Weather: Rotterdam Half Marathon
Historical weather data for race day in September. Use this to plan your race strategy, clothing, and hydration.
16°C
Temperature
Range: 12°C – 20°C
72%
Humidity
Moderate
35%
Rain Chance
Possible — check forecast
September
Typical race month
Usually on a Sunday
Conditions
Early autumn in Rotterdam brings mild temperatures perfect for racing, with occasional rain and a refreshing breeze off the North Sea. Conditions are typically ideal for fast half-marathon times.
What to Wear
Singlet or short sleeve
Ideal racing temperatures
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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