Please excuse another California-centric post, but if you’re in the Golden State and like to geek out on keeping track of your chill hours here’s a handy tool bought to you by UC Davis: Cumulative Chilling Hours. Each year this page keeps track of chill hours between November 1 through end of February. If you know of a similar resource for other states/countries leave a link in the comments.
As cool (so to speak) as this tool is, what constitutes a chill hour and what kinds of fruit will grow in a particular climate is a complex question. For more on this debate see a provocative article on the Dave Wilson Nursery website, “Chill Out“.