msubigdawg:
Cole had some good advice. I have only searched for reptiles on the west coast so am not familiar with the species and their biological preferences in your region. However, if input from others is any indications, reptiles can be found any month of the year depending on weather / temperature conditions. I would expect that in your region, any time temperatures are at or above about 60 degrees F. with some sunshine for a period of 2, 3 or more days, you could have success in finding some species.
Here in northwestern Oregon, some species can be found in all months of the year as long as temperature conditions are generally at or above 55 degrees for a few days. It is also very helpful to have some sunshine.
With only a high of about 51 today with brief periods of sunshine, I observed two species, a juvenile Sharp-tailed Snake and juvenile S. Alligator Lizard.
Richard F. Hoyer