Holyhead climate — normals and trends
Holyhead (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.5 °C and it receives 964 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 (15.2 °C on average) and the coldest is February (6.2 °C). Rainfall peaks in November.
Holyhead averages 3 frost days, 0 hot days (≥ 30 °C) and 168 rainy days per year.
Holyhead has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The number of frost days there went from about 6 to 0 per year over the period.
The hottest day of the period reached 28.2 °C (on 19 July 2006) and the coldest -4.5 °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
HolyheadWales
- coords
- 53.31°, -4.63°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.5°C
Average daily high
12.0°C
Average daily low
9.0°C
Annual rainfall
964mm
Sunshine / day
8.3h
Mean relative humidity
81%
Average peak wind
30.9km/h
Seasonal range
9.0°C
Frost days (< 0 °C)
3 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
168 d/yr
Annual snowfall
6.2 cm
Average feels-like high
8.7 °C
Average feels-like low
4.6 °C
Average peak gust
47.3 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.32 · 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
28.2 °C
19 July 2006
Coldest day
-4.5 °C
12 January 1987
Wettest day
53 mm
25 August 1986
Windiest day
88.0 km/h
24 December 1997
Strongest gust
167.4 km/h
24 December 1997
Hottest feels-like
31.6 °C
29 July 1948
Coldest feels-like
-11.8 °C
13 January 1987
Snowiest day
11.3 cm
8 January 1982
Sunniest day
16.6 h
20 June 2022
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 | 8.0 °C | +0.1 °C | 126 mm | +30 mm |
| Feb | 8.3 °C | +0.7 °C | 61 mm | -10 mm |
| Mar | 10.4 °C | +1.8 °C | 22 mm | -48 mm |
| Apr | 13.0 °C | +2.8 °C | 93 mm | +33 mm |
| May | 14.5 °C | +1.9 °C | 39 mm | -19 mm |
| Jun | 16.2 °C | +1.3 °C | 103 mm | +47 mm |
| Jul | 17.9 °C | +1.5 °C | 59 mm | -1 mm |
| Aug | 18.5 °C | +1.7 °C | 40 mm | -33 mm |
| Sep | 16.2 °C | +0.5 °C | 161 mm | +75 mm |
| Oct | 13.9 °C | +0.4 °C | 113 mm | +6 mm |
| Nov | 12.0 °C | +1.3 °C | 228 mm | +113 mm |
| Dec | 10.1 °C | +1.1 °C | 180 mm | +69 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 Holyhead?
Holyhead has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.5 °C and it receives 964 mm of precipitation per year.
What is the hottest day ever recorded in Holyhead?
The hottest day measured in Holyhead between 1940 and 2025 was 19 July 2006, reaching 28.2 °C.
What is the coldest day in Holyhead?
The coldest day measured in Holyhead between 1940 and 2025 was 12 January 1987, at -4.5 °C.
Does it snow in Holyhead?
Yes. Holyhead gets on average 6.2 cm of snow per year and has around 3 frost days.
Has the climate of Holyhead warmed?
Yes: Holyhead warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Holyhead?
The wettest day measured in Holyhead between 1940 and 2025 was 25 August 1986, with 53 mm of rain in 24 hours.
What was the windiest day in Holyhead?
The windiest day measured in Holyhead between 1940 and 2025 was 24 December 1997, with winds reaching 88.0 km/h.
What is the warmest month in Holyhead?
The warmest month in Holyhead is August (15.2 °C on average); the coldest is February (6.2 °C).
How much does it rain in Holyhead?
Holyhead receives on average 964 mm of precipitation per year, spread over about 168 rainy days.
Is it sunny in Holyhead?
Holyhead gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.
What is the biggest single-day snowfall in Holyhead?
The heaviest 24-hour snowfall measured in Holyhead between 1940 and 2025 was 8 January 1982, with 11.3 cm.
Are there tropical nights in Holyhead?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Holyhead.
What was the most extreme apparent temperature in Holyhead?
In Holyhead, between 1940 and 2025, the highest apparent temperature reached 31.6 °C on 29 July 1948, and the lowest was -11.8 °C on 13 January 1987.
Compare Holyhead with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Holyhead