In June, the weather in Carrick-on-Shannon is typically warm. Average daily high temperature in June is about 15 degrees above zero. On average, Carrick-on-Shannon has 25 rainy, 3 sunny, 1 cloudy, and 1 partly cloudy day in June. The rains are usually heavy. June as well as January, February, March, and April is considered the most uncomfortable time to visit Carrick-on-Shannon.