If you're looking for summer vibes, the best time to travel to Ilulissat is in July, June and August, when the average temperature reaches 7.49 °C, while August, April and May are the 3 sunniest months of the year, with an average of 47.75 hours.
If you prefer colder temperatures, however, make sure you visit Ilulissat during the months of January, February and March to experience an average of -17.58 °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 Ilulissat is 1.08 mm, while the months of January, February and March are drier, with an average of 0 mm.