Winter weather can exacerbate hair dryness, weakness, and breakage due to lower humidity and temperature. Common mistakes include washing hair too often, which strips natural oils, and insufficient conditioning, leaving strands vulnerable. Ignoring scalp health, stepping out with wet hair, and overusing heat styling tools further damage hair. Wearing tight hairstyles and friction from winter clothing can also contribute to hair problems. Adjusting hair care routines to combat seasonal dryness is crucial for maintaining hair health.