79%	extreme
February Weather	27°C (81°F)	481 mm (18.9 inches)	80%	extreme
March Weather	27°C (82°F)	190 mm (7.5 inches)	79%	extreme
April Weather	27°C (82°F)	234 mm (9.2 inches)	79%	extreme
May Weather	27°C (81°F)	210 mm (8.3 inches)	80%	extreme
June Weather	27°C (81°F)	174 mm (6.9 inches)	80%	very high
July Weather	27°C (80°F)	156 mm (6.2 inches)	81%	very high
August Weather	27°C (80°F)	128 mm (5.1 inches)	83%	extreme
September Weather	27°C (80°F)	144 mm (5.7 inches)	84%	extreme
October Weather	27°C (80°F)	214 mm (8.4 inches)	85%	extreme
November Weather	27°C (81°F)	269 mm (10.6 inches)	82%	extreme
December Weather	27°C (81°F)	350 mm (13.8 inches)	82%	extreme