Over the past 10 years, Marathon du Medoc runners have faced temperatures ranging from 15\u00b0C (59\u00b0F) on cooler years to 30\u00b0C (86\u00b0F) in warmer editions. The median temperature of 21\u00b0C (70\u00b0F) puts this race in the challenging category for running conditions.
Wind speeds average 10 km/h during race hours, with peak gusts reaching 16 km/h in challenging years. Humidity sits around 64%, and there is a 10% chance of rain on race day.
These conditions translate to an estimated pace impact of +6.1% compared to ideal running conditions. For a 4-hour marathoner, that means roughly 15 minutes slower than a perfect-weather day.