Repeating OpenWeather API in node.js with database

weather.js

let cron = require('node-schedule'), //npm install these or you're gna hae a bad time
	loki = require('lokijs'), //loki is db with persistance coz saves json as a file
	fetch = require('node-fetch') //browser fetch in node

let locations = ['London','Newcastle','Glasgow'] //or export an arr of locs in another file and require('./locations.js')

let openWeatherKey = '123456789abcdefghijk' //not a reel api key

let openWeatherUrl = (location) => {
	return 'http://api.openweathermap.org/data/2.5/weather?q=' + location + ',uk&appid=' + openWeatherKey //change uk if you're grabbing data from elsewhere durr
}
console.log('number of locations: ', locations.length) 


cron.scheduleJob('00 */2 * * *', () => { //run every 2 hours (bc there are 2k locations in total, takes 45m to run)
	//    cron:s? m  h  dm m dw

	//init db
	let db = new loki('weather.loki', {
		autoload: true,
		autosave: true,
		autoloadCallback: () => {
			//db ready do stuff


			for (let i = 0; i < locations.length; ++i) {

				setTimeout(() => { // max 1 request per second

					fetch(openWeatherUrl(locations[i])).then(res => {
						return res.json()
					}).then(weather => {
						let weatherColl = db.getCollection('weather') //loading n saving the db in the loop bc in my app I can load this from web - I want the data persisted after every req
						if (weatherColl == null) {
							weatherColl = db.addCollection('weather')
						}
						let newDate = new Date()
						try {
							weatherColl.insert({ date: newDate, weatherData: weather })
							db.saveDatabase()
							console.log('inserted weather #' + i + ' total: ' + weatherColl.count())
						} catch (err) {
							console.log('err', err)
						}

						let temp = weather.main.temp + '\xB0F' //degree synmbol
						console.log(' Time: ', newDate)

					}).catch(err => { //catch fetch errs so we don't kill tha script, or just use forever
						console.log('err:', err)
					})
				}, i * 1000) //prob hacky but stfu, works for 2.7k locations idk
			} 
			db.close()
		}
	})
})