National Climate Report - June 2012
Year-to-Date Temperature Evolution
This time series shows the five warmest years that the contiguous U.S. has experienced and how the year-to-date temperature evolved each month throughout those years. The time series also shows the 2012 year-to-date temperature through June, which was the warmest first half of any year on record for the lower 48. The 2012 data are still preliminary.