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 an average high-temperature of a still chilly 7.2°C (45°F), indicating a minor variance from the prior month. Nights during December maintain a steady temperature, averaging at a wintry 2.9°C (37.2°F).Humidity
With an average relative humidity of 90%, December is the most humid month in Welwyn, United Kingdom.Rainfall
In Welwyn, during December, the rain falls for 12.4 days and regularly aggregates up to 29mm (1.14") of precipitation. In Welwyn, during the entire year, the rain falls for 153.2 days and collects up to 278mm (10.94") of precipitation.Snowfall
January through March, November and December are months with snowfall. In Welwyn, in December, snow falls for 2.1 days, with typically accumulated 14mm (0.55") of snow. In Welwyn, during the entire year, snow falls for 10 days and aggregates up to 51mm (2.01") of snow.Daylight
December has the shortest days of the year, with an average of 7h and 54min of daylight.On the first day of the month, sunrise is at 7:46 am and sunset at 3:53 pm. On the last day of December, sunrise is at 8:07 am and sunset at 4:00 pm GMT.
Sunshine
In December, the average sunshine in Welwyn is 4.3h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Welwyn, United Kingdom. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Welwyn?
What is the most humid month in Welwyn?
What is the average humidity in December in Welwyn?
How many days does it rain in December in Welwyn?
How much does it snow in Welwyn in December?
What is the month with the shortest days in Welwyn?
What is the average length of the day in December in Welwyn?
When is the sunrise / sunset in December in Welwyn?
How many hours of sunshine does Welwyn have in December?
When is the lowest UV index in Welwyn?
How high is the UV index in December in Welwyn?
Average temperature in December
Welwyn, United Kingdom
- Average high temperature in December: 7.2°C
The warmest month (with the highest average high temperature) is July (21.4°C).
The month with the lowest average high temperature is January (6.3°C).
- Average low temperature in December: 2.9°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).
Average pressure in December
Welwyn, United Kingdom
- Average pressure in December: 1014.1mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1010.3mbar).
Average wind speed in December
Welwyn, United Kingdom
- Average wind speed in December: 18.2km/h
The windiest month (with the highest average wind speed) is February (18.3km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).
Average humidity in December
Welwyn, United Kingdom
- Average humidity in December: 90%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (75%).
Average rainfall in December
Welwyn, United Kingdom
- Average rainfall in December: 29mm
The wettest month (with the highest rainfall) is June (36mm).
The driest month (with the least rainfall) is September (15mm).
Average rainfall days in December
Welwyn, United Kingdom
- Average rainfall days in December: 12.4 days
The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is September (10.5 days).
Average snowfall in December
Welwyn, United Kingdom
- Average snowfall in December: 14mm
The month with the highest snowfall is February (16mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Welwyn, United Kingdom
- Average snowfall days in December: 2.1 days
The month with the highest number of snowfall days is February (3.3 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
Welwyn, 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: 4h and 2min
The months with the most sunshine are July and August (Average sunshine: 7h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in December
Welwyn, United Kingdom
- Average sunshine days in December: 14.7 days
The month with the most sunshine days is September (16.5 days).
The month with the least sunshine days is July (11.1 days).
Average UV index in December
Welwyn, United Kingdom
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Welwyn, United Kingdom
- Average cloud cover in December: 58
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 48).
Average visibility in December
Welwyn, 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).
