Key points

Uses the OpenWeatherMap API to provide the location, weather state, and temperature based on the visitor’s coordinates.
Uses the Geolocation API to retrieve the visitor’s location coordinates for the OpenWeatherMap API.
The displayed temperature unit can be changed from Celsius to Fahrenheit or vice versa.
Weather data is reused if the visitor’s location coordinates haven’t changed and significant time has not yet passed.
Responsive design.

Tools used