n8n Open-Meteo Weather Forecast for Renovation Window Decision

Check a 3-day Open-Meteo forecast and decide if your renovation can start outdoors

This n8n workflow pulls a 3-day weather forecast from the Open-Meteo API for your renovation site and automatically routes you to a “good to start” (dry) or “rain expected—reschedule” decision based on daily precipitation totals.

What this workflow does

• Runs on manual execution (you trigger it when you’re ready to plan).
• Sets your project location by defining a location name plus latitude and longitude.
• Requests a 3-day daily forecast from Open-Meteo, including precipitation totals and min/max temperatures.
• Calculates the maximum daily precipitation across the 3-day forecast window to represent the worst-case day.
• Routes the workflow outcome:
  • “Good to start” when the maximum daily precipitation is below 2 mm.
  • “Rain expected—reschedule” when it is 2 mm or more.
• Keeps the project location for context while evaluating the decision.

Use cases

• Scheduling exterior painting, siding, or plaster work with a clear rule for avoiding wet conditions.
• Renovation project planning for contractors who need a quick, repeatable Open-Meteo weather check before mobilizing teams.
• Automation engineers building lightweight decision logic in n8n—using a precipitation threshold to trigger different outcomes.

Technical details

• n8n nodes used: Manual Trigger, Set, HTTP Request, If, No Op, Sticky Note.
• API integration: Calls the Open-Meteo API for a 3-day daily forecast using your provided coordinates.
• Decision logic: Compares the computed maximum daily precipitation against a 2 mm threshold (optionally configurable).

Setup tip: Update the location name, latitude, and longitude for your renovation site. If you want a stricter or looser “dry window” check, adjust the precipitation threshold, then run the workflow to see which outcome path it follows.