I don't get overly excited about add-on browser extensions but what Tim has developed here is truly something to get excited about.

Everything you need to be your own "meteorologist" is right here in one seamless, clickable thumbnail on your toolbar.

I enjoy the visual appeal of the current temperature as it's non intrusive while I'm performing tasks and by simply mousing over the temperature it will display a brief weather condition (cloudy, snow, rain, etc.) the real feel temperature, and a timestamp which is updated frequently.

Going Weather Pro is very inexpensive or take the free one out for a test drive to see what I mean by how awesome this is. Thanks Tim!