1999 Suburban~window only works in the snow!

1999 chevy suburban. Drivers side window started acting up last summer. We replaced the switch on the driver door, and ck'd all wires from switch to where it goes into body.
So the window has not worked since last summer.
We were in Tahoe, in the snow and now the window works. Worked all 3 days!
We get back over the hill back to the valley. It is back to not working!
UGHHH. How can that be.
It is affected by the extreme cold. What is up?
HELP.
Lisa