The datasetAll stages at a glance
Each tile represents one stage’s mean air temperature or WBGT (pick a metric below), averaged across its route and duration. Read the chart from 1950 on the left to 2026 on the right; in temperature view, outlined tiles mark stage averages above 30°C. Both metrics show a large range from weather fluctuations and route characteristics, but the increasing number of red tiles in recent years is undeniable.