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September Weather in Belawan, Indonesia

Last updated: August 23, 2025

In Belawan, Indonesia, the average temperature in September hovers around 27°C (81°F), creating a warm and inviting atmosphere. However, temperatures can dip to a minimum of 23°C (74°F) and peak at a sweltering 33°C (92°F). Be prepared for the wet season as 332 mm (13.1 in) of precipitation typically falls over 27 days, complemented by an average humidity of 89%. Ideal for those who thrive in tropical climates!

September Temperature in Belawan

In September in Belawan, the average temperature is a warm 27°C (81°F). The maximum can reach a hot 33°C (92°F), while the minimum can drop to a comfortable 23°C (74°F). This makes Belawan an ideal destination for travelers seeking pleasant weather and outdoor adventures.

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

The chart illustrates September temperature patterns in Belawan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Belawan, September typically has an average temperature of 27°C (81°F), with highs reaching up to 33°C (92°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec818182838382828281818181
Data source: Temperature data for Belawan generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Belawan

In Belawan in September, the precipitation amount is 332 mm (13.1 in) spread over 27 days.

September Precipitation Trends in Belawan

The chart displays monthly precipitation patterns in Belawan, 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 Belawan, September typically receives around 332 mm (13.1 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec193116152242315196195254332319379328
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Belawan

In Belawan in September humidity is 89%. With an average temperature of 27°C (81°F), this humidity feels like a wet blanket enveloping you, making outdoor activities challenging and travel a little less comfortable.

September Average Humidity in Belawan

This chart illustrates the average monthly humidity levels in Belawan, 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 Belawan is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%74%74%77%83%85%84%87%89%89%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Belawan

In Belawan 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 Belawan, you can check here.

Maximum UV Index Levels in Belawan for September

The chart shows the monthly maximum UV Index (UVI) for Belawan 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 Belawan typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131515151412121314141312
Data source: Belawan 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 Belawan Compares to Other Months

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

This table compares monthly weather conditions in Belawan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)193 mm (7.6 inches)83%extreme
February Weather27°C (82°F)116 mm (4.6 inches)74%extreme
March Weather28°C (83°F)152 mm (6.0 inches)74%extreme
April Weather28°C (83°F)242 mm (9.5 inches)77%extreme
May Weather28°C (83°F)315 mm (12.4 inches)82%extreme
June Weather28°C (83°F)196 mm (7.7 inches)85%extreme
July Weather28°C (82°F)195 mm (7.7 inches)84%extreme
August Weather28°C (82°F)254 mm (10.0 inches)87%extreme
September Weather27°C (81°F)332 mm (13.1 inches)89%extreme
October Weather27°C (81°F)319 mm (12.6 inches)89%extreme
November Weather27°C (81°F)379 mm (14.9 inches)88%extreme
December Weather27°C (81°F)328 mm (12.9 inches)88%extreme

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