Over the past 10 years, Copenhagen Half Marathon runners have faced temperatures ranging from 13\u00b0C (56\u00b0F) on cooler years to 19\u00b0C (66\u00b0F) in warmer editions. The median temperature of 16\u00b0C (61\u00b0F) puts this race in the challenging category for running conditions.
Wind speeds average 22 km/h during race hours, with peak gusts reaching 31 km/h in challenging years. Humidity sits around 72%, and there is a 30% chance of rain on race day.
These conditions translate to an estimated pace impact of +5.3% compared to ideal running conditions. For a 4-hour marathoner, that means roughly 13 minutes slower than a perfect-weather day.