A while back I mentioned the changes made to the USDA climate zones. This change impacted the estimates for those of us living in the US. Here is a link to an article mentioning the changes. If you are aware of similar changes in your local areas, please let me know, as I would like to ensure functionality exists equally for all of our members.
On your profile page on our website, you will notice these changes impacted the climate zone for your area automatically. These updates were made to those of you who provided your zip code on your account. If you would like to see your new climate zone, simply update your profile with your address and zip code.
Here are the new zones with minimum temperatures (F / C). If you're really interested in the topic here is a link to the USDA website with an interactive climate zone map.