In March, the weather in Lethbridge is typically cold. Average daily high temperature in March is about 6 degrees above zero. On average, Lethbridge has 11 partly cloudy, 9 sunny, 6 cloudy, 3 snowy, and 2 rainy days in March. The snowfalls are usually light. March as well as January, February, November, and December is considered the most uncomfortable time to visit Lethbridge.