Weather and time of day affect walleye activity in winter much the same way they do at other times of the year. As you probably already know, in the summer time most walleyes feed during low light conditions. The light gathering qualities of the walleyes eyes are far superior to that of the baitfish they prey upon. Naturally the walleyes use this as an advantage and feed during the dim light periods. Likewise, during overcast days they tend to bite more than during high skies and bright sunshine.
Weather is just as much a factor as it is in the summer time.
The walleye likes to feed during stable weather and if you are planning that early ice-time walleye trip check the weather before and during your stay. Sometimes the approach of a winter storm will trigger a feeding frenzy because of the advancement of low light conditions. Fish small lakes at the beginning of the ice fishing season and move to larger lakes later in the ice fishing season. This is governed by oxygen in the water. In addition, smaller lakes freeze sooner thus extending your ice fishing season.