What is the typical weather for Ironman Mont-Tremblant?

Ironman Mont-Tremblant is usually held around August. Mont-Tremblant is usually warm but variable, with lake conditions and mountain weather both in play.

How should athletes check Ironman Mont-Tremblant race-day weather?

Use the race-day planner when the forecast window opens, then check official event and local safety guidance before final decisions.

Mont-Tremblant, Quebec

Ironman Mont-Tremblant weather

Mont-Tremblant is usually warm but variable, with lake conditions and mountain weather both in play.

IronmanAugustInland-water swim

Typical race window

August weather in Mont-Tremblant, Quebec

Monthly climate normal from 2016-2025 archive data.

August

Air temperature

15°C-23°C

Average wind

14 km/h

Peak daily wind

26 km/h

Wet-day chance

47%

A typical day in August averages 4.3 mm of precipitation, with average gusts around 35 km/h. Treat this as planning context, not a live forecast.

Jan

-5°C

Feb

-3°C

Mar

2°C

Apr

9°C

May

18°C

Jun

22°C

Jul

25°C

Aug

23°C

Sep

20°C

Oct

13°C

Nov

4°C

Dec

-2°C

Swim

The lake swim is protected from surf but can still be cool or choppy in wind.

Bike

Rolling terrain and changing shelter make wind and wet pavement important.

Run

The run often hinges on heat, humidity and late-day storm risk.

Live race-day forecast

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This race page stays evergreen. For date, start time and expected segment durations, open the race-day planner with Mont-Tremblant, Quebec prefilled.

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