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
With December's arrival, Harpenden's weather records an average high-temperature of a still frosty 7.2°C (45°F), marking little difference from November's 9.6°C (49.3°F). A mild drop to an average of 2.9°C (37.2°F) marks the nights in Harpenden during December.Humidity
The most humid month in Harpenden is December, with an average relative humidity of 90%.Rainfall
In Harpenden, in December, during 12.9 rainfall days, 34mm (1.34") of precipitation is typically accumulated. In Harpenden, during the entire year, the rain falls for 160.5 days and collects up to 325mm (12.8") of precipitation.Snowfall
Months with snowfall in Harpenden are January through April, November and December. In Harpenden, during December, snow falls for 2 days and regularly aggregates up to 19mm (0.75") of snow. Throughout the year, in Harpenden, there are 10.3 snowfall days, and 81mm (3.19") of snow is accumulated.Daylight
December has the shortest days of the year in Harpenden, 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 3:54 pm. On the last day of December, in Harpenden, sunrise is at 8:08 am and sunset at 4:00 pm GMT.
Sunshine
The average sunshine in December in Harpenden is 4.2h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Harpenden in December?
What is the most humid month in Harpenden?
What is the average humidity in December in Harpenden?
How much does it rain in Harpenden in December?
How many days does it snow in December in Harpenden?
What is the month with the shortest days in Harpenden?
What is the average length of the day in December in Harpenden?
What time are sunrise and sunset in December in Harpenden?
How long on average sun shines in December in Harpenden?
What are the months with the lowest UV index in Harpenden?
What is the UV index intensity in December in Harpenden?
Average temperature in December
Harpenden, United Kingdom
- Average high temperature in December: 7.2°C
The warmest month (with the highest average high temperature) is July (21.3°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 (13.2°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).
Average pressure in December
Harpenden, United Kingdom
- Average pressure in December: 1014mbar
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
Harpenden, United Kingdom
- Average wind speed in December: 18.4km/h
The windiest months (with the highest average wind speed) are February and December (18.4km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).
Average humidity in December
Harpenden, 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 (77%).
Average rainfall in December
Harpenden, United Kingdom
- Average rainfall in December: 34mm
The wettest month (with the highest rainfall) is June (43mm).
The driest month (with the least rainfall) is September (19mm).
Average rainfall days in December
Harpenden, United Kingdom
- Average rainfall days in December: 12.9 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is February (10.8 days).
Average snowfall in December
Harpenden, United Kingdom
- Average snowfall in December: 19mm
The month with the highest snowfall is February (29mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Harpenden, United Kingdom
- Average snowfall days in December: 2 days
The month with the highest number of snowfall days is February (3.6 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
Harpenden, 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 1min
The months with the most sunshine are July and August (Average sunshine: 7h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in December
Harpenden, United Kingdom
- Average sunshine days in December: 13.5 days
The month with the most sunshine days is March (15.1 days).
The month with the least sunshine days is July (9.7 days).
Average UV index in December
Harpenden, United Kingdom
- Average UV index in December: 2
The month with the highest UV index is 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
Harpenden, United Kingdom
- Average cloud cover in December: 58
The months with the most cloud cover are February and November (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 49).
Average visibility in December
Harpenden, United Kingdom
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
The month with the lowest visibility is November (8km).
