Stage 18 · 10 September 2026

El Puerto de Santa María → Jerez de la Frontera

32.1 kmIndividual time trial

Observed conditions from the ERA5 reanalysis archive.

Observed heat snapshot

-1.5°Cvs the 1974-2023 average at this location (ERA5): 30.2°C

28.7°Cpeak in the race window

Moderate high-risk · 26°C WBGT (est.)

Schematic — real elevation, approximate route between known points, not survey-accurate. Fill colored by temperature.

+10°C26°C+42°C

Decade trend — deviation from the 50-year mean at this location

30.6°C'74–'83

30.8°C'84–'93

29.3°C'94–'03

30.5°C'04–'13

30.0°C'14–'23

-2°C50-yr avg+2°C

A day this hot (≥28.7°C, ERA5 at this location) occurred 110× in 1974-1983 vs. 95× in 2014-2023.

WBGT is an estimate — see methodology. Data as of 2026-09-14T01:03:54.319Z.