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September Weather in Boussu, Belgium

Last updated: August 22, 2025

In September, the average temperature in Boussu, Belgium is a pleasant 16°C (60°F). Expect temperatures to range from a cool 3°C (38°F) to a warm 33°C (91°F). During this month, you'll encounter 49 mm (1.9 in) of precipitation spread over 9 days, contributing to an average humidity level of 82%.

September Temperature in Boussu

In September in Boussu, the average temperature is 16°C (60°F), with maximums reaching up to 33°C (91°F) and minimums dropping as low as 3°C (38°F). This variation in temperature makes it essential for travelers to pack both light and warm clothing to stay comfortable throughout their visit.

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

The chart illustrates September temperature patterns in Boussu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boussu, September typically has an average temperature of 16°C (60°F), with highs reaching up to 33°C (91°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec394245505664666660544542
Data source: Temperature data for Boussu 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 Boussu

In Boussu in September, the total precipitation amount is 49 mm (1.9 in) spread over 9 days.

September Precipitation Trends in Boussu

The chart displays monthly precipitation patterns in Boussu, 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 Boussu, September typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec6572733859576079497860100
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Boussu

In Boussu in September humidity is 82%. With an average temperature of 16°C (60°F), this humidity feels like walking through a warm, thick blanket that clings to your skin, making every step feel heavier and travel more exhausting.

September Average Humidity in Boussu

This chart illustrates the average monthly humidity levels in Boussu, 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 Boussu is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%85%82%82%80%76%82%89%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Boussu

In Boussu in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Boussu.

Maximum UV Index Levels in Boussu for September

The chart shows the monthly maximum UV Index (UVI) for Boussu 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 Boussu typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec224578875421
Data source: Boussu 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 Boussu Compares to Other Months

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

This table compares monthly weather conditions in Boussu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)65 mm (2.6 inches)91%low
February Weather5°C (42°F)72 mm (2.8 inches)89%low
March Weather7°C (46°F)73 mm (2.9 inches)87%moderate
April Weather10°C (50°F)38 mm (1.5 inches)85%moderate
May Weather14°C (57°F)59 mm (2.3 inches)82%high
June Weather18°C (65°F)57 mm (2.2 inches)82%very high
July Weather19°C (66°F)60 mm (2.4 inches)80%very high
August Weather19°C (66°F)79 mm (3.1 inches)76%high
September Weather16°C (60°F)49 mm (1.9 inches)82%moderate
October Weather12°C (54°F)78 mm (3.1 inches)89%moderate
November Weather7°C (46°F)60 mm (2.4 inches)92%low
December Weather6°C (42°F)100 mm (3.9 inches)92%low

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