The average temperatures of the first half of 2006 were the highest ever recorded for the continental United States, scientists announced today.
Temperatures for January through June were 3.4 degrees Fahrenheit above the 20th-century average.
Texas, Oklahoma, Kansas, Nebraska and Missouri experienced record warmth for the period, while
no state experienced cooler-than-average temperatures, reported scientists from NOAA's National Climatic Data Center in Asheville, N.C.
Scientists have previously said that 2005 was the warmest year on record for the entire globe.
from:
http://www.livescience.com/environment/060714_record_heat.html