December weather forecast
Ystradfellte, United Kingdom

December

Weather in December

December, the first month of the winter in Ystradfellte, is also a frosty month, with an average temperature varying between 2.5°C (36.5°F) and 6.6°C (43.9°F).

Temperature

As December takes its course, Ystradfellte's average high-temperature registers at a still frosty 6.6°C (43.9°F), closely aligning with the preceding month. December nights cool to an average low-temperature of 2.5°C (36.5°F), a marginal decrease from its daytime equivalent.

Humidity

The months with the highest humidity are November and December, with an average relative humidity of 92%.

Rainfall

December is the month with the most rainfall in Ystradfellte. Rain falls for 17.7 days and accumulates 79mm (3.11") of precipitation.

Snowfall

January through May, November and December are months with snowfall in Ystradfellte. In Ystradfellte, during December, snow falls for 2.8 days and regularly aggregates up to 30mm (1.18") of snow. Throughout the year, in Ystradfellte, there are 17.5 snowfall days, and 205mm (8.07") of snow is accumulated.

Daylight

December has the shortest days of the year in Ystradfellte, with an average of 7h and 54min of daylight.
On the first day of December in Ystradfellte, sunrise is at 7:59 am and sunset at 4:07 pm. On the last day of the month, sunrise is at 8:21 am and sunset at 4:13 pm GMT.

Sunshine

In December, the average sunshine in Ystradfellte is 3h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 2 during December leads to these advisories:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.

Frequently asked questions

How cold is December in Ystradfellte?
The high-temperature in Ystradfellte, United Kingdom, during December is 6.6°C (43.9°F) and the low-temperature is 2.5°C (36.5°F).
What is the most humid month in Ystradfellte?
November and December, with an average relative humidity of 92%, are most humid months.
What is the average humidity in December in Ystradfellte?
In Ystradfellte, United Kingdom, the average relative humidity in December is 92%.
What is the rainiest month in Ystradfellte?
The month with the most rainfall in Ystradfellte is December, when the rain falls for 17.7 days and typically aggregates up to 79mm (3.11") of precipitation.
How many days does it rain in December in Ystradfellte?
In Ystradfellte, United Kingdom, in December, during 17.7 rainfall days, 79mm (3.11") of precipitation is typically accumulated.
How much does it snow in Ystradfellte in December?
In Ystradfellte, United Kingdom, during December, snow falls for 2.8 days and regularly aggregates up to 30mm (1.18") of snow.
What is the month with the shortest days in Ystradfellte?
The month with the shortest days is December, with an average of 7h and 54min of daylight.
How many hours of daylight does Ystradfellte have in December?
The average day length in December is 7h and 53min.
When is the sunrise / sunset in December in Ystradfellte?
In December, on the first day of the month, sunrise is at 7:59 am and sunset at 4:07 pm. On the last day of the month, in Ystradfellte, United Kingdom, sunrise is at 8:21 am and sunset at 4:13 pm GMT.
How long on average sun shines in December in Ystradfellte?
In Ystradfellte, the average sunshine duration in December is 3h.
When is the lowest UV index in Ystradfellte?
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
How high is the UV index in December in Ystradfellte?
In Ystradfellte, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in December
Ystradfellte, United Kingdom
  • Average high temperature in December: 6.6°C

The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is January (5.7°C).

  • Average low temperature in December: 2.5°C

The month with the highest average low temperature is August (10.8°C).
The coldest month (with the lowest average low temperature) is February (1.3°C).

Average pressure in December
Ystradfellte, United Kingdom
  • Average pressure in December: 1013.5mbar

The month with the highest atmospheric pressure is May (1016.6mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).

Average wind speed in December
Ystradfellte, United Kingdom
  • Average wind speed in December: 19.1km/h

The windiest month (with the highest average wind speed) is February (19.6km/h).
The calmest month (with the lowest average wind speed) is June (13.3km/h).

Average humidity in December
Ystradfellte, United Kingdom
  • Average humidity in December: 92%

The months with the highest relative humidity are November and December (92%).
The month with the lowest relative humidity is April (84%).

Average rainfall in December
Ystradfellte, United Kingdom
  • Average rainfall in December: 79mm

The wettest month (with the highest rainfall) is December (79mm).
The driest month (with the least rainfall) is May (37mm).

Average rainfall days in December
Ystradfellte, United Kingdom
  • Average rainfall days in December: 17.7 days

The month with the highest number of rainy days is July (19.1 days).
The month with the least rainy days is February (12.5 days).

Average snowfall in December
Ystradfellte, United Kingdom
  • Average snowfall in December: 30mm

The month with the highest snowfall is January (41mm).
The months with the least snowfall are June, July, August, September and October (0mm).

Average snowfall days in December
Ystradfellte, United Kingdom
  • Average snowfall days in December: 2.8 days

The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Ystradfellte, 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 0min

The month with the most sunshine is May (Average sunshine: 6h and 30min).
The month with the least sunshine is November (Average sunshine: 2h and 54min).

Average sunshine days in December
Ystradfellte, United Kingdom
  • Average sunshine days in December: 9.9 days

The month with the most sunshine days is March (13.3 days).
The month with the least sunshine days is November (9 days).

Average UV index in December
Ystradfellte, United Kingdom
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in December
Ystradfellte, United Kingdom
  • Average cloud cover in December: 71

The month with the most cloud cover is November (Cloud cover 73).
The month with the least cloud cover is April (Cloud cover 58).

Average visibility in December
Ystradfellte, United Kingdom
  • Average visibility in December: 8km

The months with the highest visibility are February and March (9km).
The month with the lowest visibility is September (7km).

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