In March, the weather in Penticton is typically cold. Average daily high temperature in March is about 5 degrees above zero. On average, Penticton has 9 partly cloudy, 7 sunny, 7 cloudy, 5 rainy, and 3 snowy days in March. The rains are usually moderate. March as well as February, April, May, and October is considered the most uncomfortable time to visit Penticton.