Annual mean 11°C · wettest around December · prevailing wind SW
Warmest
18.3 °C
Coldest
6.6 °C
Wettest
34%
Windiest
8.7 m/s
Prevailing
SW
6.7 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Holyhead over the whole year is 11°C. July is the hottest month, with highs of about 18°C; March is the coldest, with lows of about 5°C. The rainy (wet) season in Holyhead runs from September to March, peaking in December with a 33% chance of rain on a given day. The dry season is April to August; May is the driest month, at 16%. Winds in Holyhead are highest in February, averaging 7.3 m/s (26 km/h), and lightest in May, at 4.9 m/s (18 km/h). The prevailing wind is from the SW. The clearest skies in Holyhead come in May, when the sky is typically 58% covered; December is the cloudiest month, at 74%.
Month by month Holyhead climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
7°C
6°C
1°C
27%
72%
6.5 m/s
0
0
8
February
8°C
6°C
1°C
28%
68%
7.3 m/s
0
0
10
March
9°C
5°C
3°C
26%
68%
6.2 m/s
0
0
20
April
11°C
7°C
6°C
18%
62%
5.0 m/s
4
0
42
May
14°C
10°C
10°C
16%
58%
4.9 m/s
16
0
69
June
16°C
13°C
13°C
20%
63%
5.3 m/s
32
2
75
July
18°C
14°C
14°C
21%
68%
5.0 m/s
45
3
79
August
18°C
14°C
14°C
21%
65%
5.6 m/s
43
2
78
September
16°C
13°C
12°C
26%
66%
5.5 m/s
28
2
73
October
13°C
11°C
8°C
27%
68%
6.3 m/s
4
0
58
November
10°C
8°C
4°C
29%
70%
6.2 m/s
0
0
31
December
8°C
7°C
2°C
33%
74%
6.8 m/s
0
0
14
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Holyhead weather by season
Year round, Holyhead has days of about 7°C at their warmest in January, its coolest month, and 18°C in July, its warmest; the coolest hours of the day run from 5°C to 14°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around December and least likely around May. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Holyhead weather in winterDecember to February
High 8°CLow 6°CRain 29%
Winter in Holyhead has typical daily highs of about 8°C and lows of about 6°C, with a 29% chance of rain on a given day.
Holyhead weather in springMarch to May
High 11°CLow 7°CRain 20%
Spring in Holyhead has typical daily highs of about 11°C and lows of about 7°C, with a 20% chance of rain on a given day.
Holyhead weather in summerJune to August
High 17°CLow 14°CRain 20%
Summer in Holyhead has typical daily highs of about 17°C and lows of about 14°C, with a 20% chance of rain on a given day.
Holyhead weather in autumnSeptember to November
High 13°CLow 10°CRain 27%
Autumn in Holyhead has typical daily highs of about 13°C and lows of about 10°C, with a 27% chance of rain on a given day.
When is the rainy season in Holyhead?
The rainy (wet) season in Holyhead runs from September to March, peaking in December with a 33% chance of rain on a given day. The dry season is April to August; May is the driest month, at 16%.
What time of year is Holyhead windiest?
Winds in Holyhead are highest in February, averaging 7.3 m/s (26 km/h), and lightest in May, at 4.9 m/s (18 km/h). The prevailing wind is from the SW.
What is the average temperature in Holyhead year round?
The average temperature in Holyhead over the whole year is 11°C. July is the hottest month, with highs of about 18°C; March is the coldest, with lows of about 5°C.