Do Fleas Go Away or Become Dormant in Winter and Fall?

Adult fleas do become less active in cold weather conditions, as they prefer temperatures above 70° and relative humidity above 70%.

If you live in an area that has a cold winter, the adult fleas may die, but the flea pupa remain dormant and encased in a silken cocoon which protects them during the winter conditions.

They can remain in their cocoon for months at a time only to emerge when conditions become more favorable for them. In this way, the flea life cycle is insured to continue at the termination of winter conditions.

Treat Flea Bites with These OTC Medicines

CalamineHydrocortisoneAloe Vera
Calamine LotionHydrocortisone Cream Aloe Vera

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