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 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's advent denotes a minor fluctuation in the average high-temperature to a still frosty 7.8°C (46°F) from November's 9.7°C (49.5°F). A steady low-temperature average of 4.7°C (40.5°F) is logged in Castlewellan during December, reflecting a modest dip from daytime readings.Humidity
The average relative humidity in December is 86%.Rainfall
In Castlewellan, United Kingdom, during December, the rain falls for 13.7 days and regularly aggregates up to 43mm (1.69") of precipitation. Throughout the year, in Castlewellan, there are 181.5 rainfall days, and 542mm (21.34") of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall in Castlewellan. In Castlewellan, during December, snow falls for 1.1 days and regularly aggregates up to 6mm (0.24") of snow. In Castlewellan, during the entire year, snow falls for 6.1 days and aggregates up to 31mm (1.22") of snow.Daylight
With an average of 7h and 24min of daylight, December has the shortest days of the year in Castlewellan.On the first day of December, sunrise is at 8:21 am and sunset at 4:04 pm. On the last day of the month, sunrise is at 8:44 am and sunset at 4:09 pm GMT.
Sunshine
The average sunshine in December is 4.3h.UV index
The months with the lowest UV index in Castlewellan are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: An average UV index of 2 in December transforms into this advice:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What is the usual temperature for Castlewellan in December?
What is the average humidity in December in Castlewellan?
How much does it rain in Castlewellan in December?
How many days does it snow in December in Castlewellan?
What is the month with the shortest days in Castlewellan?
How many hours of daylight does Castlewellan have in December?
When are sunrise and sunset in December in Castlewellan?
How many hours of sunshine does Castlewellan have in December?
What is the month with the lowest UV index in Castlewellan?
What is the UV index intensity in December in Castlewellan?
Average temperature in December
Castlewellan, United Kingdom
- Average high temperature in December: 7.8°C
The warmest months (with the highest average high temperature) are July and August (16.6°C).
The month with the lowest average high temperature is February (7.1°C).
- Average low temperature in December: 4.7°C
The months with the highest average low temperature are July and August (12.1°C).
The coldest month (with the lowest average low temperature) is February (3.9°C).
Average pressure in December
Castlewellan, United Kingdom
- Average pressure in December: 1009.9mbar
The month with the highest atmospheric pressure is May (1015.7mbar).
The month with the lowest atmospheric pressure is November (1007.6mbar).
Average wind speed in December
Castlewellan, United Kingdom
- Average wind speed in December: 24.4km/h
The windiest month (with the highest average wind speed) is December (24.4km/h).
The calmest month (with the lowest average wind speed) is July (15km/h).
Average humidity in December
Castlewellan, United Kingdom
- Average humidity in December: 86%
The month with the highest relative humidity is August (87%).
The months with the lowest relative humidity are March, April and May (83%).
Average rainfall in December
Castlewellan, United Kingdom
- Average rainfall in December: 43mm
The wettest month (with the highest rainfall) is November (68mm).
The driest month (with the least rainfall) is May (32mm).
Average rainfall days in December
Castlewellan, United Kingdom
- Average rainfall days in December: 13.7 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is September (11.5 days).
Average snowfall in December
Castlewellan, United Kingdom
- Average snowfall in December: 6mm
The month with the highest snowfall is January (9mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Castlewellan, United Kingdom
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Castlewellan, United Kingdom
- Average daylight in December: 7h and 2min
The month with the longest days is June (Average daylight: 17h and 6min).
The month with the shortest days is December (Average daylight: 7h and 24min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 7h and 48min).
The months with the least sunshine are January and February (Average sunshine: 3h and 54min).
Average sunshine days in December
Castlewellan, United Kingdom
- Average sunshine days in December: 14.8 days
The month with the most sunshine days is September (15.7 days).
The month with the least sunshine days is July (9.2 days).
Average UV index in December
Castlewellan, United Kingdom
- Average UV index in December: 2
The months with the highest UV index are June, 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
Castlewellan, United Kingdom
- Average cloud cover in December: 56
The months with the most cloud cover are January and February (Cloud cover 60).
The month with the least cloud cover is April (Cloud cover 51).
Average visibility in December
Castlewellan, United Kingdom
- Average visibility in December: 10km
The months with the highest visibility are February, March, September, October, November and December (10km).
The months with the lowest visibility are January, April, May, June, July and August (9km).
Castlewellan, United Kingdom
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