I'm going to be storing my tools out there and I'm not sure if it is OK to leave them out in the cold in between work sessions which realistically can only happen on the weekends with my job and everything.
My father stored nearly all of his tools in his workshop year around. Since it wasn't safe for him to run any heat in the shop (dust, chemicals etc), he often used the tools in below zero temperatures (tough guy). I've stored many of my tools in the same below freezing temps for years. As far as I'm concerned, heat is really more of a comfort and safety thing for the person using the tools, not for the tools themselves. I doubt your table saw is going to call you Scrooge for not giving it another piece of coal.
My biggest problems I encountered wasn't the cold, but the moisture. Electrical equipment sometimes attracted moisture inside as the circuits heated up. If you think ahead, leave the tool inside a warm room until it warms up or bring the work to where the tool is. The other problem is calibrated equipment. The cold causes materials to contract throwing off the calibration. I don't own anything so sensitive that they have to be kept at room temp, but you might.