Scriptable JS for displaying 7-day forecast from DarkSky

Forecast.js

// Variables used by Scriptable.
// These must be at the very top of the file. Do not edit.
// icon-color: cyan; icon-glyph: magic;

let place = await Location.current() // Use Current Location
let json = await getWeather(place)
// Deserialize
let currentTemp = json.currently.apparentTemperature
let summary = json.minutely.summary
let currentMessage = "It's currently " + currentTemp + " degrees. " + summary
let dailies = json.daily.data
let table = new UITable()
// Add one row per day by iterating over the array of daily data
dailies.forEach(function (day, index) {
  let row = new UITableRow()
  if (index === 0) {
    var date = "Today"
  } else if (index === 1) {
    var date = "Tomorrow"
  } else {
    var date = localDay(day.time)
  }
  let max = Math.round(day.apparentTemperatureMax).toString()
  let min = Math.round(day.apparentTemperatureMin).toString()
  let probability = Math.round(day.precipProbability * 100)
  let icon = day.icon
  // Table layout and data binding
  let dateCell = row.addText(date)
  let tempCell = row.addText(max + " | " + min)
  let iconCell = row.addImage(iconImage(icon))
  if (probability > 0) {
    iconCell = row.addText(probability.toString() + "%")
  } else {
    iconCell = row.addText("     ")
  }
  dateCell.widthWeight = 30
  tempCell.widthWeight = 15
  iconCell.widthWeight = 20
  row.height = 60
  row.cellSpacing = 5
  table.addRow(row)
})
// Display or Speak results
if (config.runsWithSiri) {
  QuickLook.present(table)
  Speech.speak(currentMessage)
} else {
  QuickLook.present(table)
}

async function getWeather(place) {
  let keys = devKey()
  const site = "https://api.darksky.net/forecast/"
  let url = site + keys + "/" + place.latitude + "," + place.longitude
  let req = new Request(url)
  let json = await req.loadJSON()
  return json
}

function devKey() {
  let fileManager = FileManager.iCloud()
  let dir = fileManager.documentsDirectory()
  let file = fileManager.joinPath(dir, "DarkSky_Key.txt")
  return fileManager.readString(file)
}

function localDay(unixTime) {

  const weekday = [
    "Sunday",
    "Monday",
    "Tuesday",
    "Wednesday",
    "Thursday",
    "Friday",
    "Saturday"
  ]
  let d = new Date(0); // Date(0) sets d to Unix Epoch
  d.setUTCSeconds(unixTime)
  return weekday[d.getDay()]
}

// Hat Tip to Adam Whitcroft of Climacons for providing svg versions of the PNG files
// http://adamwhitcroft.com/climacons/
function iconImage(icon) {
  let fileManager = FileManager.iCloud()
  let dir = fileManager.documentsDirectory()
  let path = "Icons/" + icon + ".png"
  let file = fileManager.joinPath(dir, path)
  return fileManager.readImage(file)
}