How to call a function every hour?

Question

I am trying to update information from a weather service on my page. The info should be updated every hour on the hour. How exactly do I go about calling a function on the hour

Answer 1

Here is what should work (JSFiddle):

function tick() {
  //get the mins of the current time
  var mins = new Date().getMinutes();
  if (mins == "00") {
    alert('Do stuff');
  }
  console.log('Tick ' + mins);
}

setInterval(tick, 1000);