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Blog Category: Climate records

NOAA: Contiguous U.S. Experiences Third-Hottest Summer on Record

Map showing U.S. states and relative temperature from below to above average

Warm and dry conditions continue in August; Isaac brings heavy rain to Gulf Coast and some drought relief to the Midwest

The average temperature for the contiguous U.S. during August was 74.4°F, 1.6°F above the long term average, marking the 16th warmest August on record. The warmer than average August, in combination with the hottest July and a warmer than average June, contributed to the third hottest summer on record since recordkeeping began in 1895.

The summer season's (June-August) nationally-averaged temperature was 74.4°F, 2.3°F above the 20th century average. Only the summers of 2011 (74.5°F) and 1936 (74.6°F) had higher temperatures for the Lower 48.

The August nationally-averaged precipitation total of 2.59 inches was near the long-term average. The Southwest and Southeast were wetter than average and the Northwest and the Northern Plains were drier than average. As of August 28th, according to the U.S. Drought Monitor, nearly 63% of the contiguous U.S. continued to experience drought conditions. 

August climate highlights:

  • Higher-than-average temperatures occurred across much of the West. Much of the Northeast was also warmer than average, where five states from Maine to Delaware had monthly temperatures among its ten warmest.
  • Drier-than-average conditions stretched from the Pacific Northwest, through the Rockies, and into the Upper Midwest. 
  • Hurricane Isaac made landfall along Louisiana's coast on August 28th with maximum sustained winds of 80 mph. The major impacts from the hurricane were storm surge along the Gulf Coast and heavy rainfall, both of which were driven partially by the storm's slow motion and large size.
  • Over 3.6 million acres burned nationwide, mostly across the West. The acreage burned was nearly twice the August average and the most for the month in the 12-year period record.

Full release for August and June-August climate highlights

NOAA: U.S. Records Warmest March; More than 15,000 Warm Temperature Records Broken

U.S. map showing locations of record-breaking temps

First quarter of 2012 also warmest on record; early March tornado outbreak is year's first "billion dollar disaster"

According to National Oceanic and Atmospheric Administration (NOAA) scientists, record- and near-record breaking temperatures dominated the eastern two-thirds of the nation and contributed to the warmest March on record for the contiguous United States, a record that dates back to 1895. Over 15,000 records were broken as March 2012 became the warmest on record.

The average temperature of 51.1 degrees F was 8.6 degrees above the 20th century average for March and 0.5 degrees F warmer than the previous warmest March in 1910. Of the more than 1,400 months (or more than 116 years) that have passed since the U.S. climate record began, only one month, January 2006, has seen a larger departure from its average temperature than March 2012.

This monthly analysis from NOAA's National Climatic Data Center is part of the suite of climate services NOAA provides government, business and community leaders.  Full release  |  NOAA visuaolization