Douglas climate — normals and trends
Douglas (Isle of Man) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.0 °C and it receives 979 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is August (14.6 °C on average) and the coldest is February (6.0 °C). Rainfall peaks in November.
Douglas averages 0 frost days, 0 hot days (≥ 30 °C) and 168 rainy days per year.
Douglas has warmed by +1.0 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.
The hottest day of the period reached 20.3 °C (on 5 August 2003) and the coldest -2.2 °C (on 12 January 1987).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
DouglasDouglas
- coords
- 54.15°, -4.48°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.0°C
Average daily high
10.9°C
Average daily low
9.2°C
Annual rainfall
979mm
Sunshine / day
8.2h
Mean relative humidity
82%
Average peak wind
38.4km/h
Seasonal range
8.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
168 d/yr
Annual snowfall
8.3 cm
Average feels-like high
6.9 °C
Average feels-like low
3.5 °C
Average peak gust
51.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.0 °C
since 1940
+0.1 °C per decade · r² = 0.31 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
20.3 °C
5 August 2003
Coldest day
-2.2 °C
12 January 1987
Wettest day
71 mm
2 October 1981
Windiest day
92.8 km/h
13 January 1965
Strongest gust
152.6 km/h
13 January 1965
Hottest feels-like
21.8 °C
22 July 2021
Coldest feels-like
-11.8 °C
14 February 1979
Snowiest day
13.2 cm
22 March 2013
Sunniest day
16.8 h
25 June 2004
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 7.9 °C | +0.3 °C | 94 mm | -3 mm |
| Feb | 7.8 °C | +0.8 °C | 59 mm | -13 mm |
| Mar | 9.1 °C | +1.6 °C | 20 mm | -49 mm |
| Apr | 10.5 °C | +1.9 °C | 58 mm | +1 mm |
| May | 12.7 °C | +2.0 °C | 38 mm | -18 mm |
| Jun | 14.6 °C | +1.7 °C | 105 mm | +49 mm |
| Jul | 16.0 °C | +1.4 °C | 62 mm | -3 mm |
| Aug | 16.8 °C | +1.5 °C | 45 mm | -32 mm |
| Sep | 15.4 °C | +0.7 °C | 176 mm | +85 mm |
| Oct | 13.4 °C | +0.4 °C | 105 mm | -8 mm |
| Nov | 11.4 °C | +0.9 °C | 198 mm | +84 mm |
| Dec | 10.0 °C | +1.1 °C | 151 mm | +40 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Douglas?
Douglas has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.0 °C and it receives 979 mm of precipitation per year.
What is the hottest day ever recorded in Douglas?
The hottest day measured in Douglas between 1940 and 2025 was 5 August 2003, reaching 20.3 °C.
What is the coldest day in Douglas?
The coldest day measured in Douglas between 1940 and 2025 was 12 January 1987, at -2.2 °C.
Does it snow in Douglas?
Yes. Douglas gets on average 8.3 cm of snow per year and has around 0 frost days.
Has the climate of Douglas warmed?
Yes: Douglas warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Douglas?
The wettest day measured in Douglas between 1940 and 2025 was 2 October 1981, with 71 mm of rain in 24 hours.
What was the windiest day in Douglas?
The windiest day measured in Douglas between 1940 and 2025 was 13 January 1965, with winds reaching 92.8 km/h.
What is the warmest month in Douglas?
The warmest month in Douglas is August (14.6 °C on average); the coldest is February (6.0 °C).
How much does it rain in Douglas?
Douglas receives on average 979 mm of precipitation per year, spread over about 168 rainy days.
Is it sunny in Douglas?
Douglas gets on average 8.2 hours of sunshine per day, roughly 2,993 hours per year over 1940-2025.
What is the biggest single-day snowfall in Douglas?
The heaviest 24-hour snowfall measured in Douglas between 1940 and 2025 was 22 March 2013, with 13.2 cm.
Are there tropical nights in Douglas?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Douglas.
What was the most extreme apparent temperature in Douglas?
In Douglas, between 1940 and 2025, the highest apparent temperature reached 21.8 °C on 22 July 2021, and the lowest was -11.8 °C on 14 February 1979.
Compare Douglas with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Douglas