Once in the 30s and below they are a bit harder to roll over but a good starter with a good battery shouldn't have any problems spinning an engine. The main thing I notice is they need to warm up a bit before I take off. I let them run at about 4K rpm for about a minute then they are fine the rest of the day. If it's a new engine after it has been run in it will also be easier to roll over.
From our summer 110 degree weather to our 20 degree winters the high speed needle only needs to be moved about 4 clicks to compensate for the temp difference. Other then that I almost never touch the adjustments. I watch other guys twisting the needles after every flight? If it ran good to begin with then nothing should have changed.