September Weather in Kumai, Indonesia

Last updated: August 23, 2025

In Kumai, Indonesia during September, the average temperature hovers around 27°C (81°F), with a minimum of 22°C (72°F) and a maximum reaching 33°C (92°F). Expect precipitation of approximately 168 mm (6.6 in) spread over 19 days, resulting in a high average humidity of 79%. Stay prepared for a warm, humid month!

September Temperature in Kumai

In September in Kumai, the average temperature is 27°C (81°F). The maximum can reach 33°C (92°F), while the minimum can be as low as 22°C (72°F). This mild and warm climate makes it an ideal destination for outdoor activities and sightseeing.

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

The chart illustrates September temperature patterns in Kumai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kumai, September typically has an average temperature of 27°C (81°F), with highs reaching up to 33°C (92°F) and lows dropping to around 22°C (72°F).

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

September Precipitation in Kumai

In Kumai in September, the total precipitation amounts to 168 mm (6.6 in) over a span of 19 days.

September Precipitation Trends in Kumai

The chart displays monthly precipitation patterns in Kumai, 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 Kumai, September typically receives around 168 mm (6.6 inches) of precipitation spread over approximately 19 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Kumai

In Kumai in September, humidity is 79%. With an average temperature of 27°C (81°F), this humidity feels like a warm and sticky embrace, making travel both challenging and invigorating as the air clings to your skin, urging you to seek shade or a refreshing drink.

September Average Humidity in Kumai

This chart illustrates the average monthly humidity levels in Kumai, 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 Kumai is approximately 79%, 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 Kumai

In Kumai in September, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Kumai.

Maximum UV Index Levels in Kumai for September

The chart shows the monthly maximum UV Index (UVI) for Kumai 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 Kumai typically reaches 15, which falls under the extreme exposure category.

Data source: Kumai 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 Kumai Compares to Other Months

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

This table compares monthly weather conditions in Kumai, 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 (80°F)	236 mm (9.3 inches)	86%	extreme
February Weather	27°C (81°F)	240 mm (9.4 inches)	86%	extreme
March Weather	27°C (81°F)	256 mm (10.1 inches)	86%	extreme
April Weather	27°C (81°F)	284 mm (11.2 inches)	84%	extreme
May Weather	27°C (82°F)	268 mm (10.5 inches)	83%	extreme
June Weather	27°C (81°F)	240 mm (9.4 inches)	85%	extreme
July Weather	27°C (80°F)	163 mm (6.4 inches)	85%	extreme
August Weather	27°C (80°F)	150 mm (5.9 inches)	85%	extreme
September Weather	27°C (81°F)	168 mm (6.6 inches)	79%	extreme
October Weather	27°C (81°F)	315 mm (12.4 inches)	80%	extreme
November Weather	27°C (81°F)	294 mm (11.6 inches)	80%	extreme
December Weather	27°C (80°F)	270 mm (10.6 inches)	83%	extreme