May in Lochgilphead is the sunniest month of the year. In May, the weather in Lochgilphead is typically warm. Average daily high temperature in May is about 12 degrees above zero. On average, Lochgilphead has 24 rainy, 6 sunny, and 1 partly cloudy day in May. The rains are usually heavy. May as well as January, February, March, and April is considered the most uncomfortable time to visit Lochgilphead.