Weather MCP Tool for Claude Desktop

An MCP (Model Context Protocol) tool that provides real-time weather data, forecasts, and historical weather information using the OpenWeatherMap API, specifically designed for Claude Desktop.

Tutorial

For a detailed guide on setting up and using this tool, check out our comprehensive Medium tutorial: Tutorial: Using Claude Desktop with Weather MCP Tool to Access Real-Time Weather Data Worldwide

Features

• Real-time weather conditions for any location
• Weather forecasts (up to 5 days)
• Historical weather data (last 5 days)
• Air quality information
• Weather alerts and warnings
• Location search functionality

Setup

1. Ensure you have Python 3.10 or higher installed

2. Install dependencies:

pip install -r requirements.txt

3. Get an API key from OpenWeatherMap (free tier available)

   • Note: New API keys may take up to 24 hours to activate

4. Set up environment variables for API key (recommended method):

   • Create a .env file in the project directory
   • Add your API key to the file:

   OPENWEATHER_API_KEY=your_openweathermap_api_key
   

   • Add .env to your .gitignore file to prevent committing sensitive data

5. Update main.py to use the environment variable:

   # Add these imports at the top
   import os
   from dotenv import load_dotenv
   
   # Load environment variables
   load_dotenv()
   
   # Replace the API_KEY line with
   API_KEY = os.getenv("OPENWEATHER_API_KEY")
   

Integration with Claude Desktop

1. Configure your MCP settings in Claude Desktop by adding the following to your MCP configuration:

{
  "mcpServers": {
    "weather-mcp": {
      "command": "py",
      "args": ["-3.13", "C:\\Path\\To\\Your\\Weather-MCP-ClaudeDesktop\\main.py"]
    }
  }
}

2. Replace the path with the full path to your main.py file
3. Run the server using:

py -3.13 main.py

4. Keep the server running while using Claude Desktop

Available Tools

1. get_current_weather

Get real-time weather conditions for a location:

{
    "location": {
        "name": "New York",
        "country": "US",
        "lat": 40.7128,
        "lon": -74.006
    },
    "temperature": {
        "current": 25.6,
        "feels_like": 26.2,
        "min": 23.4,
        "max": 27.8
    },
    "weather_condition": {
        "main": "Clear",
        "description": "clear sky",
        "icon": "01d"
    },
    "wind": {
        "speed": 3.6,
        "deg": 220
    },
    "clouds": 5,
    "humidity": 65,
    "pressure": 1015,
    "visibility": 10000,
    "sunrise": "2025-03-16T06:12:34",
    "sunset": "2025-03-16T18:04:23",
    "timestamp": "2025-03-16T14:30:00"
}

2. get_weather_forecast

Get weather forecast for a location:

{
    "location": {