The average precipitation is approximately 12 inches which mostly occurs in the winter time. The average monthly temperature for one year is 50 to 70 degrees Fahrenheit. If you are travailing to the Tundra you'll want to bring a tent, a few blankets, warm clothes, extra clothes, flashlight, and a backpack. I'd pack some Water prof hiking boots to keep you feet dry and warm. You will need food that will keep your energy up and your body warm.