Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December brings a marginal elevation to a chilly 8.7°C (47.7°F) from November's 10.5°C (50.9°F) in Llanelli's average high-temperatures. An average temperature of 6.1°C (43°F) is logged during the nights of December in Llanelli, a small step down from daytime highs.Humidity
The months with the highest humidity are January, August, October through December, with an average relative humidity of 85%.Rainfall
December is the month with the most rainfall in Llanelli, United Kingdom. Rain falls for 21.5 days and accumulates 84mm (3.31") of precipitation.Snowfall
January through March and December are months with snowfall in Llanelli. The month with the most snowfall is December, when snow falls for 0.9 days and typically aggregates up to 8mm (0.31") of snow.Sea temperature
In Llanelli, the average seawater temperature in December is 11.3°C (52.3°F).Note: It is life-risking to swim in 11.3°C (52.3°F). Briefly staying in 13°C (55.4°F) waters feels unsettling, and temperatures below 10°C (50°F) might result in cold shock and loss of breath control, hinging on personal endurance.
Daylight
With an average of 7h and 54min of daylight, December has the shortest days of the year in Llanelli.On the first day of December, sunrise is at 8:01 am and sunset at 4:10 pm. On the last day of the month, sunrise is at 8:23 am and sunset at 4:16 pm GMT.
Sunshine
In December, the average sunshine in Llanelli is 3.8h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Llanelli. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 2 during December translates into the following guidance:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
What are December temperatures in Llanelli?
What are the most humid months in Llanelli?
What is the average humidity in December in Llanelli?
What is the wettest month in Llanelli?
How many days does it rain in December in Llanelli?
When does it snow the most in Llanelli?
When does it start to snow in Llanelli?
How cold is the water in December in Llanelli?
What is the month with the shortest days in Llanelli?
What is the average length of the day in December in Llanelli?
When are sunrise and sunset in December in Llanelli?
How long on average sun shines in December in Llanelli?
When is the lowest UV index in Llanelli?
What is the UV index reading in December in Llanelli?
Average temperature in December
Llanelli, United Kingdom
- Average high temperature in December: 8.7°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 December: 6.1°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 December
Llanelli, United Kingdom
- Average pressure in December: 1013.6mbar
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 December
Llanelli, United Kingdom
- Average wind speed in December: 23.9km/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 December
Llanelli, United Kingdom
- Average humidity in December: 85%
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 December
Llanelli, United Kingdom
- Average rainfall in December: 84mm
The wettest month (with the highest rainfall) is December (84mm).
The driest month (with the least rainfall) is May (37mm).
Average rainfall days in December
Llanelli, United Kingdom
- Average rainfall days in December: 21.5 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 December
Llanelli, United Kingdom
- Average snowfall in December: 8mm
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 December
Llanelli, United Kingdom
- Average snowfall days in December: 0.9 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 December
Llanelli, United Kingdom
- Average sea temperature in December: 11.3°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 December /
Average sunshine in December
Llanelli, United Kingdom
- Average daylight in December: 7h and 5min
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 December: 3h and 5min
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 December
Llanelli, United Kingdom
- Average sunshine days in December: 7 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 December
Llanelli, United Kingdom
- Average UV index in December: 2
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 December
Llanelli, United Kingdom
- Average cloud cover in December: 63
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 December
Llanelli, United Kingdom
- Average visibility in December: 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).
Llanelli, United Kingdom
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