Making a meteorology app using Node.js and OpenWeatherMap API on MacOS

This tutorial will show you how to create simple weather app using node.js and OpenWeatherMap API.

Step 1- Create an account on the site OpenWeatherMap.

To get start we need to access the OpenWeatherMap website https://home.openweathermap.org/users/sign_up and register.

Then we select API Keys to create a key, to do this we have to insert in the name field a name that will be associated with the key that is generated.

Step2- Developing the app

If you already have Node.js configured, the first thing to do is to create a directory with the name nodejs-weather and then we open terminal and type the following command (after we change the directory):

npm init

Fill the fields with the information you want and press enter.

The output will be similar to the image below:

Then we type the following command to add the packages:

npm install request -save

We create a file with the name Index.js with the following code:

let request = require(‘request’);

let apiKey = ‘YOUR KEY’;

let cidade = ‘YOUR CITY’;

let url = `http://api.openweathermap.org/data/2.5/weather?q=${cidade}&appid=${apiKey}&units=metric`

request(url, function (err, response, body) {

if(err){

console.log(‘error:’, error);

} else {

let weather = JSON.parse(body)

let dados = `Dados da temperatura para ${weather.name}:

— Temperatura : ${weather.main.temp}ºC

— Humidade : ${weather.main.humidity} % `

console.log(dados);

}

});

Note that in the line 3 and 4 you type your Api Key and the city you want.

Finally on the terminal type the following command:

node index.js

The output will look like this: