Open-Meteo MCP Server

Give any LLM accurate weather data: forecasts, history back to 1940, air quality, marine conditions, floods and climate projections.

Features • Getting started • Tools • Remote deployment • Configuration • Development

A Model Context Protocol server for the free Open-Meteo APIs. Plug it into Claude Desktop, Claude Code or any MCP client, then ask in plain language:

What were the temperatures in London during January 2023?
Compare the ICON and GFS ensemble forecasts for Berlin over the next 5 days.
Give me the current European AQI, UV index and pollen levels in Paris.

No API key is needed: Open-Meteo is free for non-commercial use.

Features

• 17 tools covering forecasts, ERA5 history, air quality, marine, flood, seasonal, ensemble and CMIP6 climate data, plus geocoding and elevation
• Model-specific forecasts from DWD ICON, NOAA GFS, Météo-France, ECMWF, JMA, MET Norway and Environment Canada GEM
• Built for LLMs: strict input schemas, server instructions that tell the model which tool answers which question, compact JSON responses capped at 25,000 characters
• Two transports: stdio for local clients, stateless Streamable HTTP for remote deployments, with API key auth, rate limiting and origin checks
• In-memory response cache with per-endpoint TTLs, so repeated questions don't hit Open-Meteo again
• Self-hosting friendly: every Open-Meteo endpoint can point at your own instance

Getting started

You need Node.js 22 or later. Nothing to install beforehand: npx fetches the server on first run.

Claude Desktop

Add the server to your claude_desktop_config.json:

{
  "mcpServers": {
    "open-meteo": {
      "command": "npx",
      "args": ["-y", "-p", "open-meteo-mcp-server", "open-meteo-mcp-server"]
    }
  }
}

Claude Code

claude mcp add open-meteo -- npx -y -p open-meteo-mcp-server open-meteo-mcp-server

Other MCP clients

Any client that launches stdio servers works with the same command: npx -y -p open-meteo-mcp-server open-meteo-mcp-server. You can also install it globally with npm install -g open-meteo-mcp-server and run open-meteo-mcp-server.

[!TIP] Every data tool takes coordinates. Ask with a place name and the model will call geocoding first to resolve it.

Tools