Bing Image Search The Arctic tundra is found almost entirely in the Northern Hemisphere in places such as, Russia, Alaska, Canada, Greenland, and Scandinavia If its too cold, the ice caps don't melt enough to allow vegetation. If its a bit warmer, trees are able to send roots deep enough to root and grow. In the arctic tundra, there are two seasons: winter and summer. In the summer, the sun is present almost 24 hours a day and only warms the tundra up about 3°C to 12°C. In the there are several weeks where the sun never rises and temperatures drop to extremely cold levels average around -28°C but can dip to -70°C. Steward