Mo i Rana's climate is usually classified as subarctic (Köppen "Dfc" bordering on "Dsc"), with long, cold winters, and short, warm summers. However it's very mild compared to Oymyakon, Russia and Verkhoyansk, Russia which are continental subarctic climates. The Norwegian Current (extension of Gulf Stream), follows the coastline of Norway all the way north. The stream has a heavy influence on the climate, helping to keep the temperatures from getting too low in the winter, despite the city being located about from the coast line. The distance from the coast, however, does give it slightly lower temperatures in the winter than towns nearer the coast. There is much precipitation due to the mountains north of town, often with much snow in winter. The weather can be very unpredictable, and change quickly. Blizzards can go on for hours, potentially creating traffic difficulties and cancelling flights. Because of Mo i Rana's latitude, summer days are very long and winter days are very short on daylight. In the winter season, the Northern Lights can be seen on the night sky. It varies in intensity, coloured from white green to deep red, and comes in different shapes, such as beams, arches and draperies.