September Weather in Semilat, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Semilat, Indonesia hovers around 27°C (81°F). This month can bring minimums as cool as 21°C (70°F) and highs peaking at 35°C (96°F). Expect about 170 mm (6.7 in) of precipitation spread over 18 days, creating a humid atmosphere with an average humidity of 79%.

September Temperature in Semilat

In September in Semilat, the average temperature is 27°C (81°F). Maximums can reach 35°C (96°F), while minimums can drop to 21°C (70°F). It's a great time to visit for warm weather and outdoor activities!

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

The chart illustrates September temperature patterns in Semilat, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Semilat, September typically has an average temperature of 27°C (81°F), with highs reaching up to 35°C (96°F) and lows dropping to around 21°C (70°F).

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

September Precipitation in Semilat

In Semilat in September, the precipitation amount is 170 mm (6.7 in) over the course of 18 days.

September Precipitation Trends in Semilat

The chart displays monthly precipitation patterns in Semilat, 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 Semilat, September typically receives around 170 mm (6.7 inches) of precipitation spread over approximately 18 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 Semilat

In Semilat 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 Semilat

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

In Semilat 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 Semilat.

Maximum UV Index Levels in Semilat for September

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

Data source: Semilat 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 Semilat Compares to Other Months

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

This table compares monthly weather conditions in Semilat, 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)	207 mm (8.1 inches)	86%	extreme
February Weather	27°C (81°F)	260 mm (10.3 inches)	86%	extreme
March Weather	27°C (81°F)	255 mm (10.0 inches)	86%	extreme
April Weather	27°C (81°F)	308 mm (12.1 inches)	84%	extreme
May Weather	28°C (82°F)	260 mm (10.2 inches)	83%	extreme
June Weather	27°C (81°F)	230 mm (9.1 inches)	85%	extreme
July Weather	27°C (80°F)	143 mm (5.6 inches)	85%	extreme
August Weather	27°C (80°F)	159 mm (6.2 inches)	85%	extreme
September Weather	27°C (81°F)	170 mm (6.7 inches)	79%	extreme
October Weather	27°C (81°F)	333 mm (13.1 inches)	80%	extreme
November Weather	27°C (81°F)	300 mm (11.8 inches)	80%	extreme
December Weather	27°C (81°F)	234 mm (9.2 inches)	83%	extreme