High-latitude climates have long periods of darkness as well as long periods of day light. Higher latitudes have greater variation in sunlight than lower latitudes. However, these climates are cold because the sun's rays are not as intense as in the lower latitudes. Although the cold ocean waters may moderate the coastal areas, the interiors are also cold during the winter because they lose heat more rapidly. The interiors have the highest range of temperature of any climate type. The high latitude has two seasons, the polar days and polar night. The high latitude climates have four main groups. Subarctic climate, Tundra climate, Ice Cap climate, and Highland climate.