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
In December, the average high-temperature marginally decreases from a cool 10.5°C (50.9°F) in November to a frosty 7°C (44.6°F). The nighttime temperature demonstrates a marginal decline, averaging at a wintry 2.7°C (36.9°F) during December.Humidity
December is the most humid month, with an average relative humidity of 87%.Rainfall
In Héricy, during December, the rain falls for 17.5 days and regularly aggregates up to 59mm (2.32") of precipitation. Throughout the year, there are 194.1 rainfall days, and 555mm (21.85") of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall in Héricy, France. In Héricy, during December, snow falls for 2.3 days and regularly aggregates up to 21mm (0.83") of snow. Throughout the year, there are 11.2 snowfall days, and 86mm (3.39") of snow is accumulated.Daylight
With an average of 8h and 24min of daylight, December has the shortest days of the year in Héricy.On the first day of December in Héricy, sunrise is at 08:19 and sunset at 16:56. On the last day of the month, sunrise is at 08:40 and sunset at 17:03 CET.
Sunshine
The average sunshine in December in Héricy 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 value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Héricy in December?
What is the most humid month in Héricy?
What is the average humidity in December in Héricy?
How much does it rain in Héricy in December?
How many days does it snow in December in Héricy?
What is the month with the shortest days in Héricy?
What is the average length of the day in December in Héricy?
When are sunrise and sunset in December in Héricy?
How long on average sun shines in December in Héricy?
When is the lowest UV index in Héricy?
How high is the UV index in December in Héricy?
Average temperature in December
Héricy, France
- Average high temperature in December: 7°C
The warmest month (with the highest average high temperature) is August (24.8°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in December: 2.7°C
The month with the highest average low temperature is August (14.8°C).
The coldest month (with the lowest average low temperature) is January (1.5°C).
Average pressure in December
Héricy, France
- Average pressure in December: 1018.6mbar
The month with the highest atmospheric pressure is December (1018.6mbar).
The month with the lowest atmospheric pressure is November (1013.7mbar).
Average wind speed in December
Héricy, France
- Average wind speed in December: 15.1km/h
The windiest month (with the highest average wind speed) is February (15.5km/h).
The calmest month (with the lowest average wind speed) is August (9.9km/h).
Average humidity in December
Héricy, France
- Average humidity in December: 87%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is August (70%).
Average rainfall in December
Héricy, France
- Average rainfall in December: 59mm
The wettest month (with the highest rainfall) is June (64mm).
The driest month (with the least rainfall) is September (26mm).
Average rainfall days in December
Héricy, France
- Average rainfall days in December: 17.5 days
The months with the highest number of rainy days are May and June (18.7 days).
The month with the least rainy days is September (11.7 days).
Average snowfall in December
Héricy, France
- Average snowfall in December: 21mm
The month with the highest snowfall is January (33mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Héricy, France
- Average snowfall days in December: 2.3 days
The month with the highest number of snowfall days is January (3.7 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
Héricy, France
- Average daylight in December: 8h and 2min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is August (Average sunshine: 9h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Héricy, France
- Average sunshine days in December: 9 days
The month with the most sunshine days is September (15.1 days).
The month with the least sunshine days is June (8.2 days).
Average UV index in December
Héricy, France
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Héricy, France
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 36).
Average visibility in December
Héricy, France
- Average visibility in December: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October and December (9km).
The months with the lowest visibility are January and November (8km).
