For runners
Should you run today?
Wyndo is a weather decision engine, not a forecast app. It reads conditions, runs them through a deterministic engine tuned for running, and gives you a direct go now, leave at <time>, wait, or avoid — with the reasoning behind it.
What Wyndo considers for a run
Heat index, not just temperature
Humid 32°C is harder on cardio than dry 32°C. Wyndo uses the Rothfusz heat-index formula (same one NWS uses) so muggy conditions score correctly.
Air quality, with cardio scaling
Higher minute-ventilation means a runner pulls in more particulate than someone walking. Wyndo's veto threshold for running AQI is tighter than for walking.
Wind, sustained and gust
25 km/h sustained wind affects pace; a 50 km/h gust on an exposed trail affects footing. Wyndo flags both, with thresholds tuned for runners specifically.
Dry-ground signal for trails
Live NWS station precipitation observations plus recent Open-Meteo precipitation buckets. The dry-ground signal reflects what actually fell in the last hour, not just a forward rain probability.
Sun + UV exposure
Long noon runs in July at UV 9+ get a caution; the system tracks UV alongside wind and temperature so it isn't a silent input.
Sunrise / sunset gating
Practical-hour gates respect daylight at your latitude. No grinding through a forecast to figure out whether you have light for an out-and-back.
When Wyndo earns its keep
Noon run on a heat-advisory day
Heat index, dry-ground signal, AQI, sun-exposure — all factored. If you'd be a danger to yourself outside, Wyndo says wait and tells you when the next safe window opens.
Long run window planning
Ask for the best 60-minute window in the next 6 hours. Wyndo searches at 5-minute resolution and surfaces the calmest, driest stretch — with the reasoning you can verify against the forecast.
Trail vs. road decision
Recent precipitation matters more for trail than for road. Wyndo combines NWS station precipitation observations with recent Open-Meteo precipitation buckets to factor in what actually fell, not just the forward forecast.
Pre-dawn / post-sunset timing
Practical-hour gates respect daylight. No more grinding through a forecast trying to figure out whether sunrise gives you enough light for an out-and-back.
Try it now
Ask Wyndo a question about your next run. No account needed for one query.