Weather in May
Temperature
May's arrival coincides with a subtle temperature rise, moving from April's refreshing 14.2°C (57.6°F) to a comfortable 18.1°C (64.6°F). During May, Brussels records a consistent average nighttime temperature of 9.2°C (48.6°F).Humidity
The average relative humidity in May is 73.2%.Rainfall
In May, the rain falls for 16.2 days. Throughout May, 67mm (2.64") of precipitation is accumulated. In Brussels, Belgium, during the entire year, the rain falls for 199.6 days and collects up to 853mm (33.58") of precipitation.Snowfall
In Brussels, snow does not fall in May through October.Daylight
The average length of the day in May is 15h and 33min.On the first day of the month, sunrise is at 06:15 and sunset at 21:04. On the last day of May, sunrise is at 05:34 and sunset at 21:46 CEST.
Sunshine
In Brussels, the average sunshine in May is 6.2h.UV index
In May, the average daily maximum UV index in Brussels is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A maximum UV index of 6 in May translates into the following recommendations:
Ward off overexposure. Defence against solar harm is crucial. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
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Average temperature in May
Brussels, Belgium
- Average high temperature in May: 18.1°C
The warmest month (with the highest average high temperature) is July (23°C).
The month with the lowest average high temperature is January (5.7°C).
- Average low temperature in May: 9.2°C
The month with the highest average low temperature is July (14°C).
The coldest months (with the lowest average low temperature) are January and February (0.7°C).
Average humidity in May
Brussels, Belgium
- Average humidity in May: 73.2%
The month with the highest relative humidity is December (88.8%).
The month with the lowest relative humidity is April (72.5%).
Average rainfall in May
Brussels, Belgium
- Average rainfall in May: 66.5mm
The wettest month (with the highest rainfall) is December (81mm).
The driest month (with the least rainfall) is April (51.3mm).
Average rainfall days in May
Brussels, Belgium
- Average rainfall days in May: 16.2 days
The month with the highest number of rainy days is December (19.3 days).
The month with the least rainy days is July (14.3 days).
Average snowfall days in May
Brussels, Belgium
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (5.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Brussels, Belgium
- Average daylight in May: 15h and 3min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in May: 6h and 1min
The month with the most sunshine is July (Average sunshine: 6h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 30min).
Average UV index in May
Brussels, Belgium
- Average UV index in May: 6
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 1).
Brussels, Belgium
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