When Bruce Weber took his morning walk through the green hills of Piedmont Park on Wednesday, he wore something you don’t often see in August in Atlanta: a jacket with a fleece collar.

“Oh, it felt brisk,” he said.

It was one of those days you wish for: cool and crisp, with a breeze that feels as if it’s washing away the stale air of late summer.

A trough of low pressure had settled over the Eastern United States, allowing air from Canada to seep further south. The overnight low at Hartsfield-Jackson Atlanta International Airport was 60 degrees, according to meteorologist Keith Stellman of the National Weather Service. That was just three degrees above Atlanta’s record low for Aug. 27, set in 1879.

It was even lower at DeKalb-Peachtree Airport: 54, the lowest reading taken there on thi

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