http://www.remss.com/msu/msu_data_monthly.html

At present, no one other than GISS claims 2010 is the hottest year ever. The Met Office has announced their intentions to “adjust” their data in order to make 2010 (possibly) #1, but it hasn’t happened yet.

The other half of the story is that the main reason temperatures were recorded high during January-April was because of the record low Arctic Oscillation. The same weather pattern which made much of the Northern Hemisphere very cold, also brought balmy -21C weather to the Canadian Arctic – as opposed to the normal -25C weather.

-21C isn’t “hot” by most people’s definitions.