May in Cochrane is the rainiest month of the year. In May, the weather in Cochrane is typically cold. Average daily high temperature in May is about 5 degrees above zero. On average, Cochrane has 11 rainy, 9 sunny, 9 partly cloudy, and 2 cloudy days in May. The rains are usually moderate. May as well as June, July, and August is considered the most uncomfortable time to visit Cochrane.