New USDA Hardiness Zone Map
After using the same one for over 20 years, the USDA has unveiled their new map. Instead of data from 1974 to 1986, this includes winter weather temperatures from 1976 to 2005:
You may notice some changes to your zone designation. The site is much clearer, you can do a zip code look-up that's USDA official and all you need to do is click on your state to get an up-close view !