Weather conditions at the start and finish of the 2009 Mont Saint-Michel Marathon
| Temperature (°C) | Temperature feel (°C)* | Humidity (%) | Wind | |
|---|---|---|---|---|
| Start line | 9 | 5 | 82 | Strong |
| Finish line | 16 | 12 | 60 | Strong |
↵* As assessment of the perceived temperature (influenced by the wind chill factor) as provided by the French National Weather Service.