Send multi-city weather forecasts with AI-enhanced formatting from OpenWeatherMap to Gmail
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
Nodes used (8)
- Code
n8n-nodes-base.code - Gmail
n8n-nodes-base.gmail - OpenWeatherMap
n8n-nodes-base.openWeatherMap - Edit Fields (Set)
n8n-nodes-base.set - Merge
n8n-nodes-base.merge - HTTP Request
n8n-nodes-base.httpRequest - n8n Form Trigger
n8n-nodes-base.formTrigger - OpenAI
@n8n/n8n-nodes-langchain.openAi
What it does
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 1) OpenWeatherMap API credentials 2) OpenAI API key 3) Gmail OAuth2 authentication Need Help? Join the Discord or ask in the Forum! README file available at https://tinyurl.com/MulticityWeatherForecast