I had the slipping on mine regardless of temp, but it slipped longer when the temps were in the teens than it did when they were in the 40's. I'd guess 10-15 seconds in the teens and 5-10 seconds in the 40's. But I'm confident that if you have a tranny with the problem, you'll notice it regardless of climate. It was unmistakeable on my car. You step on the gas, and the engine revs, but the car doesn't move. If you've ever had a manual transmission with a badly slipping clutch, you'll know the feeling. I had a clutch go out on one of my motorcycles once that felt very similar.