What to do if the temperature falls below 64 degrees every night? Tonight
will reach 57 degrees ... tomorrow will be 55.4. During the day reaching 91.4 degrees.
Can I do anything to keep the place warm during the night?
I'd go as far as to say start the plant at home under a CFL until it's done being a seedling, by then full summer should hit your area and the plant will have enough stamina in veg stage to withstand the cool temperature anyway even if it does hit.
