Planes can get pretty hot on the ground during the summer, especially when they’re not running the air conditioning with auxiliary power.
Passengers are often asked to close the shades upon landing, keeping out the sun keeps the cabin from heating up as much. On boarding all the windows are closed and most passengers leave them that way. Once the engines start running, and the plane gets up in the air, things cool down quickly.
American Airlines will board a plane if the temperature is less than 90 degrees, though as always this is at the discretion of the pilot. US Airways’ policy has been an 85 degree maximum…