June 2012 was the globe's 4th warmest June on record, according to the National Oceanic and Atmospheric Administration's
National Climatic Data Center (NCDC). NASA rated May 2012 the 3rd warmest on record. June 2012 global land temperatures were the warmest on record; this makes three months in a row--April, May, and June--in which record-high monthly land temperature records were set. Global ocean temperatures were the 10th warmest on record. June 2012 was the 328th consecutive month with global temperatures warmer than the 20th century average; the last time global temperatures were below average was February 1985. We've now had three consecutive top-five warmest months on record; April 2012 was the 5th warmest April on record, and May 2012 was the 2nd warmest May on record. The increase in global temperatures relative to average, compared to March 2012 (16th warmest March on record) is due, in part, to warming waters in the Eastern Pacific, where a La Niña event ended in April, and borderline El Niño conditions now exist. Global satellite-measured temperatures in June for the lowest 8 km of the atmosphere were 4th or 3rd warmest in the 34-year record, according to
Remote Sensing Systems and the
University of Alabama Huntsville (UAH). Northern Hemisphere snow cover extent during June 2012 was the
smallest in the 46-year period of record. Wunderground's weather historian, Christopher C. Burt, has a comprehensive post on the notable weather events of June in his
June 2012 Global Weather Extremes Summary. Notably:
http://www.wunderground.com/blog/JeffMasters/article.html?entrynum=2158