May weather forecastLlanelli, United Kingdom
May weather for Llanelli, United Kingdom: The last month of the spring, May, is a mild month in Llanelli, United Kingdom, with an average temperature ranging between max 13.9°C (57°F) and min 8.7°C (47.7°F). The months with the most sunshine in Llanelli, United Kingdom, are April and May, with an average of 8.2h of sunshine.
May
Weather in May
The last month of the spring, May, is a mild month in Llanelli, United Kingdom, with an average temperature ranging between max 13.9°C (57°F) and min 8.7°C (47.7°F).Temperature
May's arrival shows an average high-temperature of a mild 13.9°C (57°F), hardly different from the previous month. The average temperature during May nights in Llanelli is registered at a chilly 8.7°C (47.7°F).Humidity
The average relative humidity in May in Llanelli is 82%.Rainfall
May is the month with the least rainfall in Llanelli. Rain falls for 15.9 days and accumulates 37mm (1.46") of precipitation.Snowfall
In Llanelli, snow does not fall in April through November.Sea temperature
In Llanelli, the average seawater temperature in May is 11.5°C (52.7°F).Note: One needs to be cautious in 11.5°C (52.7°F) waters. 13°C (55.4°F) is already forbidding, but sub-10°C (14°F) can seriously disrupt your breathing and lead to a frigid shock, considering one's well-being.
Daylight
In Llanelli, the average length of the day in May is 15h and 40min.On the first day of the month, sunrise is at 5:46 am and sunset at 8:40 pm. On the last day of May, in Llanelli, sunrise is at 5:04 am and sunset at 9:24 pm BST.
Sunshine
The months with the most sunshine in Llanelli are April and May, with an average of 8.2h 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 reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 4 during May morphs into the following directions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Llanelli, 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 month with the lowest average high temperature is February (7.7°C).
- Average low temperature in May: 8.7°C
The month with the highest average low temperature is August (13.6°C).
The coldest month (with the lowest average low temperature) is February (4.5°C).
Average pressure in May
Llanelli, 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
Llanelli, United Kingdom
- Average wind speed in May: 16.2km/h
The windiest month (with the highest average wind speed) is December (23.9km/h).
The calmest month (with the lowest average wind speed) is June (15.4km/h).
Average humidity in May
Llanelli, United Kingdom
- Average humidity in May: 82%
The months with the highest relative humidity are January, August, October, November and December (85%).
The month with the lowest relative humidity is April (81%).
Average rainfall in May
Llanelli, United Kingdom
- Average rainfall in May: 37mm
The wettest month (with the highest rainfall) is December (84mm).
The driest month (with the least rainfall) is May (37mm).
Average rainfall days in May
Llanelli, United Kingdom
- Average rainfall days in May: 15.9 days
The month with the highest number of rainy days is December (21.5 days).
The month with the least rainy days is April (15.1 days).
Average snowfall in May
Llanelli, 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
Llanelli, United Kingdom
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (1.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in May
Llanelli, 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
Llanelli, 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 12min
The months with the most sunshine are April and May (Average sunshine: 8h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Llanelli, United Kingdom
- Average sunshine days in May: 12.8 days
The month with the most sunshine days is May (12.8 days).
The month with the least sunshine days is August (6.5 days).
Average UV index in May
Llanelli, 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, November and December (UV index 2).
Average cloud cover in May
Llanelli, 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
Llanelli, United Kingdom
- Average visibility in May: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
