Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average sea temperature in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May's presence records an average high-temperature of a still cool 12.2°C (54°F), closely mirroring April's climate. An average nighttime temperature of 9.8°C (49.6°F) marks May.Humidity
The average relative humidity in May in Holyhead is 82%.Rainfall
The month with the least rainfall in Holyhead is May, when the rain falls for 16.4 days and typically collects 36mm (1.42") of precipitation.Snowfall
In Holyhead, snow does not fall in April through October.Sea temperature
In May, the average sea temperature is 10.3°C (50.5°F).Note: In 10.3°C (50.5°F), even brief exposure to 13°C (55.4°F) feels biting, and anything less than 10°C (50°F) risks cold shock and impaired breathing, considering one's health.
Daylight
In May, the average length of the day is 15h and 54min.On the first day of May in Holyhead, United Kingdom, sunrise is at 5:42 am and sunset at 8:48 pm. On the last day of the month, sunrise is at 4:57 am and sunset at 9:35 pm BST.
Sunshine
May has the most sunshine of the year, with an average of 8.5h of sunshine.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The average daily UV index of 4 in May transforms into the following instructions:
Exercise prevention - Protecting skin and eyes from harm is required. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
What is the usual temperature for Holyhead in May?
What is the average humidity in May in Holyhead?
What is the driest month in Holyhead?
How many days does it rain in May in Holyhead?
When it does not snow in Holyhead?
How cold is the water in May in Holyhead?
How many hours of daylight does Holyhead have in May?
What time are sunrise and sunset in May in Holyhead?
What month has the most sunshine in Holyhead?
How long on average sun shines in May in Holyhead?
What is the month with the highest UV index in Holyhead?
What is the UV index reading in May in Holyhead?
Average temperature in May
Holyhead, United Kingdom
- Average high temperature in May: 12.2°C
The warmest month (with the highest average high temperature) is August (16.6°C).
The month with the lowest average high temperature is February (7.8°C).
- Average low temperature in May: 9.8°C
The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is February (5.8°C).
Average pressure in May
Holyhead, United Kingdom
- Average pressure in May: 1016.1mbar
The month with the highest atmospheric pressure is May (1016.1mbar).
The month with the lowest atmospheric pressure is November (1008.7mbar).
Average wind speed in May
Holyhead, United Kingdom
- Average wind speed in May: 20.7km/h
The windiest month (with the highest average wind speed) is December (31.3km/h).
The calmest month (with the lowest average wind speed) is June (18.7km/h).
Average humidity in May
Holyhead, United Kingdom
- Average humidity in May: 82%
The months with the highest relative humidity are July and August (84%).
The month with the lowest relative humidity is November (79%).
Average rainfall in May
Holyhead, United Kingdom
- Average rainfall in May: 36mm
The wettest month (with the highest rainfall) is November (87mm).
The driest month (with the least rainfall) is May (36mm).
Average rainfall days in May
Holyhead, United Kingdom
- Average rainfall days in May: 16.4 days
The month with the highest number of rainy days is August (23.4 days).
The month with the least rainy days is April (15.6 days).
Average snowfall in May
Holyhead, United Kingdom
- Average snowfall in May: 0mm
The months with the highest snowfall are January and December (4mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in May
Holyhead, United Kingdom
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in May
Holyhead, United Kingdom
- Average sea temperature in May: 10.3°C
The best month for swimming (with the highest average sea temperature) is September (15.2°C).
The coldest month (with the lowest average sea temperature) is March (8.3°C).
Average daylight in May /
Average sunshine in May
Holyhead, United Kingdom
- Average daylight in May: 15h and 5min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in May: 8h and 3min
The month with the most sunshine is May (Average sunshine: 8h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in May
Holyhead, United Kingdom
- Average sunshine days in May: 12.3 days
The month with the most sunshine days is May (12.3 days).
The month with the least sunshine days is December (4.3 days).
Average UV index in May
Holyhead, United Kingdom
- Average UV index in May: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in May
Holyhead, United Kingdom
- Average cloud cover in May: 46
The month with the most cloud cover is December (Cloud cover 65).
The month with the least cloud cover is May (Cloud cover 46).
Average visibility in May
Holyhead, United Kingdom
- Average visibility in May: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Holyhead, United Kingdom
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