SeasonMapDouglas weather by month
Isle of Man
The best time to visit Douglas is June to August — 88/100 in July, 19°C and 11 rainy days. The best season is summer, June to August (86/100 on average).
The worst month is December at 50/100 — cold, rainy, clean air. See December →
Updated September 2026 · climate normals from ERA5 reanalysis
Douglas, month by month
Comfort score out of 100 for the kind of trip Douglas is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
| Month | Score | Tier | High | Rain | Sun | Crowds | On |
|---|---|---|---|---|---|---|---|
| JanJanuary | 53 | D | 9°C | 15 d | 4 h | Quiet | — |
| FebFebruary | 59 | D | 9°C | 13 d | 6 h | Shoulder | — |
| MarMarch | 67 | C | 10°C | 12 d | 8 h | Shoulder | — |
| AprApril | 75 | B | 12°C | 9 d | 10 h | Shoulder | — |
| MayMay | 82 | A | 15°C | 8 d | 12 h | Busy | 1 |
| JunJune | 85 | A | 17°C | 9 d | 12 h | Busy | 1 |
| JulJuly | 88 | A | 19°C | 11 d | 11 h | Busy | 1 |
| AugAugust | 86 | A | 19°C | 11 d | 10 h | Busy | 1 |
| SepSeptember | 77 | B | 17°C | 14 d | 8 h | Busy | 1 |
| OctOctober | 66 | C | 14°C | 16 d | 6 h | Shoulder | — |
| NovNovember | 57 | D | 11°C | 16 d | 4 h | Quiet | — |
| DecDecember | 50 | D | 10°C | 18 d | 3 h | Quiet | — |
What's on in Douglas through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
Crowds in Douglas in July
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyTynwald Day, school holidays in 7 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet