What is the typical weather for Chicago Triathlon?

Chicago Triathlon is usually held around August. Chicago is usually warm and urban, with Lake Michigan wind and heat as the main checks.

How should athletes check Chicago Triathlon race-day weather?

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

Chicago, Illinois

Chicago Triathlon weather

Chicago is usually warm and urban, with Lake Michigan wind and heat as the main checks.

OlympicAugustInland-water swim

Typical race window

August conditions for Chicago, Illinois

Climate normals are temporarily unavailable. Use the swim, bike and run notes below as the evergreen course-weather read, then build a race-day forecast once your date enters the live forecast window.

Swim

Lake Michigan can be calm or choppy depending on wind direction and local conditions.

Bike

Urban roads make wind, wet surfaces and visibility relevant for handling.

Run

Heat and humidity can build quickly on the lakefront run.

Live race-day forecast

Build the exact read when your date matters.

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

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