Vata dosha can be influenced by external factors such as seasons and the time of day. For example, during the fall and early winter seasons when the weather tends to be cold, dry, and windy, Vata dosha can be aggravated. In Ayurveda, the day is divided into six two-hour periods called dosha cycles, with each dosha dominant during specific periods. Vata dosha is dominant during the early morning hours from 2 a.m. to 6 a.m. and the late afternoon hours from 2 pm. to 6 pm.