Send multi-city weather forecasts with AI-enhanced formatting from OpenWeatherMap to Gmail

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

This workflow automates weather forecast delivery by collecting city names, fetching 5 day forecasts from OpenWeatherMap, and generating professionally formatted HTML emails using GPT 4. The AI cre...

Best for

Personal Productivity automation workflows
Multimodal AI automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.code, n8n-nodes-base.gmail, n8n-nodes-base.openweathermap, n8n-nodes-base.set, n8n-nodes-base.merge, n8n-nodes-base.httprequest, n8n-nodes-base.formtrigger, @n8n/n8n-nodes-langchain.openai

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Sridevi Edupuganti.

Original n8n.io source

1.1 Workflow description

Title: Send multi-city weather forecasts with AI-enhanced formatting from OpenWeatherMap to Gmail
Workflow name: Send multi-city weather forecasts with AI-enhanced formatting from OpenWeatherMap to Gmail

Overview

This workflow automates weather forecast delivery by collecting city names, fetching 5-day forecasts from OpenWeatherMap, and generating professionally formatted HTML emails using GPT-4. The AI creates condition-based color-coded reports with safety precautions and sends them via Gmail.

How It Works

A form trigger collects up to three city names, which are geocoded via OpenWeatherMap API to retrieve coordinates and 5-day forecasts.

JavaScript nodes process the raw weather data into daily summaries, calculating temperature ranges, precipitation levels, wind speeds, and dominant weather conditions.

GPT-4 then generates professionally formatted HTML emails with condition-based color coding: The AI intelligently adds contextual safety warnings for heavy rain, extreme heat, high winds, and thunderstorms.

A validation node ensures proper JSON formatting before Gmail sends the final briefing.

Use Cases

• Field ops & construction crew briefings • Travel planning and itinerary preparation • Outdoor event planning & coordination • Logistics and transportation route planning • Real estate property viewing scheduling • Sports and recreational activity planning

Setup Requirements

OpenWeatherMap API credentials
OpenAI API key
Gmail OAuth2 authentication

Need Help?

Join the Discord or ask in the Forum! README file available at https://tinyurl.com/MulticityWeatherForecast

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - JS - Validate JSON from LLM

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 2 - GMAIL - Send Weather Briefing

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 3 - JS - Bundle Cities for LLM

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 4 - JS - Build Daily Summaries (5 days)

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 5 - OpenWeatherMap (OWM) - 5 Day Forecast (by City)

Type / Role: n8n-nodes-base.openWeatherMap - openWeatherMap
Config choices: Version 1

Block 6 - JS - Pick Lat/Lon

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 7 - SET - Carry Asked City to Forecast

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 8 - MERGE - Pair Cities

Type / Role: n8n-nodes-base.merge - merge
Config choices: Version 3.2

Block 9 - HTTP - OWM Geocoding

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 10 - JS - Normalize City Inputs

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 11 - TRIGGER - Input City Names

Type / Role: n8n-nodes-base.formTrigger - formTrigger
Config choices: Version 2.3

Block 12 - LLM - AI Weather Briefing Composer

Type / Role: @n8n/n8n-nodes-langchain.openAi - openAi
Config choices: Version 1.8

Block 13 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 14 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 15 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 16 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 17 - Sticky Note4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 18 - Sticky Note5

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 19 - Sticky Note6

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 20 - Sticky Note7

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Send multi-city weather forecasts with AI-enhanced formatting from OpenWeatherMap to Gmail
Complexity	advanced
Nodes	20
Categories	Personal Productivity, Multimodal AI
Author	Sridevi Edupuganti
Published	19 Oct 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/9909/9909.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Personal Productivity workflows Multimodal AI workflows

Frequently asked questions

What does Send multi-city weather forecasts with AI-enhanced formatting from OpenWeatherMap to Gmail do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Personal Productivity, Multimodal AI use case.

Sridevi Edupuganti

10 workflows

Nodes

n8n-nodes-base.code n8n-nodes-base.gmail n8n-nodes-base.openweathermap n8n-nodes-base.set n8n-nodes-base.merge n8n-nodes-base.httprequest n8n-nodes-base.formtrigger @n8n/n8n-nodes-langchain.openai

Complexity

advanced

Published 19 Oct 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/9909/9909.json

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Send multi-city weather forecasts with AI-enhanced formatting from OpenWeatherMap to Gmail

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Overview

How It Works

Use Cases

Setup Requirements

Need Help?

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - JS - Validate JSON from LLM

Block 2 - GMAIL - Send Weather Briefing

Block 3 - JS - Bundle Cities for LLM

Block 4 - JS - Build Daily Summaries (5 days)

Block 5 - OpenWeatherMap (OWM) - 5 Day Forecast (by City)

Block 6 - JS - Pick Lat/Lon

Block 7 - SET - Carry Asked City to Forecast

Block 8 - MERGE - Pair Cities

Block 9 - HTTP - OWM Geocoding

Block 10 - JS - Normalize City Inputs

Block 11 - TRIGGER - Input City Names

Block 12 - LLM - AI Weather Briefing Composer

Block 13 - Sticky Note

Block 14 - Sticky Note1

Block 15 - Sticky Note2

Block 16 - Sticky Note3

Block 17 - Sticky Note4

Block 18 - Sticky Note5

Block 19 - Sticky Note6

Block 20 - Sticky Note7

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions