September Weather in Roy, Belgium

Last updated: August 22, 2025

In September, the average temperature in Roy, Belgium hovers around 14°C (58°F), with a minimum of 1°C (35°F) and a maximum of 33°C (91°F). Expect precipitation to be around 73 mm (2.9 in) over 10 days, and prepare for high humidity levels at 81%.

September Temperature in Roy

In September in Roy, the average temperature is 14°C (58°F). The maximum can reach 33°C (91°F), while the minimum can drop to as low as 1°C (35°F). Be prepared for a wide range of temperatures when traveling during this month.

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

The chart illustrates September temperature patterns in Roy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Roy, September typically has an average temperature of 14°C (58°F), with highs reaching up to 33°C (91°F) and lows dropping to around 1°C (35°F).

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

September Precipitation in Roy

In Roy in September, the precipitation amount is 73 mm (2.9 in) over the course of 10 days.

September Precipitation Trends in Roy

The chart displays monthly precipitation patterns in Roy, 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 Roy, September typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 10 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 Roy

In Roy in September, humidity is 81%. With an average temperature of 14°C (58°F), this humidity feels like a warm blanket wrapping around you, making outdoor adventures sticky and challenging, while also providing a lush, vibrant atmosphere perfect for exploring.

September Average Humidity in Roy

This chart illustrates the average monthly humidity levels in Roy, 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 Roy is approximately 81%, 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 Roy

In Roy in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Roy, you can refer to this Hourly UV Index in Roy.

Maximum UV Index Levels in Roy for September

The chart shows the monthly maximum UV Index (UVI) for Roy 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 Roy typically reaches 6, which falls under the high exposure category.

Data source: Roy 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 Roy Compares to Other Months

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

This table compares monthly weather conditions in Roy, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	91 mm (3.6 inches)	91%	low
February Weather	4°C (39°F)	85 mm (3.3 inches)	90%	moderate
March Weather	6°C (43°F)	101 mm (4.0 inches)	87%	moderate
April Weather	9°C (48°F)	46 mm (1.8 inches)	84%	moderate
May Weather	12°C (54°F)	81 mm (3.2 inches)	77%	very high
June Weather	17°C (63°F)	90 mm (3.5 inches)	74%	very high
July Weather	18°C (64°F)	86 mm (3.4 inches)	72%	very high
August Weather	18°C (64°F)	83 mm (3.3 inches)	71%	high
September Weather	14°C (58°F)	73 mm (2.9 inches)	81%	high
October Weather	11°C (51°F)	94 mm (3.7 inches)	88%	moderate
November Weather	6°C (42°F)	69 mm (2.7 inches)	91%	low
December Weather	4°C (39°F)	130 mm (5.1 inches)	92%	low