Weather MCP Server

Part of the MCP Sidekick project.

An MCP (Model Context Protocol) server that provides weather forecasts using the free Open-Meteo API — geocode locations, get current conditions, hourly forecasts, and daily summaries. No API key required.

Prerequisites

• Node.js >= 18

Setup

1. Install & Build

   cd weather-mcp-server
   npm install
   npm run build

2. Configure in your MCP client — create a .mcp.json file in your project:

   {
     "servers": {
       "weather": {
         "type": "stdio",
         "command": "npx",
         "args": ["-y", "@mcp-sidekick/weather"]
       }
     }
   }

3. Start using — no authentication needed. The Open-Meteo API is free for non-commercial use with up to 10,000 daily API calls.

Available Tools

Geocoding

| Tool | Description | |---|---| | weather_geocode | Search for a location by name or postal code, returns coordinates |

Forecast

| Tool | Description | |---|---| | weather_current | Get current weather conditions for a location | | weather_forecast | Get hourly weather forecast (up to 16 days) | | weather_daily | Get daily weather forecast summary (up to 16 days) |

Typical Workflow

1. Use weather_geocode to find coordinates for a city name
2. Use weather_current, weather_forecast, or weather_daily with those coordinates

The LLM will chain these tools automatically — just ask for the weather in any city.

Data Source

All weather data is provided by Open-Meteo, which combines high-resolution weather models from multiple national weather services worldwide (DWD, NOAA, Météo-France, ECMWF, and more).