🟢 Beginner’s Guide to n8n Automation

Build a “Weather Data Every Minute” Workflow (with & without Docker)

Automation can save hours of manual work—but coding full-blown services is daunting if you’re new to development.
n8n changes that by letting you drag, drop, and connect nodes to create workflows visually.

In this guide you’ll learn:

• What n8n is and why it’s useful

• How to install n8n two ways: with Docker and without Docker

• How to import and run a sample workflow that generates random weather data every minute

• How each node in the workflow works

• Extra ideas to help you create your own automations

Let’s get started!

---

1️⃣ What Is n8n?

n8n (pronounced “n-eight-n”) is an open-source automation platform.
Think of it like a programmable version of tools such as Zapier or IFTTT:

• Visual builder – create flows by connecting nodes instead of writing boilerplate code.

• Over 350 ready-made nodes – HTTP requests, Slack, Google Sheets, Databases, GitHub, and many more.

• Self-hosted or cloud – run on your own server for full control.

---

2️⃣ Install n8n

You can run n8n either inside a Docker container (simple and portable) or directly on your system (no Docker needed).
Pick the method you prefer.

A. Install with Docker (Recommended)

1. Create a folder for n8n:

    mkdir n8n && cd n8n
   

2. docker-compose.yml:

    version: "3.9"
    services:
      n8n:
        image: n8nio/n8n
        ports:
          - "5678:5678"
        environment:
          - N8N_BASIC_AUTH_ACTIVE=true
          - N8N_BASIC_AUTH_USER=admin
          - N8N_BASIC_AUTH_PASSWORD=strongpassword
          - TZ=Asia/Kolkata
        volumes:
          - ./n8n_data:/home/node/.n8n
   

3. Start it:

    docker compose up -d
   

4. Visit http://<your-server-ip>:5678 and log in with admin / strongpassword.

---

B. Install without Docker (Native Node.js)

If you’d rather skip Docker:

# Update packages
sudo apt update && sudo apt upgrade -y

# Install Node.js 18 or newer
curl -fsSL https://deb.nodesource.com/setup_18.x | sudo -E bash -
sudo apt install -y nodejs build-essential

# Install n8n globally
sudo npm install -g n8n

Optional but recommended security:

export N8N_BASIC_AUTH_ACTIVE=true
export N8N_BASIC_AUTH_USER=admin
export N8N_BASIC_AUTH_PASSWORD=strongpassword

Run:

n8n

Open http://<your-server-ip>:5678 in a browser.

✅ Tip: For production, create a systemd service so n8n starts automatically on reboot.

---

3️⃣ Import the Weather Workflow

Download or copy the following JSON into a file called weather-workflow.json:

{
  "name": "Weather Data Every Minute (Enhanced)",
  "nodes": [
    {
      "parameters": {
        "triggerTimes": [
          {
            "mode": "everyMinute"
          }
        ]
      },
      "name": "Cron",
      "type": "n8n-nodes-base.cron",
      "typeVersion": 1,
      "position": [150, 300]
    },
    {
      "parameters": {
        "values": {
          "string": [
            {
              "name": "city",
              "value": "London"
            }
          ]
        },
        "options": {}
      },
      "name": "Set City",
      "type": "n8n-nodes-base.set",
      "typeVersion": 1,
      "position": [350, 300]
    },
    {
      "parameters": {
        "functionCode": "const conditions = ['Sunny', 'Cloudy', 'Rainy', 'Windy', 'Snowy'];\nreturn [{\n  json: {\n    city: $json.city,\n    temperature: Math.floor(Math.random() * 16) + 15, // 15-30\n    condition: conditions[Math.floor(Math.random() * conditions.length)],\n    humidity: Math.floor(Math.random() * 41) + 40, // 40-80\n    wind: Math.floor(Math.random() * 21) + 5 // 5-25\n  }\n}];"
      },
      "name": "Random Weather",
      "type": "n8n-nodes-base.function",
      "typeVersion": 1,
      "position": [550, 300]
    },
    {
      "parameters": {
        "value": "={{$now}}",
        "custom": true,
        "toFormat": "yyyy-MM-dd HH:mm:ss",
        "options": {}
      },
      "name": "Date & Time",
      "type": "n8n-nodes-base.dateTime",
      "typeVersion": 1,
      "position": [750, 300]
    },
    {
      "parameters": {
        "responseMode": "lastNode",
        "options": {}
      },
      "name": "Respond to Webhook",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1,
      "position": [950, 300]
    }
  ],
  "connections": {
    "Cron": {
      "main": [
        [
          {
            "node": "Set City",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Set City": {
      "main": [
        [
          {
            "node": "Random Weather",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Random Weather": {
      "main": [
        [
          {
            "node": "Date & Time",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Date & Time": {
      "main": [
        [
          {
            "node": "Respond to Webhook",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "active": false
}

1. Go to the n8n web interface.

2. Click Workflows → Import from File.

3. Select the file and save.

---

4️⃣ Understand the Nodes

Here’s what each node in Weather Data Every Minute (Enhanced) does:

When active, every minute this workflow generates output similar to:

{
  "city": "London",
  "temperature": 24,
  "condition": "Sunny",
  "humidity": 65,
  "wind": 14,
  "date": "2025-09-17 22:30:00"
}

---

5️⃣ Test It

1. Activate the workflow (toggle in the top right).

2. Use curl or a browser to hit the test URL shown in the “Respond to Webhook” node:

    curl http://<your-ip>:5678/webhook/<your-path>
   

3. You’ll see fresh weather data each time you call it.

---

6️⃣ Fun Extensions

This simple example is just the start.
Here are some beginner-friendly ideas:

• Log to a Database – Add a PostgreSQL or MySQL node to store each weather record.

• Send Alerts – Add an Email or Slack node to notify if the temperature crosses a threshold.

• Google Sheets Dashboard – Append each new data point to a sheet for easy charts.

• Real API Calls – Replace the Random Weather function with an HTTP Request node calling a real API such as OpenWeatherMap.

---

7️⃣ Key Takeaways for Beginners

• Visual First – You don’t need to be a developer to start; drag-and-drop gets you far.

• Two Easy Installs – Docker for convenience, Node.js if you prefer native.

• Reusable – The same workflow can run locally, in the cloud, or on a Raspberry Pi.