January in Salmon Arm is the snowiest, the cloudiest, and the most freezing month of the year. In January, the weather in Salmon Arm is typically freezing. Average daily high temperature in January is about 2 degrees below zero. On average, Salmon Arm has 10 cloudy, 10 partly cloudy, 9 snowy, and 2 sunny days in January. The snowfalls are usually moderate.