September Weather in Slawi, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Slawi, Indonesia is a pleasant 26°C (79°F), with a minimum of 20°C (69°F) and a maximum of 31°C (89°F). Expect about 67 mm (2.6 in) of precipitation over approximately 11 days, coupled with an average humidity of 72%. Sail through the month with comfort and prepare for a mix of sunshine and occasional rain!

September Temperature in Slawi

In September in Slawi, the average temperature is 26°C (79°F), with maximums reaching 31°C (89°F) and minimums dropping as low as 20°C (69°F). This makes it an ideal time for travelers to enjoy pleasant weather and outdoor activities.

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

The chart illustrates September temperature patterns in Slawi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Slawi, September typically has an average temperature of 26°C (79°F), with highs reaching up to 31°C (89°F) and lows dropping to around 20°C (69°F).

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

September Precipitation in Slawi

In Slawi in September, the total precipitation amount is 67 mm (2.6 in) over the course of 11 days.

September Precipitation Trends in Slawi

The chart displays monthly precipitation patterns in Slawi, 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 Slawi, September typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 11 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 Slawi

In Slawi in September, humidity is 72%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities feel a bit more strenuous but also adding a tropical charm to your travels.

September Average Humidity in Slawi

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

In Slawi 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 Slawi, you can check here.

Maximum UV Index Levels in Slawi for September

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

Data source: Slawi 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 Slawi Compares to Other Months

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

This table compares monthly weather conditions in Slawi, 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)	428 mm (16.8 inches)	84%	extreme
February Weather	26°C (79°F)	470 mm (18.5 inches)	87%	extreme
March Weather	26°C (80°F)	451 mm (17.8 inches)	85%	extreme
April Weather	27°C (81°F)	373 mm (14.7 inches)	82%	extreme
May Weather	27°C (81°F)	153 mm (6.0 inches)	81%	extreme
June Weather	26°C (80°F)	115 mm (4.5 inches)	81%	very high
July Weather	26°C (78°F)	32 mm (1.2 inches)	79%	very high
August Weather	25°C (78°F)	27 mm (1.1 inches)	76%	extreme
September Weather	26°C (79°F)	67 mm (2.6 inches)	72%	extreme
October Weather	27°C (80°F)	124 mm (4.9 inches)	74%	extreme
November Weather	27°C (80°F)	344 mm (13.6 inches)	78%	extreme
December Weather	26°C (80°F)	460 mm (18.1 inches)	78%	extreme