Weather: Brussels Marathon
Historical weather data for race day in May. Use this to plan your race strategy, clothing, and hydration.
12°C
Temperature
Range: 9°C – 15°C
72%
Humidity
Moderate
45%
Rain Chance
Possible — check forecast
May
Typical race month
Usually on a Sunday
Conditions
Early autumn in Brussels brings mild temperatures with occasional rain showers. Runners should expect cool conditions that are ideal for long-distance running, though waterproof gear is recommended.
What to Wear
Light gloves
Useful at the start, tuck away later
Long sleeve or arm warmers
Versatile for cool starts
Hat with brim
Keep rain out of your eyes
Anti-chafe cream
Wet conditions increase chafing risk
Hydration Strategy
Before the Race
Normal hydration. Drink to thirst in the 24 hours before. Avoid over-hydrating.
During the Race
Drink at aid stations every 3-4km. Alternate water and sports drink.
After the Race
Rehydrate within 30 minutes of finishing. A drink with electrolytes and some protein helps recovery.
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