1
Pick the thing
A bike ride, a run, painting outside, people round for a barbecue, washing on the line, a walk with the dog, stargazing. Each has its own idea of good weather — a runner and a painter don't want the same afternoon.
2
Say where
Type a town or use your location. The forecast comes from Open-Meteo, a free public weather service — no account, no key, and your location goes to them and nowhere else.
3
Read the windows
The best three windows this week, each with why ("dry, light wind, 64°"). Below that, every hour of the week coloured good / marginal / no, so you can see the shape of the week at a glance.