Querying Temperatures through the WUnderground API with PowerShell

queryweatherdata.ps1

#Get weather data from wunderground
#Just an example
#scriptjunkie 2017
#Public domain
#https://www.wunderground.com/history/airport/KJAC/2017/1/24/DailyHistory.html?req_city=Jackson+Hole&req_state=WY&req_statename=Wyoming&reqdb.zip=83012&reqdb.magic=5&reqdb.wmo=99999&format=1

$startdate = Get-Date
$highs = New-Object System.Collections.ArrayList
$lows = New-Object System.Collections.ArrayList
0..365 | %{
  $d = $startdate.AddDays(-$_)
  $y = $d.Year
  $m = $d.Month
  if(($m -gt 4) -and ($m -lt 9)){ # this was just my filter to only show temperatures from the skiing season
    break
  }
  $dd = $d.Day
  "$y/$m/$dd"
  $c = (Invoke-RestMethod "https://www.wunderground.com/history/airport/KJAC/$y/$m/$dd/DailyHistory.html?req_city=Jackson+Hole&req_state=WY&req_statename=Wyoming&reqdb.zip=83012&reqdb.magic=5&reqdb.wmo=99999&format=1").Substring(1) | ConvertFrom-Csv
  $low = 1000
  $high = -1000
  $c | %{
    $t = [double]$_.TemperatureF
    if ($t -lt $low) {
      $low = $t
    }
    if ($t -gt $high) {
      $high = $t
    }
  }
  $highs.Add($high)
  $lows.Add($low)
}