What should I wear for a run in changing weather?

Dress for the effort and the exposure, rather than the temperature alone. Wind, rain, daylight and the time you will spend waiting affect the choice. Use a familiar layer you can adjust, keep visibility in mind and plan a way home if the conditions change. The weather calculator supplies context, not a clothing prescription.

What changes in rain and wind?

Choose a layer you have tested while moving. A jacket that feels comfortable standing still may trap too much heat during a sustained run. Check the route and the return trip before leaving.

What belongs in a race-week test?

Run in the socks, shoes and layers you intend to use. Practice carrying or discarding a layer within the event’s rules. Do not make the start line your first experiment.

How do I use the heat tool?

Compare the conditions with a familiar training day, then start by effort. Dew point describes moisture; the tool does not measure all of the environmental stress you will experience.

Where does this guidance come from?

See the source below for the underlying rules or evidence. Practical training advice should be adapted to your experience and circumstances.

Read the source

Use the related calculator

Breno Melo

Boston endurance coach since 2015. RRCA, USA Triathlon and TrainingPeaks Level 2 certified. Background & experience.

Published 11 October 2026. Editorial source check: 11 October 2026. Personal coaching review has not been represented as completed.

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