Weather Stoneham-et-Tewkesbury, QC - 12km 2026
Forecasts for a 600 UTMB Index runner, at their estimated passage time. Start Sun, 10/25 09:30 AM: Clear sky, 39°F. Coldest: 37°F feels-like at Start (Sun, 10/25 09:30 AM); warmest: 47°F at Arrivée (Sun, 10/25 10:42 AM). No notable rain forecast on the course. Gusts up to 21 mph at Arrivée.
Hour by hour, from the start to the cut-off
| Location | Sun, 10/2509:30 AM |
|---|---|
| Startkm 0 | |
| Arrivéekm 12 |
Local race times (America/Toronto).
Weather for other Trail du Grand-Duc races
Section-by-section forecasts for Stoneham-et-Tewkesbury, QC - 12km 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