I found this website...it's pretty cool.
The website uses research from bass tournaments to compile what months are best for what lures.
It's not adjusted for geographic location, so some of the lures will slip into months ahead or behind what's on the site, based on your location.
The link below goes to a list of the top 50 lures. If you click the link for the lure, it will show you the most productive months for that lure.
Keep in mind, this is based on what the pros used to catch fish, so it's still somewhat subjective...if a specific trend had pros using certain lures because they were hot, the data might be skewed.
http://www.profishingresearch.com/eShop ... _lures.asp
At the worst, it's an interesting guide to lure usage.