People in Wellington do not mess around when it comes to the commute. Between wild wind and regular rain people are ready for anything. Which is really funny to see on a calm and sunny day like today.
If you are worried people can't see your vest because of the because you're wearing a backpack, here is a great solution. Just make sure to get that XXL vest if you've got a bigger pack.
Just because its not raining doesn't mean you shouldn't have your pack cover on just in case you get hit with a sprinkler. Double points if you color match to your ankle straps.
Just remember to always be prepared.