Chartpixel (http://chartpixel.com) analyzes data (possible sources: see image 1) and generates visualizations. Can build a database from a search but ⚠️ does not cite its sources. Free beta, 10 MB import. Export png.
2 Chartpixel tests to discover: – from http://meteo.data.gouv csv: http://chartpixel.com/project?id=OnShNgLX… – from a “Besançon weather” search request: http://chartpixel.com/project?id=bQUk2IRj…