Friday, May 22, 2015

Cooling trend

After warm early fall, a nationwide cool-down.

Cooling trend

Nationally, last month was the 21st coolest December in the 119-year period of record, according to the National Climate Data Center, coming in at 2 degrees below Fahrenheit.

It marked the third consecutive below-normal month, and helped drag down 2013 to 37th place on the warm list.

After a September that was the seventh-warmest on record, the composite temperature for contiguous 48 states finished at 0.7 below in October, and 0.4 in November, the Climate Center reported Wednesday.

Locally, September, October, and December -- despite snowfall that was more than triple the monthly average -- all had above-normal temperatures officially in Philadelphia.

For the year, the annual temperature at Philadelphia International Airport, 56.4, made 2013 the 23rd warmest in the 140-year dataset.

But that was a 2.4-degree drop from 2012, and coolest year since 2008.

The 55.88 inches of precipitation measured officially constituted Philadelphia's third-wettest year on record. Of note, three of the six-wettest years have occurred since 2009.

The Climate Center's global temperature report is due next week.

Here is the U.S. 2013 report, and the December report is here.

Inquirer Weather Columnist
About this blog

Everyone talks about the weather, and here we write about it.

When we’re around and conditions warrant, we’ll keep you updated about what’s coming, but we will do our best always to discuss weather and climate developments in context and remind you that nothing in the atmosphere happens in a vacuum.

Tony Wood has been writing about the atmosphere for The Inquirer for 26 years.

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Tony Wood Inquirer Weather Columnist
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