The Summit Station located at 3200m reported yesterday 0°C. As of writing all the temperatures of Wunderground's Greenland page are mostly in the two digit zone and some still close to 20°C. Kangerlussuaq had a maximum temperature of 24.2°C on Monday.

Check out this satellite view acquired yesterday by MODIS/Terra showing the great Jakobshavn glacier, the mysterious grey shaded areas and many melting ponds.