September Weather in Ofu, American Samoa

Last updated: August 22, 2025

In Ofu, American Samoa, the average temperature in September reaches a pleasant 27°C (80°F). Visitors can expect a minimum temperature of 24°C (76°F) and a maximum of 28°C (83°F). With 106 mm (4.2 in) of precipitation spread over 20 days, the atmosphere tends to be quite humid, with an average humidity of 84%. Prepare for a warm and tropical environment!

September Temperature in Ofu

In September in Ofu, the average temperature is 27°C (80°F), with maximums reaching 28°C (83°F) and minimums dipping to 24°C (76°F). This mild climate makes it an ideal destination for travelers seeking warm and pleasant weather.

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

The chart illustrates September temperature patterns in Ofu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ofu, 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 24°C (76°F).

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

September Precipitation in Ofu

In Ofu in September, the total precipitation amount is 106 mm (4.2 in) spread over 20 days.

September Precipitation Trends in Ofu

The chart displays monthly precipitation patterns in Ofu, 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 Ofu, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 20 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 Ofu

In Ofu 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 Ofu

This chart illustrates the average monthly humidity levels in Ofu, 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 Ofu 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 Ofu

In Ofu 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 Ofu, you can check here.

Maximum UV Index Levels in Ofu for September

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

Data source: Ofu 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 Ofu Compares to Other Months

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

This table compares monthly weather conditions in Ofu, 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)	279 mm (11.0 inches)	79%	extreme
February Weather	27°C (81°F)	476 mm (18.7 inches)	80%	extreme
March Weather	27°C (82°F)	190 mm (7.5 inches)	79%	extreme
April Weather	27°C (82°F)	241 mm (9.5 inches)	79%	extreme
May Weather	27°C (81°F)	205 mm (8.1 inches)	80%	extreme
June Weather	27°C (81°F)	144 mm (5.7 inches)	80%	very high
July Weather	27°C (80°F)	133 mm (5.2 inches)	81%	very high
August Weather	27°C (80°F)	114 mm (4.5 inches)	83%	extreme
September Weather	27°C (80°F)	106 mm (4.2 inches)	84%	extreme
October Weather	27°C (80°F)	195 mm (7.7 inches)	84%	extreme
November Weather	27°C (81°F)	260 mm (10.2 inches)	82%	extreme
December Weather	27°C (81°F)	365 mm (14.4 inches)	81%	extreme