Many pet owners are curious to know if there is a flea season. The answer is yes and no. Fleas are most active in warm weather, so they're more common in the summer months. However, they can survive in cooler climates as well. Fleas can live indoors all year round, making them a year-round problem for some pet owners.The good news is that you can take steps to prevent fleas from taking up residence in your home. Vacuuming regularly, using a lint roller on your furniture, and washing your bedding in hot water are all effective ways to keep fleas at bay.