It's a commonly-held belief that hair grows faster during summer months. It relates to the observation that many notice a difference in hair growth rate between summer and winter.
This purported phenomenon has gained significance due to its relevance to hair care practices. If true, knowing the role that seasons play in hair growth can help individuals optimize their routines for desired outcomes. Historically, seasonal hair growth patterns have been acknowledged in traditional beauty regimes, with certain hair treatments and rituals associated with specific times of the year.