Because of Trondheim's coastal climate and weather changes, we suggest that you bring rainproof clothing and waterproof shoes or boots.
If you are in Norway in the winter, it is best to wear woollen clothing. You should bring a warm jacket and a good pair of snow boots with a thick sole that will keep you on your feet despite icy streets. "Isbrodder" or crampons that easily slip on and off your shoes are well worth the investment. You can buy these in most shoe shops in Trondheim.
Also remember to bring some sports clothing if you want to follow Norwegians in their leisure time activities and weekend trips.
For updated weather forecast check yr.no