Weatherly is a full-screen OpenStreetMap canvas built with React and Leaflet: click any point on the map, or search a city or postcode, and it renders local conditions from the Open-Meteo forecast and geocoding APIs. There is no API key and no backend — both endpoints are public and called directly from the browser.
The forecast panels cover temperature, apparent temperature, humidity, precipitation, cloud cover, wind speed, gusts and compass direction, then the next 24 hours at three-hour steps and a seven-day outlook with highs, lows, precipitation chance, and sunrise and sunset. A units switch swaps Celsius and Fahrenheit along with wind (km/h ↔ mph) and precipitation (mm ↔ inch).
Most of the design effort went into the states around the happy path. Place search is debounced, geolocation degrades gracefully when permission is denied or the context is insecure, and loading, empty, geolocation-error, and service-error states are explicit rather than implied by a blank panel. The interface theme is derived from the WMO weather code and the day/night state, so the page itself reflects the conditions being described, and every interactive control carries ARIA labelling.