Generally speaking it is pretty temperant here so I do not see many wild swings in temperature. However sometimes it is a bit tricky keeping the temps in line. Summer is a bitch since I live near the coast therefore I do not have AC in the house. Winter I run the central heat; summer (and most all year) I vent using a 6" Vortex 449 CFM on a rheostat (dimmer) switch thru the ceiling after neutralizing smelly air with a 8x20 activated carbon filter.

For the little cuts, I place a heating pad underneath the tray/humidity dome to keep the temps a bit higher than room temp. That is pretty much it, although I bought a couple of muffin fans off eBay and use them to vent the individual growing compartments into the ceiling area of the main closet where the Vortex fan/carbon filter empty the room. Fresh air is passive thru an open window/shadow box set up like in Cervantes' book.

I also bought one of those crappy little under desk heaters for around 10 bucks and plan to use it to keep the room temp from fluctuating too much as it gets colder... no need to run central heat all the time with that heater thing on hand.