Weather Diamant - Sam's 2026
Forecasts for a 600 UTMB Index runner, at their estimated passage time. Start Sun, 11/01 06:10 AM: Clear night, 82°F. Coldest: 88°F feels-like at Start (Sun, 11/01 06:10 AM); warmest: 83°F at Arrivée (Sun, 11/01 07:22 AM). No notable rain forecast on the course. Gusts up to 22 mph at Arrivée.
Hour by hour, from the start to the estimated finish
| Location | Sun, 11/0106:10 AM |
|---|---|
| Startkm 0 | |
| Arrivéekm 12 |
Local race times (America/Martinique). This race does not publish its cut-off: the finish is estimated for a slow runner, so the last columns are indicative.
Weather for other Diam's Rock races
Section-by-section forecasts for Diamant - Sam's 2026, calculated at the estimated passing time: feels-like temperature, rain or snow, wind and thunderstorms. Three models — AROME (Météo-France), ICON (DWD) and ECMWF IFS — served from the finest to the farthest-reaching.
The weather for the entire race, by 4-hour slots, at the start and at each aid station — to know when rain arrives and which pass gets windy, whatever your pace.
Forecast, not guaranteed: in the mountains a model describes a grid of several hundred meters, not the slope you're on.
Weather data: Météo-France (AROME), DWD (ICON), ECMWF (IFS) — CC BY 4.0, via Open-Meteo