n8n Workflow: Receive Weather Information for Any City

This n8n workflow provides a simple API endpoint to retrieve current weather information for a specified city using the OpenWeatherMap API.

It allows you to easily integrate real-time weather data into other applications or services by making a simple HTTP request.

What it does

1. Listens for incoming requests: A Webhook node acts as an API endpoint, waiting for an HTTP POST request.
2. Retrieves City Name: It expects the city name to be provided in the body of the incoming POST request.
3. Fetches Weather Data: It uses the OpenWeatherMap node to query the current weather conditions for the specified city.
4. Formats Output: The "Edit Fields" (Set) node then processes the raw weather data, extracting and formatting key information like temperature, humidity, and weather description into a cleaner, more readable JSON output.
5. Sends Response: The workflow responds to the original webhook request with the formatted weather information.

Prerequisites/Requirements

• n8n instance: A running n8n instance (self-hosted or cloud).
• OpenWeatherMap API Key: An API key from OpenWeatherMap is required to fetch weather data. You will need to create a credential in n8n for this.

Setup/Usage

1. Import the workflow:
   • Copy the provided JSON code.
   • In your n8n instance, click "New" in the workflows section.
   • Click the three dots ... next to the workflow name and select "Import from JSON".
   • Paste the JSON code and click "Import".
2. Configure OpenWeatherMap Credentials:
   • Locate the "OpenWeatherMap" node in the workflow.
   • Click on the "Credential" field and select "Create New".
   • Choose "OpenWeatherMap API" as the credential type.
   • Enter your OpenWeatherMap API Key.
   • Give the credential a descriptive name (e.g., "My OpenWeatherMap API Key") and save it.
3. Activate the workflow:
   • Ensure the workflow is active by toggling the "Active" switch in the top right corner of the n8n editor.
4. Get the Webhook URL:
   • Click on the "Webhook" node.
   • Copy the "Webhook URL" displayed in the node's settings.
5. Make a request:
   • You can now make a POST request to the copied Webhook URL.
   • The request body should be a JSON object containing the city name. For example:

     {
         "city": "London"
     }
     

   • Example using curl:

     curl -X POST -H "Content-Type: application/json" -d '{"city": "London"}' YOUR_WEBHOOK_URL
     

   • Replace YOUR_WEBHOOK_URL with the actual URL copied from the Webhook node.

The workflow will respond with the current weather information for the specified city.