David Goldman / AP
Pollen, one of the downsides of the early spring, litters the sidewalk outside the State Capitol in Atlanta, Ga., on March 20. A record high pollen count of 9,369 particles of pollen per cubic meter was measured in metro Atlanta that day.
Updated at 4:30 p.m. ET: In states from Colorado to Florida, more than 50 cities saw their warmest March on record, weather.com reported Sunday, citing National Weather Service data and its own research.
The list, compiled by weather.com meteorologist Chris Dolce, shows that a few cities in states as far west as Colorado and Wyoming saw records. But the vast majority were in the central U.S. and the South. Large cities on the list include Atlanta, Chicago, Cleveland, Detroit, Pittsburgh, St. Louis and Washington D.C.
"Chicago and Milwaukee defeated their previous March records by 4.9 and 4.8 degrees, respectively," noted Dolce on weather.com. "That's a pretty amazing margin considering this is a monthly average and records in both cities date back to 1871!"
Allergy season is in full swing, and much earlier than usual after a spate of warm weather. Pollen levels are now reaching dangerously high levels in Atlanta, Ga. NBC's Chris Jansing reports.
"It was nearly a record warm March in New York City, Philadelphia and Denver," he added, "however they came up just short and will finish in second place" in the record books.
Below's the state-by-state look:
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