September Weather in Isimu, Indonesia

Last updated: August 23, 2025

In Isimu, Indonesia, the average temperature in September hovers around 27°C (81°F), making it a delightful time to enjoy the outdoors. The temperature can dip to a comfortable 20°C (67°F) at its lowest, while it can soar up to a sizzling 35°C (95°F). Be prepared for some rain, as precipitation averages 168 mm (6.6 in) over approximately 16 days, contributing to an average humidity level of 80%.

September Temperature in Isimu

In September in Isimu, the average temperature is 27°C (81°F). Maximum temperatures can reach up to 35°C (95°F), while minimums can drop to as low as 20°C (67°F). This makes it an ideal time for travelers seeking warm weather and pleasant conditions.

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

The chart illustrates September temperature patterns in Isimu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Isimu, September typically has an average temperature of 27°C (81°F), with highs reaching up to 35°C (95°F) and lows dropping to around 20°C (67°F).

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

September Precipitation in Isimu

In Isimu in September, the precipitation amount is 168 mm (6.6 in) spread over 16 days.

September Precipitation Trends in Isimu

The chart displays monthly precipitation patterns in Isimu, 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 Isimu, September typically receives around 168 mm (6.6 inches) of precipitation spread over approximately 16 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 Isimu

In Isimu 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 Isimu

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

In Isimu 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 Isimu, you can check here.

Maximum UV Index Levels in Isimu for September

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

Data source: Isimu 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 Isimu Compares to Other Months

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

This table compares monthly weather conditions in Isimu, 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 (80°F)	254 mm (10.0 inches)	80%	extreme
February Weather	26°C (80°F)	207 mm (8.2 inches)	84%	extreme
March Weather	27°C (80°F)	281 mm (11.1 inches)	84%	extreme
April Weather	27°C (80°F)	365 mm (14.4 inches)	82%	extreme
May Weather	27°C (81°F)	293 mm (11.6 inches)	76%	extreme
June Weather	26°C (80°F)	250 mm (9.8 inches)	78%	extreme
July Weather	26°C (80°F)	202 mm (7.9 inches)	80%	extreme
August Weather	27°C (81°F)	134 mm (5.3 inches)	82%	extreme
September Weather	27°C (81°F)	168 mm (6.6 inches)	80%	extreme
October Weather	27°C (81°F)	189 mm (7.4 inches)	78%	extreme
November Weather	27°C (81°F)	312 mm (12.3 inches)	77%	extreme
December Weather	27°C (81°F)	277 mm (10.9 inches)	78%	extreme