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
Upon the beginning of December, Llansteffan's high-temperatures register at a chilly 9.1°C (48.4°F), closely mirroring the preceding month. A slight dip in temperature to 6.5°C (43.7°F) marks the average nights in Llansteffan during December.Humidity
January, July through October and December, with an average relative humidity of 84%, are the most humid months.Rainfall
December is the month with the most rainfall. Rain falls for 17.1 days and accumulates 35mm (1.38") of precipitation.Snowfall
Months with snowfall are January, February and December. December is the first month it typically snows in Llansteffan. Throughout December, in the average 0.3 snowfall days, it receives 1mm (0.04") of snow. In Llansteffan, United Kingdom, during the entire year, snow falls for 2.5 days and aggregates up to 8mm (0.31") of snow.Sea temperature
In December, the average sea temperature is 11.3°C (52.3°F).Note: Diving into 11.3°C (52.3°F) when it's under 10°C (50°F) can cause immediate cold shock symptoms, marked by hyperventilation.
Daylight
The month with the shortest days in Llansteffan is December, with an average of 7h and 54min of daylight.On the first day of December in Llansteffan, United Kingdom, sunrise is at 8:02 am and sunset at 4:10 pm. On the last day of the month, sunrise is at 8:24 am and sunset at 4:17 pm GMT.
Sunshine
The average sunshine in December is 3.8h.UV index
The months with the lowest UV index in Llansteffan are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: In December, the maximum UV index of 2 suggests this advice:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
What is the usual temperature for Llansteffan in December?
What is the most humid month in Llansteffan?
What is the average humidity in December in Llansteffan?
What is the rainiest month in Llansteffan?
How much does it rain in Llansteffan in December?
When does it start snowing in Llansteffan?
How cold is the water in December in Llansteffan?
What is the month with the shortest days in Llansteffan?
What is the average length of the day in December in Llansteffan?
When are sunrise and sunset in December in Llansteffan?
How long on average sun shines in December in Llansteffan?
What are the months with the lowest UV index in Llansteffan?
How high is the UV index in December in Llansteffan?
Average temperature in December
Llansteffan, United Kingdom
- Average high temperature in December: 9.1°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 December: 6.5°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 December
Llansteffan, United Kingdom
- Average pressure in December: 1013.5mbar
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
Llansteffan, United Kingdom
- Average wind speed in December: 25.2km/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 December
Llansteffan, United Kingdom
- Average humidity in December: 84%
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 December
Llansteffan, United Kingdom
- Average rainfall in December: 35mm
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 December
Llansteffan, United Kingdom
- Average rainfall days in December: 17.1 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 December
Llansteffan, United Kingdom
- Average snowfall in December: 1mm
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 December
Llansteffan, United Kingdom
- Average snowfall days in December: 0.3 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 December
Llansteffan, 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
Llansteffan, 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 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Llansteffan, United Kingdom
- Average sunshine days in December: 10.5 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 December
Llansteffan, 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 and December (UV index 2).
Average cloud cover in December
Llansteffan, 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
Llansteffan, United Kingdom
- Average visibility in December: 10km
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).
Llansteffan, United Kingdom
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