Climate comparison of Uruguay to Deadhorse Alaska

According to http://wx3232.blogspot.com/ The climate of Deadhorse is listed as DFC. DFC climates are typically very cold for long periods of time in the winter and have cool mild summers.
The variability of the temperature is in stark contrast to Uruguay which enjoys mild and fairly constant temperatures.

Temperature shown along red dotted line
Precipitation at the bottom.
Northern Alaska.
 

The higher latitudes of Deadhorse contribute the most to the difference in average temperatures. Despite both locations proximity to a coast, Deadhorse also experiences far less precipitation than Uruguay. The precipitation is greater in the warmer summer months, occurring the opposite time of the year with Deadhorse being a northern hemisphere.

Uruguay
both images from:
http://cwx.prenhall.com/bookbind/pubbooks/lutgens3/medialib/abcontrol/pages/question.html 

Part of what moderates the climate of Montevideo is the location of the southern Hadley cell that creates a semipermanent high ridge over Uruguay. We can see from this image that Deadhorse is directly under a circulation cell that churns out the Polar easterly winds.

Windfinder.com shows the wind predominately blows to the East

Deadhorse vegitation is minimal and hardy, well adapted to the extreme cold conditions. The soil freezes to great depths for much of the year also limiting vegetation growth.
The average humidity in Deadhorse is still relatively high and consistent through the year because of its proximity to the Ocean.
It is likely given the number of plants that can stay green year round in Uruguay, there is more evapotranspiration contributing to the average relative humidity.