May weather forecastKillay, United Kingdom
May
Weather in May
The last month of the spring, May, is a mild month in Killay, United Kingdom, with an average temperature varying between 13.8°C (56.8°F) and 9.2°C (48.6°F).Temperature
May's climate shows a minor adjustment in average high-temperatures to a mild 13.8°C (56.8°F) from April's 11.6°C (52.9°F). In May, Killay experiences a marginal drop in temperature, with averages of 9.2°C (48.6°F) at night.Humidity
In May, the average relative humidity is 81%.Rainfall
The month with the least rainfall is May, when the rain falls for 15.2 days and typically collects 37mm (1.46") of precipitation.Snowfall
In Killay, snow does not fall in April through November.Daylight
In Killay, the average length of the day in May is 15h and 39min.On the first day of May, sunrise is at 5:46 am and sunset at 8:40 pm. On the last day of the month, sunrise is at 5:04 am and sunset at 9:23 pm BST.
Sunshine
April and May, with an average of 8.3h of sunshine, are months with the most sunshine in Killay, United Kingdom.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index in Killay, United Kingdom. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A daily high UV index of 4 in May leads to these guidelines:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Killay, United Kingdom
- Average high temperature in May: 13.8°C
The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is February (7.8°C).
- Average low temperature in May: 9.2°C
The month with the highest average low temperature is August (14.1°C).
The coldest month (with the lowest average low temperature) is February (5°C).
Average pressure in May
Killay, United Kingdom
- Average pressure in May: 1016.7mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.8mbar).
Average wind speed in May
Killay, United Kingdom
- Average wind speed in May: 17.2km/h
The windiest month (with the highest average wind speed) is December (25.7km/h).
The calmest month (with the lowest average wind speed) is June (16.4km/h).
Average humidity in May
Killay, United Kingdom
- Average humidity in May: 81%
The months with the highest relative humidity are January, August and December (84%).
The month with the lowest relative humidity is April (80%).
Average rainfall in May
Killay, United Kingdom
- Average rainfall in May: 37mm
The wettest month (with the highest rainfall) is December (101mm).
The driest month (with the least rainfall) is May (37mm).
Average rainfall days in May
Killay, United Kingdom
- Average rainfall days in May: 15.2 days
The month with the highest number of rainy days is December (21.4 days).
The month with the least rainy days is April (14.4 days).
Average snowfall in May
Killay, United Kingdom
- Average snowfall in May: 0mm
The month with the highest snowfall is December (8mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in May
Killay, United Kingdom
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (1.1 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
Killay, United Kingdom
- Average daylight in May: 15h and 42min
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 18min
The months with the most sunshine are April and May (Average sunshine: 8h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Killay, United Kingdom
- Average sunshine days in May: 13 days
The month with the most sunshine days is May (13 days).
The month with the least sunshine days is December (6.6 days).
Average UV index in May
Killay, 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
Killay, United Kingdom
- Average cloud cover in May: 45
The month with the most cloud cover is December (Cloud cover 63).
The months with the least cloud cover are April and May (Cloud cover 45).
Average visibility in May
Killay, United Kingdom
- Average visibility in May: 9km
The months with the highest visibility are March, April, June, July and October (10km).
The months with the lowest visibility are January, February, May, August, September, November and December (9km).
