May in Tolka is the rainiest month of the year. In May, the weather in Tolka is typically cold. Average daily high temperature in May is about 4 degrees above zero. On average, Tolka has 20 rainy, 8 cloudy, and 3 snowy days in May. The rains are usually moderate. May as well as January, February, March, and September is considered the most uncomfortable time to visit Tolka.