Deke Arndt of NOAA’s National Climatic Data Center reports that heavy rains from Hurricane Isaac in late August fell too late–and mostly in the wrong places–to provide much relief from U.S. drought.

Deke Arndt, Chief of the Climate Monitoring Branch at the National Climatic Data Center, recaps summer climate conditions.

India's monsoon rains finally arrived in August—two months late—and vegetation conditions showed some improvement.

Imagine heat waves like the one last July coming more often & lasting longer: that’s the projection from climate models for the middle of this century based on one future emissions path.

Arctic sea ice extent fell to 1.58 million square miles on August 26, 2012. This was 27,000 square miles smaller than the previous record low of 1.61 million square miles set in 2007.

It’s a discouraging fact that drought reinforces drought, especially in the summer. The Southern Plains were in the tight grip of that feedback loop in August 2012.

The average global temperature for July 2012 was more than 1° Fahrenheit above the 20th-century average, making it the fourth warmest July since record keeping began in 1880

July 2012 wasn’t just the hottest July on record, it was the hottest month ever recorded for the contiguous United States since records began in 1895.

A series of unusually strong, long-lasting high pressure systems has parked over Greenland this summer. As many a weather forecaster has explained, high pressure generally leads to calm winds and sunny skies, both of which boost temperatures during the all-day sunshine of mid-summer at high latitudes. The conditions contributed to widespread melting of the ice sheet.

The current drought in the Southwest is not drier or longer-lasting than historic episodes documented in tree rings, but the current dry conditions stand out from the historical record by being hotter, according to Jonathan Overpeck, professor of geosciences at the University of Arizona.