I have an 1998 S70 and it is not only when the temp is low, but it is getting progressively worse. I did some troubleshooting and I found that it was the drivers side central power window switch control panel assembly. Over time the high current running through the power window switches carbonizes the contacts and eventually melts the little bead on the contact surface causing an inadequate contact. I had the problem last summer and took the switch assembly apart and cleaned the carbonized contacts for the drivers side and right rear window on this central power switch panel. The windows worked since then until now. Mainly, the mostly used ones like the driver side at toll plaza's and in my case the other one was the right rear... I'll bet the previous owner had kids and controlled the windows from the drivers side. They eventually burn up...after about 5 years of service. I am now looking for a new central power window switch control panel assembly.
Paul Lata