National Overview - April 2012
Ten Warmest 12-month consecutive periods of the CONUS Record

« National Overview - April 2012


Ten Warmest 12-month consecutive periods of the CONUS Record

These are the warmest 12-month periods on record for the contiguous United States. The record begins January 1895.

Rank Consecutive 12-month Period Temperature Departure
(from 20th Century Average)
Warmest May 2011 – April 2012* +2.80°F
2nd Warmest November 1999 – October 2000 +2.70°F
3rd Warmest October 1999 – September 2000 +2.65°F
4th Warmest April 2011 – March 2012* +2.61°F
5th Warmest September 2005 – August 2006 +2.56°F
6th Warmest August 2005 – July 2006 +2.54°F
  September 1999 – August 2000 +2.54°F
8th Warmest July 1999 – June 2000 +2.51°F
9th Warmest June 1999 – May 2000 +2.46°F
  August 1999 – July 2000 +2.46°F

* – Preliminary Data