Answer by C.Plock for Current Observation feed from weather.gov forbidden (403)

I had the same problem but was using PowerShell. Here is a way to set User Agent by using HttpWebRequest.

$weather_url = "http://w1.weather.gov/xml/current_obs/KLNK.xml"$request = [System.Net.HttpWebRequest]::Create($weather_url)$request.UserAgent = " {Enter your agent} "$response = $request.GetResponse()$doc = New-Object System.Xml.XmlDocument    $doc.Load($response.GetResponseStream())$temp_f = [int] $doc.current_observation.temp_f