September Weather in Boroko, Indonesia

Last updated: August 23, 2025

In Boroko, Indonesia, the average temperature in September is a warm 27°C (81°F), with a minimum of 25°C (77°F) and a maximum reaching up to 30°C (86°F). Visitors should prepare for 157 mm (6.2 in) of precipitation over approximately 17 days, contributing to an average humidity level of 80%. Enjoy the tropical climate!

September Temperature in Boroko

In September in Boroko, the average temperature is 27°C (81°F). The maximum can reach 30°C (86°F) and the minimum can be as low as 25°C (77°F). It's a perfect time to visit Boroko for warm and pleasant weather!

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

The chart illustrates September temperature patterns in Boroko, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boroko, September typically has an average temperature of 27°C (81°F), with highs reaching up to 30°C (86°F) and lows dropping to around 25°C (77°F).

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

September Precipitation in Boroko

In Boroko in September, the precipitation amount is 157 mm (6.2 in) spread over 17 days.

September Precipitation Trends in Boroko

The chart displays monthly precipitation patterns in Boroko, 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 Boroko, September typically receives around 157 mm (6.2 inches) of precipitation spread over approximately 17 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 Boroko

In Boroko in September humidity is 80%. With an average temperature of 27°C (81°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making travel tiring as sweat beads form quickly and the air feels thick and heavy.

September Average Humidity in Boroko

This chart illustrates the average monthly humidity levels in Boroko, 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 Boroko is approximately 80%, 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 Boroko

In Boroko 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 Boroko, you can check here.

Maximum UV Index Levels in Boroko for September

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

Data source: Boroko 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 Boroko Compares to Other Months

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

This table compares monthly weather conditions in Boroko, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	199 mm (7.8 inches)	80%	extreme
February Weather	26°C (79°F)	183 mm (7.2 inches)	84%	extreme
March Weather	26°C (80°F)	177 mm (7.0 inches)	84%	extreme
April Weather	27°C (81°F)	127 mm (5.0 inches)	82%	extreme
May Weather	27°C (81°F)	212 mm (8.3 inches)	76%	extreme
June Weather	27°C (81°F)	273 mm (10.8 inches)	78%	extreme
July Weather	27°C (81°F)	220 mm (8.6 inches)	80%	extreme
August Weather	27°C (81°F)	143 mm (5.6 inches)	82%	extreme
September Weather	27°C (81°F)	157 mm (6.2 inches)	80%	extreme
October Weather	27°C (81°F)	116 mm (4.5 inches)	78%	extreme
November Weather	27°C (81°F)	155 mm (6.1 inches)	77%	extreme
December Weather	27°C (80°F)	190 mm (7.5 inches)	78%	extreme