May Weather in Brussels, Canada

Last updated: June 18, 2025

In May, the average temperature in Brussels, Canada hovers around 13°C (55°F), making it a mild yet unpredictable month. Expect minimums to dip to -4°C (25°F), while the mercury can rise as high as 30°C (87°F). With a precipitation amount of 102 mm (4.0 in) spread over about 12 days, pack accordingly for some wet weather. High humidity levels at 82% can make the air feel a bit heavier, so be prepared for a range of conditions!

May Temperature in Brussels

In May in Brussels, the average temperature is 13°C (55°F). The maximum can reach 30°C (87°F) and the minimum can be as low as -4°C (25°F). Be prepared for a range of temperatures, making it wise to pack both warm and lightweight clothing for your travels.

May Weather in Brussels: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Brussels, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brussels, May typically has an average temperature of 13°C (55°F), with highs reaching up to 30°C (87°F) and lows dropping to around -4°C (25°F).

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

May Precipitation in Brussels

In Brussels in May, the total precipitation amount is 102 mm (4.0 in), occurring over a span of 12 days.

May Precipitation Trends in Brussels

The chart displays monthly precipitation patterns in Brussels, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Brussels, May typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Brussels

In Brussels in May, humidity is 82%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities sticky and uncomfortable for traveling.

May Average Humidity in Brussels

This chart illustrates the average monthly humidity levels in Brussels, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Brussels is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Brussels

In Brussels in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Brussels.

Maximum UV Index Levels in Brussels for May

The chart shows the monthly maximum UV Index (UVI) for Brussels in May, 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 May, the maximum UV index in Brussels typically reaches 9, which falls under the very high exposure category.

Data source: Brussels May 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 May Weather in Brussels Compares to Other Months

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

This table compares monthly weather conditions in Brussels, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	77 mm (3.0 inches)	90%	low
February Weather	-5°C (24°F)	87 mm (3.4 inches)	90%	moderate
March Weather	0°C (32°F)	74 mm (2.9 inches)	87%	moderate
April Weather	5°C (42°F)	105 mm (4.1 inches)	87%	very high
May Weather	13°C (55°F)	102 mm (4.0 inches)	82%	very high
June Weather	18°C (65°F)	98 mm (3.9 inches)	81%	very high
July Weather	21°C (70°F)	86 mm (3.4 inches)	79%	very high
August Weather	20°C (68°F)	126 mm (4.9 inches)	80%	very high
September Weather	16°C (61°F)	98 mm (3.9 inches)	81%	high
October Weather	10°C (50°F)	123 mm (4.8 inches)	84%	moderate
November Weather	2°C (36°F)	103 mm (4.1 inches)	88%	moderate
December Weather	-2°C (30°F)	83 mm (3.3 inches)	87%	low