Environmental conditions on race day for each year
| Temperature (°C) | Humidity (%) | Rainfall (mm) | Wind speed (knots) | WBGT index* | |
|---|---|---|---|---|---|
| 2008 | 18.2 (1.9) | 77 (8) | 0 | 9.6 (2.4) | 16.5 (2.4) |
| 2009 | 17.1 (1.4) | 83 (7) | 0 | 7.8 (1.0) | 15.4 (1.6) |
| 2010 | 16.3 (0.8) | 93 (3) | 0 | 3.5 (0.6) | 15.2 (1.4) |
| 2011 | 11.5 (2.1) | 87 (2) | 0 | 1.5 (1.3) | 13.5 (2.9) |
Values are mean (SD).
*Wet Bulb Globe Temperature (WBGT) index—calculated using temperature (°C), humidity, time of day and cloud cover data.