September Weather in Sibolga, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Sibolga, Indonesia hovers around 25°C (78°F), providing a comfortable climate for outdoor activities. Expect minimum temperatures of 22°C (72°F) and maximum highs reaching 30°C (86°F). However, be prepared for considerable precipitation, with around 362 mm (14.3 in) expected over 25 days, contributing to an average humidity level of 87%. Plan accordingly to make the most of this lush and vibrant month!

September Temperature in Sibolga

In September in Sibolga, the average temperature is 25°C (78°F). Maximums can reach 30°C (86°F) and minimums can be as low as 22°C (72°F). This pleasant weather makes Sibolga an ideal destination for travelers looking to enjoy comfortable conditions.

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

The chart illustrates September temperature patterns in Sibolga, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sibolga, September typically has an average temperature of 25°C (78°F), with highs reaching up to 30°C (86°F) and lows dropping to around 22°C (72°F).

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

September Precipitation in Sibolga

In Sibolga in September, the total precipitation amount reaches 362 mm (14.3 in) over the course of 25 days.

September Precipitation Trends in Sibolga

The chart displays monthly precipitation patterns in Sibolga, 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 Sibolga, September typically receives around 362 mm (14.3 inches) of precipitation spread over approximately 25 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 Sibolga

In Sibolga in September, humidity is 87%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities particularly strenuous and requiring frequent breaks for hydration and shade.

September Average Humidity in Sibolga

This chart illustrates the average monthly humidity levels in Sibolga, 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 Sibolga is approximately 87%, 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 Sibolga

In Sibolga 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 Sibolga.

Maximum UV Index Levels in Sibolga for September

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

Data source: Sibolga 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 Sibolga Compares to Other Months

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

This table compares monthly weather conditions in Sibolga, 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)	280 mm (11.0 inches)	81%	extreme
February Weather	26°C (79°F)	278 mm (10.9 inches)	75%	extreme
March Weather	26°C (79°F)	469 mm (18.5 inches)	78%	extreme
April Weather	26°C (79°F)	418 mm (16.5 inches)	80%	extreme
May Weather	26°C (80°F)	324 mm (12.8 inches)	83%	extreme
June Weather	26°C (80°F)	174 mm (6.8 inches)	84%	extreme
July Weather	26°C (79°F)	250 mm (9.8 inches)	83%	extreme
August Weather	26°C (78°F)	236 mm (9.3 inches)	86%	extreme
September Weather	25°C (78°F)	362 mm (14.3 inches)	87%	extreme
October Weather	25°C (78°F)	389 mm (15.3 inches)	88%	extreme
November Weather	25°C (78°F)	585 mm (23.0 inches)	87%	extreme
December Weather	26°C (78°F)	467 mm (18.4 inches)	85%	extreme