🌦️ MeteoSwiss LLM Tools

Swiss weather data for AI assistants — powered by MeteoSwiss Open Data, the same data behind the MeteoSwiss app and website. Free, no API key required.

meteoswiss-mcp.ars.is — try the hosted service instantly, no setup needed.

• Multi-day forecasts for ~6000 Swiss locations (postal codes, stations, place names)
• Real-time measurements from ~160 automatic weather stations, updated every 10 minutes
• Station discovery by name, canton, or GPS coordinates
• Pollen monitoring from ~15 stations across Switzerland
• MeteoSwiss website search and content retrieval

Choose Your Approach

This monorepo offers two ways to bring Swiss weather data into AI assistants:

	MCP Server	Agent Skill
How it works	Standalone server exposing structured tools via MCP	Teaches agents to call MeteoSwiss APIs directly via HTTP
Best for	Claude Desktop, Claude.ai, any MCP client	Claude Code, Cursor, agents without MCP support
Features	Fuzzy station matching, geocoding, structured JSON, prompts	Lightweight, no server process, shell scripts included
Install	One-liner or Docker	Skill package or symlink
Requires	Node.js 22+ (or Docker)	curl, awk, jq

MCP Server — Quickstart

Use the hosted instance (no installation):

# Claude Code
claude mcp add meteoswiss https://meteoswiss-mcp.ars.is/mcp

For Cursor, install from the Cursor Directory or add manually via Settings → MCP.

Or self-host with Docker:

docker run -p 3000:3000 ghcr.io/eins78/meteoswiss-mcp:latest

See the meteoswiss-mcp README for Claude Desktop setup, environment variables, and full documentation.

Agent Skill — Quickstart

Install via the Claude Code plugin marketplace:

/plugin marketplace add eins78/meteoswiss-llm-tools
/plugin install meteoswiss-skills@meteoswiss-marketplace

Or with the Skills CLI:

pnpx skills add https://github.com/eins78/meteoswiss-llm-tools.git#packages/meteoswiss-skills --global --agent claude-code --all

See the meteoswiss-skills README for manual installation and details.

Available Tools (MCP Server)

Tool	Description
meteoswissLocalForecast	Multi-day forecasts by postal code, station, or place name
meteoswissCurrentWeather	Real-time measurements (temperature, wind, humidity, pressure)
meteoswissStations	Search station network by name, canton, or coordinates
meteoswissPollenData	Pollen concentration data from monitoring stations
search	Search MeteoSwiss website content (DE, FR, IT, EN)
fetch	Fetch full content from MeteoSwiss pages

Example Questions

Works with both approaches — just ask in any of Switzerland's four languages:

• "What's the weather forecast for Zurich this week?"
• "Wie wird das Wetter in Bern morgen?"
• "Quelle est la météo à Genève?"
• "Che tempo fa a Lugano?"

Packages

Package	Version	Description
meteoswiss-mcp		MCP server with structured tools, fuzzy matching, and geocoding
meteoswiss-skills	1.0.0	Agent skill — direct HTTP access, no server needed

Development

git clone https://github.com/eins78/meteoswiss-llm-tools.git
cd meteoswiss-llm-tools
nvm use && pnpm install

See each package's README for package-specific commands. The repo uses changesets for versioning.

Data Source

All weather data comes from MeteoSwiss Open Government Data (OGD) — the official free data offering from Switzerland's Federal Office of Meteorology and Climatology. The same data powers the MeteoSwiss app and website.

License

CC0-1.0 — public domain