June in Omagh is the cloudiest month of the year. In June, the weather in Omagh is typically warm. Average daily high temperature in June is about 14 degrees above zero. On average, Omagh has 25 rainy, 3 cloudy, and 2 sunny days in June. The rains are usually heavy. June as well as January, February, March, and April is considered the most uncomfortable time to visit Omagh.