January in Ust-Dunguy is the most freezing month of the year. In January, the weather in Ust-Dunguy is typically freezing. Average daily high temperature in January is about 16 degrees below zero. On average, Ust-Dunguy has 18 partly cloudy and 13 sunny days in January. January as well as February and December is considered the most uncomfortable time to visit Ust-Dunguy.