May weather forecastLlansteffan, United Kingdom
May
Weather in May
The last month of the spring, May, is a mild month in Llansteffan, United Kingdom, with temperature in the range of an average low of 8.8°C (47.8°F) and an average high of 13.9°C (57°F).Temperature
Llansteffan notes an average high-temperature of a mild 13.9°C (57°F) in May, hardly diverging from April. An average nighttime temperature of 8.8°C (47.8°F) is observed in Llansteffan during May.Humidity
In May, the average relative humidity is 82%.Rainfall
The months with the least rainfall are April and May Rain falls for 12.8 days and accumulates 15mm (0.59") of rain.Snowfall
March through November are months without snowfall.Sea temperature
In May, the average sea temperature is 11.5°C (52.7°F).Note: Staying in 11.5°C (52.7°F) waters for just a few moments at 13°C (55.4°F) can be harrowing, and below 10°C (50°F) poses breathing and cold shock risks, depending on individual tolerance.
Daylight
The average length of the day in May in Llansteffan is 15h and 40min.On the first day of May, sunrise is at 5:47 am and sunset at 8:42 pm. On the last day of the month, sunrise is at 5:04 am and sunset at 9:25 pm BST.
Sunshine
The months with the most sunshine are April and May, with an average of 8.3h of sunshine.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: An average maximum UV index of 4 in May leads to these recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The Sun's radiation is especially intense around midday; try to stay in shade during this period. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Llansteffan, United Kingdom
- Average high temperature in May: 13.9°C
The warmest month (with the highest average high temperature) is July (17.8°C).
The months with the lowest average high temperature are January and February (7.9°C).
- Average low temperature in May: 8.8°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is February (4.8°C).
Average pressure in May
Llansteffan, United Kingdom
- Average pressure in May: 1016.7mbar
The month with the highest atmospheric pressure is May (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed in May
Llansteffan, United Kingdom
- Average wind speed in May: 16.6km/h
The windiest month (with the highest average wind speed) is December (25.2km/h).
The calmest month (with the lowest average wind speed) is June (15.9km/h).
Average humidity in May
Llansteffan, United Kingdom
- Average humidity in May: 82%
The months with the highest relative humidity are January, July, August, September, October and December (84%).
The month with the lowest relative humidity is April (81%).
Average rainfall in May
Llansteffan, United Kingdom
- Average rainfall in May: 15mm
The wettest month (with the highest rainfall) is December (35mm).
The driest months (with the least rainfall) are April and May (15mm).
Average rainfall days in May
Llansteffan, United Kingdom
- Average rainfall days in May: 12.8 days
The month with the highest number of rainy days is December (17.1 days).
The month with the least rainy days is April (11.5 days).
Average snowfall in May
Llansteffan, United Kingdom
- Average snowfall in May: 0mm
The month with the highest snowfall is January (6mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in May
Llansteffan, United Kingdom
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (1.1 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in May
Llansteffan, United Kingdom
- Average sea temperature in May: 11.5°C
The best month for swimming (with the highest average sea temperature) is August (16.8°C).
The coldest month (with the lowest average sea temperature) is March (8.3°C).
Average daylight in May /
Average sunshine in May
Llansteffan, 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
Llansteffan, United Kingdom
- Average sunshine days in May: 13.4 days
The month with the most sunshine days is March (15.2 days).
The month with the least sunshine days is July (9.2 days).
Average UV index in May
Llansteffan, 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
Llansteffan, United Kingdom
- Average cloud cover in May: 46
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 46).
Average visibility in May
Llansteffan, United Kingdom
- Average visibility in May: 9km
The months with the highest visibility are January, February, March, April, June, August, September, October, November and December (10km).
The months with the lowest visibility are May and July (9km).
