About klarwetter.de

klarwetter.de is a modern German weather site that gathers forecasts and official data in a clear, fast interface — for Germany, Austria and Switzerland.

Our data sources

• Deutscher Wetterdienst (DWD) — official warnings (yellow / orange / red / violet), pollen, climate normals
• Global weather models (ECMWF, GFS, ICON) — 16-day forecast, UV, air quality
• Open-Meteo — models (incl. DWD-ICON), pollen (CAMS), marine & agronomy data
• Umweltbundesamt — air quality (reference)
• RainViewer — rain radar

Technology

Built with vanilla PHP, no framework. File cache + cron warming load pages in ~1 second despite several external APIs. Leaflet maps, self-hosted fonts (CLS = 0).

Our promise

• Fast — under one second, no blocking third-party scripts.
• Honest — we always show the source; if a forecast is uncertain, we say so.
• Ad-free — no banners, no popups, no tracking.
• Official sources — DWD and open data.

Questions? Write to us via the contact page.