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Weather (Deutsch)

Fast, key-free weather information for everyday use.

Übersicht & Zweck

Answers "What will the weather be like?" questions without an API key (data source: wttr.in). Delivers current weather (temperature, feels-like, wind, humidity, UV) plus a compact 3-day forecast. User-neutral: no fixed location in the code — the location comes from the request or from assist/prefs.json (wetter_default_location), which the LLM fills in interactively with the user.

Triggers

| User input | Action | |---|---| | "Weather for Potsdam?" / "What will the weather be like in Hamburg?" | wetter_core.py "<location>" | | "Weather tomorrow?" (without location) | wetter_core.py --default (location from prefs) | | "My default weather location is Potsdam" | wetter_core.py --set-default "Potsdam" | | Coordinates known | wetter_core.py <lat> <lon> |

Workflow & Vorgehen

1. Determine location: from request; else prefs.json (wetter_default_location);
   else ask user interactively + optionally save as default.
2. Query wetter_core.py (wttr.in, 2 attempts, 30-min cache).
3. Present readable weather text + 3-day forecast.

CLI Entry Point (wetter_core.py)

bash
python wetter_core.py "Potsdam"          # location
python wetter_core.py 52.6789 13.5878   # coordinates
python wetter_core.py --default         # location from prefs.json
python wetter_core.py --set-default "Potsdam"

Store (optional)

• No mandatory store. Optional short cache assist/wetter/.cache.json

(TTL 30 min, best-effort) — avoids repeated network calls.

• Location preference in assist/prefs.json (wetter_default_location).

Attitude

We use wttr.in as the key-free default source, but are open to other weather backends (e.g. DWD/OpenWeather) if the user prefers them.

Privacy

• Only the location name/coordinates go to wttr.in (required for the query).
• No telemetry, no account. Cache + preference stay local.

Related Resources

• assist/AGENTS.md — Umbrella router
• assist/reiseroute/ — uses weather for travel planning (planned)

Änderungsprotokoll

0.1.0 (2026-06-22)

• Initial version. Ported from BACH hub/_services/weather/weather_service.py (MIT).
• Extended: location name support (not just coordinates), 3-day forecast,

optional cache, prefs-based default location. User-neutral.