September Weather in Cilacap, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Cilacap, Indonesia hovers around 25°C (78°F). Expect comfortable conditions, with minimums of 22°C (72°F) and maximums reaching 27°C (82°F). However, be prepared for some rain, as 121 mm (4.7 in) of precipitation typically falls over 19 days. With an average humidity of 72%, it's a perfect time to experience the unique charm of Cilacap!

September Temperature in Cilacap

In September in Cilacap, the average temperature is 25°C (78°F). The maximum can reach 27°C (82°F), and the minimum can be as low as 22°C (72°F). It's the perfect weather for exploring and enjoying outdoor activities.

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

The chart illustrates September temperature patterns in Cilacap, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cilacap, September typically has an average temperature of 25°C (78°F), with highs reaching up to 27°C (82°F) and lows dropping to around 22°C (72°F).

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

September Precipitation in Cilacap

In Cilacap in September, the total precipitation amount is 121 mm (4.7 in) over the course of 19 days.

September Precipitation Trends in Cilacap

The chart displays monthly precipitation patterns in Cilacap, 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 Cilacap, September typically receives around 121 mm (4.7 inches) of precipitation spread over approximately 19 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 Cilacap

In Cilacap in September humidity is 72%. With an average temperature of 25°C (78°F), this humidity feels like a warm blanket wrapping around you, making it essential to stay hydrated and take breaks in the shade while exploring.

September Average Humidity in Cilacap

This chart illustrates the average monthly humidity levels in Cilacap, 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 Cilacap is approximately 72%, 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 Cilacap

In Cilacap 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 Cilacap, you can check here.

Maximum UV Index Levels in Cilacap for September

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

Data source: Cilacap 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 Cilacap Compares to Other Months

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

This table compares monthly weather conditions in Cilacap, 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)	281 mm (11.1 inches)	84%	extreme
February Weather	27°C (81°F)	211 mm (8.3 inches)	87%	extreme
March Weather	27°C (81°F)	351 mm (13.8 inches)	85%	extreme
April Weather	27°C (81°F)	189 mm (7.5 inches)	82%	extreme
May Weather	27°C (81°F)	166 mm (6.5 inches)	81%	extreme
June Weather	26°C (80°F)	161 mm (6.3 inches)	81%	very high
July Weather	26°C (78°F)	69 mm (2.7 inches)	79%	extreme
August Weather	25°C (77°F)	64 mm (2.5 inches)	76%	extreme
September Weather	25°C (78°F)	121 mm (4.7 inches)	72%	extreme
October Weather	26°C (79°F)	206 mm (8.1 inches)	74%	extreme
November Weather	27°C (80°F)	433 mm (17.0 inches)	78%	extreme
December Weather	27°C (81°F)	374 mm (14.7 inches)	78%	extreme