The average temperature was 47 degrees, well above the normal average of 40.9 degrees and the highest average temperature since records began being kept at the Seattle Federal Building in 1891. It was even above the average high temperature for January of 45.8 degrees.
The second-warmest January on record was 2006, when temperatures averaged 46.6 degrees
http://seattletimes.nwsource.com/html/localnews/2010954521_warmjanuary02m.html2000s warmest decade on record
The 2000-09 decade was the warmest on record, easily surpassing the previous hottest decade - the 1990s - researchers said Tuesday in a report providing fresh evidence the planet may be warming at a potentially disastrous rate. In 2009, global surface temperatures were 1.01 degree above average, which tied for the fifth warmest year on record, the National Climatic Data Center said. And that helped push the 2000-09 decade to 0.96 degree above normal, which the agency said “shattered" the 1990s record value of 0.65 degree above normal. The warmest year on record was 2005 at 1.11 degrees above normal.
http://www.waterinfo.org/node/4169