January in Lethbridge is the snowiest month of the year. In January, the weather in Lethbridge is typically freezing. Average daily high temperature in January is about zero. On average, Lethbridge has 11 partly cloudy, 10 sunny, 6 cloudy, and 4 snowy days in January. The snowfalls are usually light. January as well as February, March, November, and December is considered the most uncomfortable time to visit Lethbridge.