In June, the weather in Longyearbyen is typically cold. Average daily high temperature in June is about 1 degree above zero. On average, Longyearbyen has 22 cloudy, 6 rainy, 1 snowy, and 1 sunny day in June. The rains are usually light. June as well as January, February, March, and July is considered the most uncomfortable time to visit Longyearbyen.