On the Tour de Bourgogne à Vélo loop, the direction you ride changes almost nothing, while the month changes a lot. A headwind on some sections is a tailwind on others, and averaged over the whole route it never exceeds 0.5 km/h in any month. Whether you ride the loop clockwise or anticlockwise, decide based on your overnight stops and railway stations.
September and October instead of July
The best month is September: 76% good days, rain on 20% of days, average high 22 °C (2006–2025). October is nearly as good, at 74%. July and August are hot, with 30 °C or more every fifth day (21% and 20%), and only 60–64% good days. In spring, April is best, at 68%. This is climate, not a forecast (see the climate block on the page).
668 km from Dijon to Dijon
By the OpenStreetMap track, the loop is 668 km. On the 152–202 km sections, where the loop turns west, the wind averages a headwind of 1.9 km/h over the year; on the other sections it evens out. Details are in the table of 25 km sections below the article; the short loop is described on the Petit tour de Bourgogne page.