https://nanobotco.github.io/rain-chiang-mai/
One page. The top answers "is it raining in Chiang Mai right now?" in the browser: it samples the latest RainViewer radar frame within 3.5 km of the chosen place (and 25 km for "nearby"), and reads the current 15-minute block and 12-hour chances from Open-Meteo. Below: monthly normals, rain clock, royal rainmaking, floods, legends, sources.
Edit docs/index.html directly. tools/card.html renders docs/card.jpg in headless Chrome.
Rain clock numbers come from the weather-north project (Chiang Mai METAR, Sep 2024 – Sep 2026).
Text CC BY 4.0. Photos from Wikimedia Commons keep their own licences, credited on the page.