The weather of Gothenburg is warm and temperate. There is a great deal of rainfall in Gothenburg, even in the driest month.
Summer (June to August): Summer, which is from June to August, is the peak season to visit Gothenburg. The weather is at its absolute best. The temperature rarely goes beyond 22 degree Celsius so it is just the right amount of warm. Summer also happens to be the tourist season though, so expect huge crowds. Interestingly, it is also the time when you can see the phenomenon called “Midnight Sun” which is worth the visit.
Winters (mid-October to March): are quite cold and unless you want to do some sort of a winter activity, going in winter is not a great idea. This is basically off-season for tourists in Gothenburg. The temperatures usually drop down to -1, but there are hardly any tourists so if a quiet time is what you prefer go in winter.
So, the best time to visit Gothenburg is in the months of June to August.