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Boston Marathon: Weather's Cruel Games Revealed
13 Apr
Summary
- Extreme cold in 2018 led to over 2,700 runners needing medical treatment.
- High temperatures in 2012 caused over 2,100 runners to suffer heat-related issues.
- Optimal marathon temperatures can paradoxically increase runner heat stress risk.

The Boston Marathon has a history of challenging weather conditions impacting participants. In 2018, dangerously cold temperatures and wind led to over 2,700 runners receiving medical treatment, with 91 requiring hospitalization. This extreme cold also contributed to a 4.2% "Did Not Finish" rate.
Conversely, the 2012 marathon saw temperatures near 90 degrees, resulting in over 2,100 runners being treated for dehydration and heat exhaustion. Experts emphasize that even moderate temperatures, particularly those comfortable for spectators, can create heat stress for runners due to their exertion.
Physicians advise runners to prepare for dramatic weather shifts, adapt their strategy, and understand that factors like heat, elevation, and wind can significantly affect performance and the body's ability to regulate temperature. Proper hydration and electrolyte balance are crucial for managing both heat and cold stress.
Post-race, it's recommended that runners continue moving to cool down muscles, followed by stretching and rehydration. Consuming sugars and salt soon after finishing aids recovery. Ultimately, runners are encouraged to embrace the experience, regardless of unexpected weather.