Decision weather
Weather for running
A temperature number is not a running plan. WeatherPerch combines rain probability, wind, heat or cold stress, daylight, and air quality to help you choose a workable window.
Live windows
See the strongest hours in a city’s next forecast window.
Explainable risk
Each elevated factor is shown, with thresholds and official-source context.
City comparisons
Read climate-normal rankings for longer-term race or training decisions.
Choose a city → or read the methodology.