Building a Dynamic Weather App with Vanilla JavaScript
Build a polished, responsive weather dashboard with Vanilla JavaScript, the OpenWeatherMap API, dynamic rendering, geolocation, unit switching, weather themes, and a five-day forecast.
WeatherNow is a practical JavaScript project built around one realistic problem: take live weather data and turn it into a useful interface.
Prerequisites
You should already be comfortable with HTML, CSS, JavaScript objects and arrays, DOM manipulation, event listeners, template literals, and basic async/await. You should also know how to run a local web project.
Why this project?
A weather app is small enough to understand but rich enough to exercise real frontend patterns. A single search can involve user input, validation, two API requests, asynchronous state, JSON data, DOM rendering, conditional logic, and visual changes.
The course builds those pieces in application order so each step has an observable result and the finished code has a clear data flow.
Course structure
Each module has an introduction explaining its role in the application. Implementation lessons identify the exact file and code section to edit, show the focused change, explain why it is needed, and finish with a concrete test and checkpoint.
End result
By the end, WeatherNow will search for cities, display current conditions and a five-day forecast, handle loading and errors, use the browser’s location, switch between Celsius and Fahrenheit, remember the unit preference, and change its visual state according to live weather conditions.