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In April, another cool month for U.S. despite global warmth

By Scott Dance, The Baltimore Sun

12:09 PM EDT, May 20, 2013

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April was a chilly month across the U.S., but it was still a 338th-straight month of global temperatures averaging above the 20th century mean, according to U.S. climate statistics.

The monthly global average temperature was nearly 1 degree above normal, the 13th-warmest April on record, according to the National Climatic Data Center's monthly state of the climate report. In the U.S., temperatures averaged 1.4 degrees below normal, the 23rd coolest April on record.

Some anomalies from around the world the report notes:

In the U.S., winter extended well into April for many parts of the country. 

Snow covered about 480,000 square miles, which is the fifth-largest April snow cover on record, according to Rutgers Global Snow Lab. The snowpack was 209,000 square miles larger than the 1981-2010 average.

But the excess of snowfall didn't extend everywhere -- the Sierra Nevada mountains in California had 18 percent of their normal snowpack, according to the report. It was California's 12th-warmest April on record, with temperatures averaging 3.7 degrees above normal.

Baltimore was among those locales with seasonal to warmer-than-normal temperatures. BWI Marshall Airport averaged 55.3 degrees in April, 1.6 degrees above normal.

Extremes for the month at BWI were set within a one-week period, with a range from a 25-degree low April 4 to a 91-degree high April 10.