Over the past 10 years, Singapore Marathon runners have faced temperatures ranging from 24\u00b0C (76\u00b0F) on cooler years to 30\u00b0C (87\u00b0F) in warmer editions. The median temperature of 28\u00b0C (82\u00b0F) puts this race in the challenging category for running conditions.
Wind speeds average 9 km/h during race hours, with peak gusts reaching 17 km/h in challenging years. Humidity sits around 81%, and there is a 80% chance of rain on race day.
These conditions translate to an estimated pace impact of +13.0% compared to ideal running conditions. For a 4-hour marathoner, that means roughly 31 minutes slower than a perfect-weather day.