December weather forecastKillay, United Kingdom
December
Weather in December
The first month of the winter, December, is still a chilly month in Killay, United Kingdom, with an average temperature varying between 9.2°C (48.6°F) and 6.5°C (43.7°F).Temperature
The onset of December brings an average high-temperature of a frosty 9.2°C (48.6°F), nearly matching the November temperature. Killay's nights in December maintain a consistent average of 6.5°C (43.7°F), demonstrating a minimal differential from its daytime temperature.Humidity
The months with the highest humidity are January, August and December, with an average relative humidity of 84%.Rainfall
The month with the most rainfall in Killay is December, when the rain falls for 21.4 days and typically aggregates up to 101mm (3.98") of precipitation.Snowfall
Months with snowfall in Killay are January through March and December. December is the month with the most snowfall in Killay. Snow falls for 1.1 days and accumulates 8mm (0.31") of snow.Daylight
The month with the shortest days in Killay is December, with an average of 7h and 54min of daylight.On the first day of December, sunrise is at 8:00 am and sunset at 4:09 pm. On the last day of the month, sunrise is at 8:22 am and sunset at 4:16 pm GMT.
Sunshine
The average sunshine in December is 3.9h.UV index
The months with the lowest UV index in Killay, United Kingdom, are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 2 during December translates into the following directions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Direct Sun exposure should be minimized especially during midday when radiation is most intense. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Killay, United Kingdom
- Average high temperature in December: 9.2°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 (7.8°C).
- Average low temperature in December: 6.5°C
The month with the highest average low temperature is August (14.1°C).
The coldest month (with the lowest average low temperature) is February (5°C).
Average pressure in December
Killay, United Kingdom
- Average pressure in December: 1013.7mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.8mbar).
Average wind speed in December
Killay, United Kingdom
- Average wind speed in December: 25.7km/h
The windiest month (with the highest average wind speed) is December (25.7km/h).
The calmest month (with the lowest average wind speed) is June (16.4km/h).
Average humidity in December
Killay, United Kingdom
- Average humidity in December: 84%
The months with the highest relative humidity are January, August and December (84%).
The month with the lowest relative humidity is April (80%).
Average rainfall in December
Killay, United Kingdom
- Average rainfall in December: 101mm
The wettest month (with the highest rainfall) is December (101mm).
The driest month (with the least rainfall) is May (37mm).
Average rainfall days in December
Killay, United Kingdom
- Average rainfall days in December: 21.4 days
The month with the highest number of rainy days is December (21.4 days).
The month with the least rainy days is April (14.4 days).
Average snowfall in December
Killay, 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
Killay, United Kingdom
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is December (1.1 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
Killay, United Kingdom
- Average daylight in December: 7h and 54min
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 54min
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
Killay, United Kingdom
- Average sunshine days in December: 6.6 days
The month with the most sunshine days is May (13 days).
The month with the least sunshine days is December (6.6 days).
Average UV index in December
Killay, 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
Killay, 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 45).
Average visibility in December
Killay, United Kingdom
- Average visibility in December: 9km
The months with the highest visibility are March, April, June, July and October (10km).
The months with the lowest visibility are January, February, May, August, September, November and December (9km).
