For the best weather during your Stockholm sightseeing vacation, you will want to arrive sometime between May and September. You’ll experience rather warm temperatures and plenty of sunshine. Speaking of which, you can thoroughly enjoy the midnight sun in June and July. Winter obviously brings plenty of snow for those who love winter sports, like skiing or snowmobiling. The months of November and March present the ideal mix of snow and bearable temperatures. Make sure you bring your warmest jacket in December, January, and February. And, fi you want to hunt the Northern Lights, your best chances for success would take place between late September and early April.