Greenland's climate is a tundra climate (Köppen ET) on and near the coasts and an ice cap climate (Köppen EF) in inland areas. It typically has short, cool summers and long, moderately cold winters. Due to Gulf Stream influences, Greenland's winter temperatures are very mild for its latitude. In Nuuk, the capital, average winter temperatures are only −9 °C (16 °F). In comparison, the average winter temperatures for Iqaluit, Nunavut, Canada, are around −27 °C (−17 °F). Conversely, summer temperatures are very low, with an average high around 10 °C (50 °F). This is too low to sustain trees, and the land is treeless tundra.