May weather forecast
Efailwen, United Kingdom

May

Weather in May

May, the last month of the spring in Efailwen, is a mild month, with an average temperature varying between 13.3°C (55.9°F) and 9.5°C (49.1°F).

Temperature

May registers an average high-temperature of a mild 13.3°C (55.9°F), slightly varied from April's 11.3°C (52.3°F). A consistent average low of 9.5°C (49.1°F) is noted in Efailwen throughout May, only a small step down from its daytime high.

Humidity

The average relative humidity in May in Efailwen, United Kingdom, is 82%.

Rainfall

May is the month with the least rainfall. Rain falls for 13.9 days and accumulates 23mm (0.91") of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In Efailwen, the average length of the day in May is 15h and 41min.
On the first day of May in Efailwen, sunrise is at 5:48 am and sunset at 8:43 pm. On the last day of the month, sunrise is at 5:05 am and sunset at 9:27 pm BST.

Sunshine

The month with the most sunshine in Efailwen is May, with an average of 8.4h of sunshine.

UV index

May through September, with an average maximum UV index of 4, are months with the highest UV index in Efailwen. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 4 during May translates into the following guidance:
Guard yourself - An obligation to protect skin and eyes from harm exists. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.

Frequently asked questions

What is the usual temperature for Efailwen in May?
Efailwen in May has an average high-temperature of 13.3°C (55.9°F) and an average low-temperature of 9.5°C (49.1°F).
What is the average humidity in May in Efailwen?
In Efailwen, the average relative humidity in May is 82%.
What is the driest month in Efailwen?
The month with the least rainfall in Efailwen, United Kingdom, is May, when the rain falls for 13.9 days and typically collects 23mm (0.91") of precipitation.
How much does it rain in Efailwen in May?
In Efailwen, during May, the rain falls for 13.9 days and regularly aggregates up to 23mm (0.91") of precipitation.
When it does not snow in Efailwen?
In Efailwen, United Kingdom, snow does not fall in April through October.
How many hours of daylight does Efailwen have in May?
In May, the average day length in Efailwen, United Kingdom, is 15h and 41min.
When are sunrise and sunset in May in Efailwen?
On the first day of May in Efailwen, United Kingdom, sunrise is at 5:48 am and sunset at 8:43 pm. On the last day of the month, sunrise is at 5:05 am and sunset at 9:27 pm BST.
What month has the most sunshine in Efailwen?
The month with the most sunshine in Efailwen, United Kingdom, is May, with an average of 8.4h of sunshine.
How long on average sun shines in May in Efailwen?
In Efailwen, the average sunshine duration in May is 8.4h.
What is the month with the highest UV index in Efailwen?
May through September, with an average maximum UV index of 4, are months with the highest UV index in Efailwen, United Kingdom.
What is the UV index reading in May in Efailwen?
In Efailwen, United Kingdom, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in May
Efailwen, United Kingdom
  • Average high temperature in May: 13.3°C

The warmest month (with the highest average high temperature) is August (17.2°C).
The month with the lowest average high temperature is February (8.3°C).

  • Average low temperature in May: 9.5°C

The month with the highest average low temperature is August (14.6°C).
The coldest month (with the lowest average low temperature) is February (5.6°C).

Average pressure in May
Efailwen, United Kingdom
  • Average pressure in May: 1016.6mbar

The months with the highest atmospheric pressure are May and September (1016.6mbar).
The month with the lowest atmospheric pressure is November (1009.5mbar).

Average wind speed in May
Efailwen, United Kingdom
  • Average wind speed in May: 18.5km/h

The windiest month (with the highest average wind speed) is December (29.1km/h).
The calmest month (with the lowest average wind speed) is June (17.9km/h).

Average humidity in May
Efailwen, United Kingdom
  • Average humidity in May: 82%

The months with the highest relative humidity are July and August (84%).
The months with the lowest relative humidity are February, March, April, November and December (81%).

Average rainfall in May
Efailwen, United Kingdom
  • Average rainfall in May: 23mm

The wettest month (with the highest rainfall) is November (77mm).
The driest month (with the least rainfall) is May (23mm).

Average rainfall days in May
Efailwen, United Kingdom
  • Average rainfall days in May: 13.9 days

The month with the highest number of rainy days is November (21.9 days).
The month with the least rainy days is May (13.9 days).

Average snowfall in May
Efailwen, United Kingdom
  • Average snowfall in May: 0mm

The month with the highest snowfall is January (8mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in May
Efailwen, United Kingdom
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in May /
Average sunshine in May
Efailwen, United Kingdom
  • Average daylight in May: 15h and 4min

The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).

  • Average sunshine in May: 8h and 2min

The month with the most sunshine is May (Average sunshine: 8h and 24min).
The months with the least sunshine are January, November and December (Average sunshine: 3h and 42min).

Average sunshine days in May
Efailwen, United Kingdom
  • Average sunshine days in May: 14.2 days

The month with the most sunshine days is May (14.2 days).
The month with the least sunshine days is November (5.5 days).

Average UV index in May
Efailwen, 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 and February (UV index 2).

Average cloud cover in May
Efailwen, United Kingdom
  • Average cloud cover in May: 46

The months with the most cloud cover are November and December (Cloud cover 64).
The month with the least cloud cover is May (Cloud cover 46).

Average visibility in May
Efailwen, 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).

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