What Still Works
Three of the five highlighted attractions are indoors, including Muzeum Narodowe w Szczecinie, Morskie Centrum Nauki im. prof. Jerzego Stelm
Muzeum Centrum Dialogu Przełomy keeps the trip grounded in the city’s history and works well when the weather turns against outdoor plans.
Crowds sit at a medium level, so major sights are usually manageable without feeling empty.
What Usually Gets in the Way
Average daylight is limited by just 2.1 sunshine hours, which makes December feel compressed for sightseeing.
With 10 rainy days and temperatures near freezing at night, outdoor wandering is less rewarding than in stronger months.
September, May, and June are better alternatives if you want Szczecin to feel more complete and more pleasant on foot.