Weather Talk: Summer's dog days refer to Sirius, the Dog Star
Days of hot and sticky weather, often during the high summer months of July and August, are commonly referred to as the dog days.
Ancient Greeks as well as others believed the hot weather during late summer was due to heat from Sirius combining with heat from the sun as the bright star could be seen rising and setting in tandem with the sun for a few weeks during the hottest part of the year.
Some ancient cultures may have even sacrificed dogs to the gods to encourage the hot weather to end. Fortunately, this summer’s dog days have been relatively cool, so far.