If you're looking for summer vibes, the best time to travel to Longyearbyen is in July, August and June, when the average temperature reaches 5.88 °C, while April, March and September are the 3 sunniest months of the year, with an average of 11.62 hours.
However, if you prefer colder temperatures, make sure you visit Longyearbyen during March, January or February to experience an average of -17.86 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during January, February and March, when the average precipitation in Longyearbyen is 1.25 mm, while the months of January, February and March are drier, with an average of 0 mm.