Isle of Man (Douglas) climate
Isle of Man (Douglas) (the Isle of Man, a British Crown Dependency) has a temperate oceanic climate (Köppen Cfb). The average temperature over the year is 11 °C51 °F, and about 1,124 mm44 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Isle of Man (Douglas) climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 847 | 643 | 745 | 1104.3 |
| Feb | 745 | 642 | 744 | 893.5 |
| Mar | 846 | 643 | 744 | 823.2 |
| Apr | 949 | 745 | 847 | 622.5 |
| May | 1253 | 1049 | 1151 | 652.5 |
| Jun | 1457 | 1254 | 1355 | 742.9 |
| Jul | 1560 | 1457 | 1558 | 793.1 |
| Aug | 1661 | 1458 | 1559 | 973.8 |
| Sep | 1559 | 1456 | 1458 | 903.5 |
| Oct | 1356 | 1253 | 1355 | 1234.9 |
| Nov | 1152 | 949 | 1050 | 1264.9 |
| Dec | 949 | 745 | 847 | 1265.0 |
| Year | 1661 | 642 | 1151 | 1,12444 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 85% | 81% | 0.6 | 7:54 |
| Feb | 85% | 79% | 1.3 | 9:40 |
| Mar | 85% | 76% | 2.5 | 11:40 |
| Apr | 85% | 72% | 3.9 | 13:58 |
| May | 85% | 70% | 5.0 | 15:58 |
| Jun | 87% | 75% | 5.1 | 17:08 |
| Jul | 87% | 77% | 4.8 | 16:39 |
| Aug | 87% | 76% | 4.0 | 14:51 |
| Sep | 85% | 76% | 2.8 | 12:36 |
| Oct | 83% | 79% | 1.5 | 10:24 |
| Nov | 83% | 80% | 0.7 | 8:24 |
| Dec | 84% | 80% | 0.4 | 7:22 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Isle of Man (Douglas) is like
The warmest month is August, with an average high of 16 °C61 °F and a low of 14 °C58 °F. The coldest is February, when highs average 7 °C45 °F and lows 6 °C42 °F. There is a clear seasonal cycle, with 8.6 °C15.5 °F between the average temperature of the warmest and the coolest month.
It is wet, with about 1,124 mm44 in of precipitation per year. The wettest three-month stretch is October–December, which brings 33% of the annual total. The wettest month is December (126 mm5.0 in), the driest is April (62 mm2.5 in).
Relative humidity ranges from 83% in November to 87% in July. The clearest skies (lowest average cloud amount, 70%) are typical of May. Average wind speed near the ground ranges from 16 km/h (10 mph) in June to 28 km/h (18 mph) in January. Daylight lasts from about 7.4 hours in December to 17.1 hours in June.
Best time to visit Isle of Man (Douglas)
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–September: average highs of 14 °C57 °F to 16 °C61 °F with 74 mm2.9 in to 97 mm3.8 in of precipitation per month.
The most challenging month is December, which is cold, with average highs of 9 °C49 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Isle of Man (Douglas)
- Winter (December–February) — highs 745 to 9 °C49 °F, lows 642 to 7 °C45 °F, about 109 mm4.3 in of precipitation a month. Pack a warm coat, layers and closed shoes and an umbrella or light rain jacket.
- Spring (March–May) — highs 846 to 12 °C53 °F, lows 643 to 10 °C49 °F, about 70 mm2.7 in of precipitation a month. Pack a warm coat, layers and closed shoes.
- Summer (June–August) — highs 1457 to 16 °C61 °F, lows 1254 to 14 °C58 °F, about 83 mm3.3 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Autumn (September–November) — highs 1152 to 15 °C59 °F, lows 949 to 14 °C56 °F, about 113 mm4.4 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an umbrella or light rain jacket.
How Isle of Man (Douglas) compares
Compared with Blackpool, about 101 km to the east, Isle of Man (Douglas) is on average 0.5 °C0.8 °F warmer and receives a similar amount of precipitation. The difference is largest in December (2 °C3.7 °F warmer).
Of the 66 places in the United Kingdom covered by World Climates, Isle of Man (Douglas) is the 23rd warmest by annual mean temperature and the 6th wettest by annual precipitation. See all of them on the United Kingdom climate page.
Places in other countries with the most similar temperature and rainfall pattern: Cork (Ireland, Cfb), Dublin (Ireland, Cfb) and Limerick (Ireland, Cfb).
Nearby places
- Valley 96 km · 11 °C52 °F · 1,123 mm44 in
- Blackpool 101 km · 10 °C50 °F · 1,164 mm46 in
- Belfast 106 km · 10 °C50 °F · 1,068 mm42 in
- Preston 124 km · 10 °C49 °F · 1,147 mm45 in
- Birkenhead 128 km · 10 °C50 °F · 980 mm39 in
- Liverpool 129 km · 10 °C50 °F · 980 mm39 in
- Dublin 147 km · 10 °C50 °F · 983 mm39 in
- Manchester 165 km · 10 °C49 °F · 1,002 mm39 in
Frequently asked questions
What is the warmest month in Isle of Man (Douglas)?
August is the warmest month in Isle of Man (Douglas), with an average high of 16 °C (61 °F) and an average low of 14 °C (58 °F).
What is the coldest month in Isle of Man (Douglas)?
February is the coldest month, with an average high of 7 °C (45 °F) and an average low of 6 °C (42 °F).
When does it rain the most in Isle of Man (Douglas)?
December is the wettest month with about 126 mm (5.0 in) of precipitation; April is the driest with about 62 mm (2.5 in).
What is the best time to visit Isle of Man (Douglas)?
Judging by long-term averages, the most comfortable months are June–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.