In May, the weather in Anahim Lake is typically warm. Average daily high temperature in May is about 12 degrees above zero. On average, Anahim Lake has 12 rainy, 7 cloudy, 7 partly cloudy, and 5 sunny days in May. The rains are usually moderate. May as well as February, March, April, and June is considered the most uncomfortable time to visit Anahim Lake.