The chlorine puck dissolves because of the water flowing through the canister, so if you didn't adjust the dial to a lower setting, the chlorine puck should last just as long as summer, albeit the cooler water temps will slow it down just a little bit.

I agree with Carl that it's possible (and very likely) that your canister is clogged and fortunately with the colder water temps, there's very little algae activity to worry about. You should get this checked before it starts to warm up.