January in Russian Mission is the sunniest and the most freezing month of the year. In January, the weather in Russian Mission is typically freezing. Average daily high temperature in January is about 12 degrees below zero. On average, Russian Mission has 8 sunny, 8 cloudy, 8 partly cloudy, and 7 snowy days in January. The snowfalls are usually light. January as well as February, March, April, and July is considered the most uncomfortable time to visit Russian Mission.