Open weather map json in Processing

owm.pde

JSONObject json; 

//options - change these! 
String location = "Falmouth,UK";
int refreshInterval = 5;

//static vars - don't change!
String weatherURL = "http://api.openweathermap.org/data/2.5/weather?units=metric&q=";
long lastRefresh = 0; 

void setup(){
    size(640, 360);
    background(0);
    textFont(createFont("Georgia", 36));
   
    getDataAndDraw(); 
}

void draw(){
  if(millis() > lastRefresh+(refreshInterval*1000)){
     getDataAndDraw(); 
  }
}

void getDataAndDraw(){
  float red_rand = random(20,255);
  background(red_rand,0,0);
  
  json = loadJSONObject(weatherURL+location);
  JSONObject weatherData = json.getJSONObject("main");
  int temp = weatherData.getInt("temp");
  textSize(30);
  text("The temperature in "+location+" is:",50,50);
  textSize(40);
  text(temp+"c",50,100); 
  
  lastRefresh = millis();
}

can't work