Question

Dog Days of Summer the hottest and most humid days of summer, usually much of July and August

Accepted Answer

Sales of air conditioners are usually highest during the dog days of summer. In ancient Roman times people who studied astronomy knew that I Sirius, the Dog Star, rose and set with the sun during the hottest weeks of the year, July through mid-August. People thought that the heat from the Dog Star combined with the heat from the sun to make those weeks extra hot. That's why people today call this uncomfortable time the "dog days." People tend to get bored and tired at this time because it's so hot outside.

Idiom	Dog Days of Summer
Example	Sales of air conditioners are usually highest during the dog days of summer.
Meaning	the hottest and most humid days of summer, usually much of July and August
Origin	In ancient Roman times people who studied astronomy knew that I Sirius, the Dog Star, rose and set with the sun during the hottest weeks of the year, July through mid-August. People thought that the heat from the Dog Star combined with the heat from the sun to make those weeks extra hot. That's why people today call this uncomfortable time the "dog days." People tend to get bored and tired at this time because it's so hot outside.

Dog People Days Summer Hottest July Sun Weeks