Winter weather frequently causes dry, cracked hands due to the combination of cold temperatures, low humidity, and exposure to harsh winds, which strip the skin of its natural moisture. Dr. Whitney Hovenic, a dermatologist in Reno, Nevada, advises a proactive approach to combat this issue, emphasizing hydration and protection. The dry air outside and the dry heat inside, coupled with frequent hand washing and sanitizer use, exacerbate the problem by removing essential oils from the skin.