January in Ust-Koksa is the most freezing month of the year. In January, the weather in Ust-Koksa is typically freezing. Average daily high temperature in January is about 12 degrees below zero. On average, Ust-Koksa has 14 partly cloudy, 12 sunny, and 5 snowy days in January. The snowfalls are usually light. January as well as February, April, May, and June is considered the most uncomfortable time to visit Ust-Koksa.