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
Hemel Hempstead transitions into December recording an average high-temperature of a still frosty 7.3°C (45.1°F), closely aligning with the preceding month's temperature. A minor drop in temperature is observed from daytime highs during the nights of December, averaging a cold 2.9°C (37.2°F).Humidity
With an average relative humidity of 90%, December is the most humid month in Hemel Hempstead, United Kingdom.Rainfall
In December, the rain falls for 12.3 days. Throughout December, 38mm (1.5") of precipitation is accumulated. In Hemel Hempstead, during the entire year, the rain falls for 159.2 days and collects up to 359mm (14.13") of precipitation.Snowfall
Months with snowfall in Hemel Hempstead are January through March, November and December. The month with the most snowfall in Hemel Hempstead, United Kingdom, is December, when snow falls for 2 days and typically aggregates up to 20mm (0.79") of snow.Daylight
The month with the shortest days is December, with an average of 7h and 54min of daylight.On the first day of December, sunrise is at 7:46 am and sunset at 3:55 pm. On the last day of the month, sunrise is at 8:08 am and sunset at 4:01 pm GMT.
Sunshine
In Hemel Hempstead, United Kingdom, the average sunshine in December is 4.4h.UV index
The months with the lowest UV index in Hemel Hempstead are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability 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:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Hemel Hempstead?
What is the most humid month in Hemel Hempstead?
What is the average humidity in December in Hemel Hempstead?
How much does it rain in Hemel Hempstead in December?
When does it snow the most in Hemel Hempstead?
How much does it snow in Hemel Hempstead in December?
What is the month with the shortest days in Hemel Hempstead?
How many hours of daylight does Hemel Hempstead have in December?
What time are sunrise and sunset in December in Hemel Hempstead?
How long on average sun shines in December in Hemel Hempstead?
What are the months with the lowest UV index in Hemel Hempstead?
What is the UV index intensity in December in Hemel Hempstead?
Average temperature in December
Hemel Hempstead, United Kingdom
- Average high temperature in December: 7.3°C
The warmest month (with the highest average high temperature) is July (21.6°C).
The month with the lowest average high temperature is January (6.4°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
Hemel Hempstead, United Kingdom
- Average pressure in December: 1014.2mbar
The month with the highest atmospheric pressure is September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010.4mbar).
Average wind speed in December
Hemel Hempstead, United Kingdom
- Average wind speed in December: 18km/h
The windiest month (with the highest average wind speed) is February (18.2km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).
Average humidity in December
Hemel Hempstead, 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 (76%).
Average rainfall in December
Hemel Hempstead, United Kingdom
- Average rainfall in December: 38mm
The wettest month (with the highest rainfall) is June (44mm).
The driest month (with the least rainfall) is September (19mm).
Average rainfall days in December
Hemel Hempstead, United Kingdom
- Average rainfall days in December: 12.3 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is September (10.7 days).
Average snowfall in December
Hemel Hempstead, United Kingdom
- Average snowfall in December: 20mm
The month with the highest snowfall is December (20mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Hemel Hempstead, United Kingdom
- Average snowfall days in December: 2 days
The month with the highest number of snowfall days is February (3.5 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
Hemel Hempstead, 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: 8h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in December
Hemel Hempstead, United Kingdom
- Average sunshine days in December: 15.4 days
The month with the most sunshine days is September (17.1 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in December
Hemel Hempstead, 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, March, November and December (UV index 2).
Average cloud cover in December
Hemel Hempstead, United Kingdom
- Average cloud cover in December: 58
The months with the most cloud cover are February and November (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 48).
Average visibility in December
Hemel Hempstead, 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).
