How it picks a time
The service looks at your hours today and tomorrow in 15-minute slots, drops the slots you can't or don't want
to run in, scores the rest on the weather and picks the best stretch as long as your run.
1. The forecast
Open-Meteo's hourly forecast for your start point, rounded to about 1 km and refreshed every hour. A slot
takes the feels-like temperature and wind speed of the hour it falls in, and the rain and gusts forecast for
that hour.
2. Slots that drop out
- Slots that have already started, and slots outside your hours.
- Slots outside sunrise to sunset, unless Dark is OK.
- Slots whose chance of rain is above your Rain setting, or with 0.2 mm of rain an hour or more.
3. Scoring what is left
Each slot gets penalty points; lower is better. A window's score is the average of its slots.
-
Wind: 1 point per km/h above 12 km/h, plus half a point per km/h of gusts above 30.
- Temperature: 1 point per degree the feels-like temperature is outside 6–16 °C.
- Rain: 1 point per 20 % chance of rain.
Wind usually decides: at 30 km/h it outweighs even a certain shower.
Mind most picks the one that bothers you most: its points count three times. It doesn't set
a limit, because the forecast decides what a day can offer; on a stormy day Wind still gets you the calmest
time there is. Balanced counts all three the same. The Rain slider is the one hard limit.
4. The pick
The lowest score wins; on a tie, the earliest. A window never spans two hour ranges. With a route, the run's
length is its distance at your pace, rounded up to 15 minutes; up to 3 hours.
When no hour-long window is dry enough, the page shows the least bad hour instead and says so: rain no
longer rules slots out, but its chance weighs ten times as much and the amount counts too.
5. The wind line
It gives the window's average wind direction. Start into it, so it is behind you on the way home. With a
loop it says whether to run it as drawn or reversed, from A to B whether it is a head- or tailwind, and
under 10 km/h it just says little wind.
These weights are a starting point and get tuned on real runs. The timeline's shading shows each slot's score.
