Introduction
DWD Precipitation is a custom integration for Home Assistant that brings the precipitation radar of the German Weather Service (Deutscher Wetterdienst, DWD) to your exact location: how much rain fell, how much is coming in the next two hours, how hard it is raining, and what is falling.
The integration only works for locations in Germany and a narrow band beyond its borders. The DWD radar composites do not cover other countries.
Features
- Location-precise: every value comes from the radar grid cell of about 1 km × 1 km that contains your coordinates.
- Live: the nowcast sensors refresh every 5 minutes.
- Two-hour forecast: forecast totals, peak intensity, the wettest hour ahead, and when rain starts and stops.
- Precipitation type: rain, drizzle, snow, sleet, graupel, hail, freezing rain.
- Measured totals: the past hour, the past 24 hours, yesterday, and a days-without-rain counter.
- Long-term totals: running rain totals for Home Assistant's statistics, so daily, weekly, monthly and yearly sums work out of the box.
- Rain warnings: your own warnings, such as "Laundry, 60 minutes ahead", each an on/off entity for automations, optionally only for rain above a minimum.
- Rain events for blueprints (optional): each burst of rain followed under one id from forecast to measurement, with forecast and measured amounts side by side.
- No account, no API key: the data comes from DWD Open Data, which anyone can download.
The DWD products it reads
The integration reads five DWD products. Each one has its own update schedule, and the entities are grouped by product in these docs.
| Product | What it is | Updated | Entities |
|---|---|---|---|
| RADVOR RS | Radar nowcast: rolling 60-minute totals, measured and forecast | every 5 min | Precipitation last / next 60 min, … |
| RADVOR RV | Radar nowcast in 5-minute steps, two hours ahead | every 5 min | Intensity, peaks, start and end, … |
| HymecNG | Precipitation type classified from radar | every 5 min | Precipitation type now |
| RADOLAN RW | Radar analysis of one hour, corrected with rain gauges | hourly | Precipitation previous hour, Precipitation total |
| RADOLAN SF | Radar analysis of 24 hours, corrected with rain gauges | hourly / daily | Precipitation last 24h, yesterday |
The RADVOR and HymecNG values come from radar alone and are fast. The RADOLAN values are corrected with rain-gauge measurements: they arrive about 30 minutes later, but are more accurate. The DWD products explains the difference.
Where to go next
- Install the integration, then set it up and pick your options.
- Entities lists every sensor, with its unit and update interval.
- Something looks wrong? See Troubleshooting and the FAQ.
- Upgrading from a version before 2026.11.0? Upgrading lists what changed, including renamed entities.
This is a community project. It is not affiliated with or endorsed by the Deutscher Wetterdienst. All data is © DWD and used under the DWD Open Data terms of use.