In the last 7 days i have reached the 2000+ uv/day on one of my websites and yet i have an average of 4$ on adsense. Will adsense ever recover for that drop in december ?
I think it really depends on the subject of your website and how much the advertisers are willing to pay before they get a customer.
You could have a million visitors but if no one wants to advertise in your niche you are never going to get any advertising $$.
You should also consider your adsense setup and the colors you're using. Will your advertisements catch your visitor's ads? Does your website look overly saturated with ads?
It is always wise to review you ad content from time to time so make sure that they are relevant to your niche
If most of those uniques are not from advertisement, You are leaving money on the table and are the ideal candidate for buying the HowToMakeMoneyWithGoogle guide