June in Lake Louise is the rainiest month of the year. In June, the weather in Lake Louise is typically cold. Average daily high temperature in June is about 9 degrees above zero. On average, Lake Louise has 24 rainy, 4 sunny, 1 cloudy, and 1 partly cloudy day in June. The rains are usually heavy. June as well as January, May, and December is considered the most uncomfortable time to visit Lake Louise.