Your best window to run
Dew point, apparent temperature, wind, and air quality — scored together for runners, not averaged for everybody.
Why runners need GoWindow
Dew point, not humidity
Relative humidity misleads. Dew point tells you whether your sweat can actually evaporate. GoWindow uses dew point as the primary moisture signal for running.
Apparent temp over raw temp
27°C with wind and low humidity runs different from 27°C dead-still and sticky. The score reflects what the air feels like when you're moving through it.
AQI weighted for effort
You breathe 10-20x harder when running. The score is based on exercise ventilation, not sitting-on-a-bench exposure.
What the running score weighs
How well your sweat evaporates. Drives heart-rate drift more than any other factor.
Feels-like temperature accounting for wind and moisture.
Affects cooling and perceived effort, especially on exposed routes.
Adds up on longer runs. An hour at moderate UV is fine; three hours is a different story.
Ventilation-adjusted dose for runners, sensitive to smoke and haze days.
When rain is expected within the window, the score moves.
When GoWindow helps runners
Picking the cooler slot between a morning and evening run in summer
Deciding whether an air-quality advisory means skipping or just shortening a run
Finding a 1-hour window between rain bands on a rest-day shakeout
Checking whether tomorrow's long-run conditions are worth the alarm
From the blog
AQI and your lungs: what the air quality number means when you're running
When you run, you breathe ten to twenty times harder than at rest. That changes how air pollution lands in your body. Here's what runners should actually do with the AQI number.
Dew point vs humidity: why your weather app lies to runners
Relative humidity tells you almost nothing about how a run will feel. Dew point does. Here's why the distinction matters and how to use it.
Why Timing Matters More Than Temperature
Most people check the temperature before heading out. The best outdoor sessions depend on a narrow window where several conditions line up — not on one number.