Find your best outdoor window to run, ride, or hike.
A thermometer can't tell you when to go out today. GoWindow looks at every daylight hour and picks the one that actually fits what you're doing.
Download on the App StoreOne window, picked for what you're doing today
Tell it your sport and how long you want to be out — 1 to 4 hours. It ranks the next three days against what that sport actually needs, then points at the best stretch.
Different sport, different score
Running leans on air temperature and dew point. Cycling scores sustained wind and gusts. Hiking adds UV, trail wetness, and thunderstorm risk. The inputs change with the activity.
More than one number
GoWindow scores air temperature, dew point, sustained wind, gusts, precipitation, visibility, and estimated heat stress separately instead of combining them into a single feels-like value.
The risks a forecast tends to bury
UV load, heat stress, thunderstorm timing, and air quality when smoke or haze are around. If conditions get risky, the score moves.
Open it, see the window, go
Today's window is right there on the first screen. No scrubbing through hourly charts to figure out what it means.
What we look at
Comfort
Air temperature, dew point, sustained wind, and gusts. The conditions that change how hard an hour outside will feel.
Hazards
Precipitation timing, UV, estimated WBGT, forecast thunderstorms, and official weather alerts.
Air
US AQI enters each activity score when available. If no AQI arrives, GoWindow does not invent a number.
How it works
Pick your sport
Running, cycling, or hiking, with a window length from 1 to 4 hours. Scoring shifts to match.
See today's window
A single block at the length you picked, the score behind it, and what the conditions look like through it.
Head out
Or check tomorrow if today isn't it. That's the whole flow.
Pro for the places you actually use
Save up to 10 places, score all three sports together, and see every hour of the next three days.
10 saved places
Keep home, parks, trailheads, offices, and trip spots ready.
All three sports
Running, cycling, and hiking scored together, with multi-sport widgets so every score is one glance away.
Hour-by-hour detail
Tap any hour to see what's helping or hurting the score across the full three-day forecast.
GoWindow for your sport
Scoring tuned to what your activity actually needs.
Runners
Air temperature, dew point, wind, UV, precipitation, and AQI are scored hour by hour for runners.
Cyclists
Wind, gusts, precipitation timing, and temperature — scored for cyclists who need to know before they clip in.
Hikers
UV, temperature, thunderstorm timing, and air quality — scored for hikers who spend hours above the treeline.