This would be very hard to do since each mat has different demographics. I have better months when school is in session and slower months during the summer. Mats that are close to vacationing areas will have better summer months and some mats have better summers when close to migrant worker camps.
Some stores will remain somewhat constant during the year.
You can see an increase in business during the colder months since people will wear more clothing.
If your store is close to a nudist colony then you might not have much business at all. ;o)
If it is an existing store then a water analysis is your best indicator. If it is a new store then a water analysis of a nearby competitors store would give you a rough estimate.