Do more homes sell in the season?

Anyone that lives in Sarasota knows that it gets busier in the winter. The snow birds and vacationers escaping the harsh winters up north come to gorgeous Sarasota this time of year.
Does the increase in the number of people in town translate into more real estate sales? Take a look at the charts below for monthly sales figures from 2003 to 2006. I searched through MLS today and pulled up the monthly sales figures. These numbers are from North Sarasota down to Nokomis including Casey Key, Bird Key, Lido Key, Longboat Key, Siesta Key and Lakewood Ranch. The numbers below are only single family homes and not condos.
Notice how the sales typically increase towards the end of the season in April. May and June usually have the most closings. Perhaps the properties were put under contract in April and closed in May or June. For more information go my Sarasota home sales history page.