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
December
Weather in December
Temperature
The transition from November to December sees average high-temperatures adjusting to a frosty 8.4°C (47.1°F), from a not significantly different 10°C (50°F). Cwmann, during December nights, records a temperature marginally cooler than the daytime average, at an icy 5.3°C (41.5°F).Humidity
January, August, September and December, with an average relative humidity of 86%, are the most humid months in Cwmann.Rainfall
The wettest months in Cwmann are November and December, with an average 92mm (3.62") of rainfall.Snowfall
January through April and December are months with snowfall. The months with the most snowfall in Cwmann are January and December, with an average 9mm (0.35") of accumulated snow.Daylight
December has the shortest days of the year in Cwmann, United Kingdom, with an average of 7h and 48min of daylight.On the first day of December in Cwmann, sunrise is at 8:03 am and sunset at 4:07 pm. On the last day of the month, sunrise is at 8:24 am and sunset at 4:14 pm GMT.
Sunshine
In December, the average sunshine 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 Cwmann. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 2 during December translates into the following directions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Experience reduced UV exposure by about half when donning a wide-brim hat. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Cwmann?
What is the most humid month in Cwmann?
What is the average humidity in December in Cwmann?
What is the wettest month in Cwmann?
How much does it rain in Cwmann in December?
When does it snow the most in Cwmann?
When does it start snowing in Cwmann?
What is the month with the shortest days in Cwmann?
What is the average length of the day in December in Cwmann?
When are sunrise and sunset in December in Cwmann?
How long on average sun shines in December in Cwmann?
What are the months with the lowest UV index in Cwmann?
What is the UV index reading in December in Cwmann?
Average temperature in December
Cwmann, United Kingdom
- Average high temperature in December: 8.4°C
The warmest month (with the highest average high temperature) is July (17.3°C).
The months with the lowest average high temperature are January and February (7.3°C).
- Average low temperature in December: 5.3°C
The month with the highest average low temperature is August (12.6°C).
The coldest month (with the lowest average low temperature) is February (3.8°C).
Average pressure in December
Cwmann, United Kingdom
- Average pressure in December: 1013mbar
The month with the highest atmospheric pressure is May (1016.5mbar).
The month with the lowest atmospheric pressure is November (1009.4mbar).
Average wind speed in December
Cwmann, United Kingdom
- Average wind speed in December: 23.8km/h
The windiest month (with the highest average wind speed) is December (23.8km/h).
The calmest month (with the lowest average wind speed) is June (14.8km/h).
Average humidity in December
Cwmann, United Kingdom
- Average humidity in December: 86%
The months with the highest relative humidity are January, August, September and December (86%).
The month with the lowest relative humidity is April (82%).
Average rainfall in December
Cwmann, United Kingdom
- Average rainfall in December: 92mm
The wettest months (with the highest rainfall) are November and December (92mm).
The driest month (with the least rainfall) is May (37mm).
Average rainfall days in December
Cwmann, United Kingdom
- Average rainfall days in December: 21.7 days
The months with the highest number of rainy days are November and December (21.7 days).
The month with the least rainy days is April (15.8 days).
Average snowfall in December
Cwmann, United Kingdom
- Average snowfall in December: 9mm
The months with the highest snowfall are January and December (9mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Cwmann, United Kingdom
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is January (1.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Cwmann, United Kingdom
- Average daylight in December: 7h and 5min
The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is May (Average sunshine: 8h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Cwmann, United Kingdom
- Average sunshine days in December: 5.7 days
The month with the most sunshine days is May (12.9 days).
The month with the least sunshine days is December (5.7 days).
Average UV index in December
Cwmann, 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
Cwmann, United Kingdom
- Average cloud cover in December: 64
The month with the most cloud cover is December (Cloud cover 64).
The months with the least cloud cover are April and May (Cloud cover 48).
Average visibility in December
Cwmann, 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).
