http://arctic.atmos.uiuc.edu/cryosphere/timeseries.anom.1979-2008

Ice area is a better gauge (than extent) of the length of the melt season, because it is affected less by the wind blowing the ice edge around. As you can see, after  September 8, formation of new ice became dominant in the Arctic. All of the area graphs show the same thing.

http://www.ijis.iarc.uaf.edu/seaice/extent/AMSRE_Sea_Ice_Area.png

http://arctic-roos.org/observations/satellite-data/sea-ice/observation_images/ssmi1_ice_area.png

Joe Romm pictures the Arctic melting at -20ºC, but that only occurs in the world of global climate disruption.

http://psc.apl.washington.edu/northpole/POPS13_atmos_recent.html

09/20/1800Z    83.575°N    3.497°E   -16.2°C   1010.8mb
09/20/1700Z    83.577°N    3.494°E   -16.1°C   1011.5mb
09/20/1300Z    83.582°N    3.478°E   -15.2°C   1010.1mb
09/20/1200Z    83.584°N    3.469°E   -14.9°C   1009.6mb
09/20/1100Z    83.585°N    3.459°E   -15.7°C   1009.3mb
09/20/1000Z    83.586°N    3.447°E   -16.6°C   1009.5mb
09/20/0900Z    83.588°N    3.437°E   -17.1°C   1009.1mb
09/20/0800Z    83.589°N    3.428°E   -17.6°C   1008.8mb
09/20/0300Z    83.603°N    3.431°E   -20.1°C   1007.0mb
09/20/0200Z    83.608°N    3.432°E   -21.9°C   1007.3mb
09/20/0100Z    83.613°N    3.429°E   -19.5°C   1008.0mb
09/20/0000Z    83.618°N    3.420°E   -17.5°C   1009.2mb
09/19/2300Z    83.623°N    3.409°E   -15.0°C   1009.7mb