Sending multiple numbers to Arduino via Serial

Processing Electronics (Arduino, etc.)
4

sorry, my idea was ( UNTESTED )

final int LINE_FEED=10;


void draw() {
  if ( millis() > time_to_fetch ) {
    loadData();
    String send = temp1 + ',' + humidity1 + ',' + speed1 +  ',' + temp2 + ',' + humidity2 + ',' + speed2 + ','  + increment1 + ',' ;
    myPort.write(send + LINE_FEED);
    println(send);
  }
}

so you send one line every 10 sec
and not 60 lines per sec

for better understanding put in your code a

println(increment1);