By now, everyone in D.C. has seen them: Those professional men moping around downtown and Capitol Hill in the summer, looking miserable in their sweat-spattered suits.

And it seems there is good reason for all that shvitzing. D.C. is, after all, the sixth-sweatiest city in the country, according to a new report. Tampa topped the list, followed by Miami and Houston.

The makers of Honeywell Fans, working with environmental consultants, sifted through data from the National Oceanic and Atmospheric Association’s National Climatic Center and the Census Bureau to determine the rankings. They took into account factors, such as average summer temperatures, humidity levels, population density, housing density and average wind speeds.

“Geographic location has a major influence on temperatures, but so does infrastructure like residential buildings or heavy industry, which can trap heat or contribute to heat output,” said Ted Myatt, of the Environmental Health & Engineering consulting firm.

According to National Weather Service records, the average July high temperature in Washington is 88.4 degrees. At Reagan National Airport, 22 days this summer have reached the 90-degree mark — just two short of the 24 that hit that mark in all of last summer.

According to Capital Weather Gang, June will go down in the weather annals as the second wettest and the sixth-warmest June on record for Washington. That followed a May that was the warmest on record.

The top 10 sweatiest cities, according to the study:

  1. Tampa
  2. Miami
  3. Houston
  4. San Diego
  5. Orlando
  6. D.C.
  7. Raleigh
  8. Los Angeles
  9. Dallas
  10. Charlotte