If I am following your question correctly the prices quoted for seasonal rentals typically will be the same for each of those months. If you are looking for a term shorter than 3 months you will find fewer opportunities as many of the buildings that do allow seasonal rentals have minimum lease terms of that duration.
Best of luck and if I can offer anything additional please let me know.
Tom Priester e-PRO
"Results Driven Real Estate"
Keller Williams Realty