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
As December begins, there is a minor decrease in the average high-temperature, softly falling from a moderate 13.5°C (56.3°F) in November to a cool 10.1°C (50.2°F). Grayssas temperatures generally rest at a low of 4.3°C (39.7°F) during the December nights.Humidity
In December, the average relative humidity in Grayssas is 84%.Rainfall
In Grayssas, in December, it is raining for 13.5 days, with typically 48mm (1.89") of accumulated precipitation. Throughout the year, there are 168.6 rainfall days, and 505mm (19.88") of precipitation is accumulated.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows in Grayssas, France. Throughout December, in the average 0.8 snowfall days, it receives 6mm (0.24") of snow. In Grayssas, during the entire year, snow falls for 3 days and aggregates up to 26mm (1.02") of snow.Daylight
The month with the shortest days is December, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 08:12 and sunset at 17:19. On the last day of December, in Grayssas, sunrise is at 08:31 and sunset at 17:27 CET.
Sunshine
In Grayssas, the average sunshine in December is 5.3h.UV index
In December, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: A maximum UV index of 3 in December translates into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat. Keep in mind! Snow's reflective quality 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 Grayssas?
What is the average humidity in December in Grayssas?
How many days does it rain in December in Grayssas?
When does it start snowing in Grayssas?
What is the month with the shortest days in Grayssas?
What is the average length of the day in December in Grayssas?
When are sunrise and sunset in December in Grayssas?
How many hours of sunshine does Grayssas have in December?
How high is the UV index in December in Grayssas?
Average temperature in December
Grayssas, France
- Average high temperature in December: 10.1°C
The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is January (8.9°C).
- Average low temperature in December: 4.3°C
The month with the highest average low temperature is August (16.1°C).
The coldest month (with the lowest average low temperature) is February (2.8°C).
Average pressure in December
Grayssas, France
- Average pressure in December: 1021.6mbar
The month with the highest atmospheric pressure is December (1021.6mbar).
The months with the lowest atmospheric pressure are April and November (1015.6mbar).
Average wind speed in December
Grayssas, France
- Average wind speed in December: 11km/h
The windiest month (with the highest average wind speed) is March (11.9km/h).
The calmest months (with the lowest average wind speed) are August and September (8.5km/h).
Average humidity in December
Grayssas, France
- Average humidity in December: 84%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (66%).
Average rainfall in December
Grayssas, France
- Average rainfall in December: 48mm
The wettest months (with the highest rainfall) are May and November (59mm).
The driest month (with the least rainfall) is September (20mm).
Average rainfall days in December
Grayssas, France
- Average rainfall days in December: 13.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is September (10 days).
Average snowfall in December
Grayssas, France
- Average snowfall in December: 6mm
The month with the highest snowfall is January (10mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Grayssas, France
- Average snowfall days in December: 0.8 days
The month with the highest number of snowfall days is February (1.3 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
Grayssas, France
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in December
Grayssas, France
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is September (17.5 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in December
Grayssas, France
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February and November (UV index 2).
Average cloud cover in December
Grayssas, France
- Average cloud cover in December: 45
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Grayssas, France
- Average visibility in December: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is January (8km).
