Brussels Weather in May
Belgium · Oceanic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
May in Brussels sees average temperatures ranging from a low of 8.8°C (47.8°F) to a high of 18.1°C (64.6°F), with a mean of 13.5°C (56.3°F). Compared to the annual average of 11.5°C (52.7°F), this month is 2.0°C warmer than the yearly norm. Precipitation averages 63.6mm, making it approximately 10.0mm drier than the monthly average of 73.0mm. The city receives an average of 10.9 hours of sunshine per day during May, with relative humidity averaging 72.1%. Wind speeds reach an average maximum of 19.9 km/h. For travelers, this month offers a temperature experience in Brussels, with drier-than-average conditions compared to the rest of the year.
Brussels has an oceanic climate similar to London but with slightly warmer summers. I've studied the data and found that the city receives moderate rainfall year-round, with no distinct dry season. The best time for visiting is May to September, when temperatures are most pleasant and the city's outdoor cafés and markets are at their best.
May vs Adjacent Months
| Metric | April | May | June |
|---|---|---|---|
| Mean Temp | 9.4°C (48.9°F) | 13.5°C (56.3°F) | 17.6°C (63.7°F) |
| Rainfall | 51.5mm | 63.6mm | 79.2mm |
| Sunshine | 9.5 hrs | 10.9 hrs | 11.6 hrs |
| Humidity | 70.8% | 72.1% | 70.7% |
| Wind | 20.7 km/h | 19.9 km/h | 18.1 km/h |
| Rainy Days | 15.6 | 17.2 | 16.2 |
| Snowfall | 1.9 cm | 0.0 cm | 0.0 cm |
Seasonal Context
May falls in Spring in the Northern Hemisphere. Spring is a transitional season with temperatures rising from winter lows. For travelers visiting Brussels in May, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Brussels in May?
The average temperature in Brussels during May ranges from 8.8°C (47.8°F) to 18.1°C (64.6°F), with a mean of 13.5°C (56.3°F).
How much does it rain in Brussels in May?
Brussels receives an average of 63.6mm of precipitation in May, spread across approximately 17.2 rainy days.
What should I pack for Brussels in May?
Based on May weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is May a good time to visit Brussels?
May is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Brussels
Cities with Similar May Climate (Oceanic)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 50.85°, 4.35°. Timezone: Europe/Brussels. Last updated: 2026-07-30.