If you're looking for summer vibes, the best time to travel to Douglas is in June, July and August, when the average temperature reaches 30.9 °C, while May, June and April are the 3 sunniest months of the year, with an average of 237.42 hours.
However, if you prefer colder temperatures, make sure you visit Douglas during January, February or December to experience an average of 2.55 °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 April, May and January, when the average precipitation in Douglas is 3.4 mm, while the months of January, February and March are drier, with an average of 0 mm.