Deeside climate — normals and trends
Deeside (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.8 °C and it receives 820 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 July (15.9 °C on average) and the coldest is January (4.2 °C). Rainfall peaks in August.
Deeside averages 32 frost days, 0 hot days (≥ 30 °C) and 158 rainy days per year.
Deeside has warmed by +1.7 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 49 to 15 per year over the period.
The hottest day of the period reached 33.9 °C (on 18 July 2022) and the coldest -15.7 °C (on 25 January 1963).
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
DeesideWales
- coords
- 53.20°, -3.04°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.8°C
Average daily high
12.7°C
Average daily low
6.9°C
Annual rainfall
820mm
Sunshine / day
7.8h
Mean relative humidity
82%
Average peak wind
20.4km/h
Seasonal range
11.7°C
Frost days (< 0 °C)
32 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
158 d/yr
Annual snowfall
17.9 cm
Average feels-like high
10.1 °C
Average feels-like low
4.0 °C
Average peak gust
41.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.44 · 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
33.9 °C
18 July 2022
Coldest day
-15.7 °C
25 January 1963
Wettest day
63 mm
24 September 2012
Windiest day
61.9 km/h
30 November 1954
Strongest gust
126.7 km/h
23 February 1967
Hottest feels-like
33.8 °C
18 July 2022
Coldest feels-like
-20.3 °C
25 January 1963
Snowiest day
13.9 cm
16 January 1955
Sunniest day
16.3 h
21 June 2018
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 | 6.3 °C | -0.1 °C | 112 mm | +48 mm |
| Feb | 7.8 °C | +0.9 °C | 29 mm | -23 mm |
| Mar | 12.1 °C | +2.9 °C | 20 mm | -39 mm |
| Apr | 15.8 °C | +4.0 °C | 41 mm | -21 mm |
| May | 18.0 °C | +3.0 °C | 35 mm | -37 mm |
| Jun | 20.3 °C | +2.5 °C | 89 mm | +16 mm |
| Jul | 20.5 °C | +1.3 °C | 52 mm | -26 mm |
| Aug | 21.2 °C | +2.2 °C | 31 mm | -50 mm |
| Sep | 17.2 °C | +0.4 °C | 119 mm | +48 mm |
| Oct | 13.7 °C | +0.3 °C | 59 mm | -10 mm |
| Nov | 10.9 °C | +1.5 °C | 115 mm | +46 mm |
| Dec | 9.2 °C | +1.9 °C | 109 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 Deeside?
Deeside has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.8 °C and it receives 820 mm of precipitation per year.
What is the hottest day ever recorded in Deeside?
The hottest day measured in Deeside between 1940 and 2025 was 18 July 2022, reaching 33.9 °C.
What is the coldest day in Deeside?
The coldest day measured in Deeside between 1940 and 2025 was 25 January 1963, at -15.7 °C.
Does it snow in Deeside?
Yes. Deeside gets on average 17.9 cm of snow per year and has around 32 frost days.
Has the climate of Deeside warmed?
Yes: Deeside warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Deeside?
The wettest day measured in Deeside between 1940 and 2025 was 24 September 2012, with 63 mm of rain in 24 hours.
What was the windiest day in Deeside?
The windiest day measured in Deeside between 1940 and 2025 was 30 November 1954, with winds reaching 61.9 km/h.
What is the warmest month in Deeside?
The warmest month in Deeside is July (15.9 °C on average); the coldest is January (4.2 °C).
How much does it rain in Deeside?
Deeside receives on average 820 mm of precipitation per year, spread over about 158 rainy days.
Is it sunny in Deeside?
Deeside gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.
What is the biggest single-day snowfall in Deeside?
The heaviest 24-hour snowfall measured in Deeside between 1940 and 2025 was 16 January 1955, with 13.9 cm.
Are there tropical nights in Deeside?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Deeside.
What was the most extreme apparent temperature in Deeside?
In Deeside, between 1940 and 2025, the highest apparent temperature reached 33.8 °C on 18 July 2022, and the lowest was -20.3 °C on 25 January 1963.
Compare Deeside with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Deeside