December weather forecastRoy-Boissy, France
December
Weather in December
December, the first month of the winter in Roy-Boissy, is also a frosty month, with temperature in the range of an average low of 2.5°C (36.5°F) and an average high of 6.7°C (44.1°F).Temperature
The shift from November to December coincides with a small decrease in the average high-temperature, down to a still chilly 6.7°C (44.1°F) from a frosty 9.9°C (49.8°F). Registering an almost steady temperature, Roy-Boissy's nights in December see an average low of 2.5°C (36.5°F).Humidity
December is the most humid month in Roy-Boissy, with an average relative humidity of 89%.Rainfall
The month with the most rainfall is December, when the rain falls for 15.9 days and typically aggregates up to 55mm (2.17") of precipitation.Snowfall
January through March, November and December are months with snowfall in Roy-Boissy, France. In Roy-Boissy, in December, snow falls for 2.4 days, with typically accumulated 21mm (0.83") of snow. In Roy-Boissy, France, during the entire year, snow falls for 8.8 days and aggregates up to 72mm (2.83") of snow.Daylight
December has the shortest days of the year in Roy-Boissy, with an average of 8h and 12min of daylight.On the first day of December in Roy-Boissy, sunrise is at 08:27 and sunset at 16:55. On the last day of the month, sunrise is at 08:48 and sunset at 17:02 CET.
Sunshine
In Roy-Boissy, the average sunshine in December is 3.9h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Roy-Boissy. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: An average maximum UV index of 2 in December leads to these recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Roy-Boissy, France
- Average high temperature in December: 6.7°C
The warmest month (with the highest average high temperature) is August (22.9°C).
The month with the lowest average high temperature is January (5.5°C).
- Average low temperature in December: 2.5°C
The month with the highest average low temperature is August (13.1°C).
The coldest month (with the lowest average low temperature) is January (1°C).
Average pressure in December
Roy-Boissy, France
- Average pressure in December: 1017.5mbar
The month with the highest atmospheric pressure is September (1018mbar).
The month with the lowest atmospheric pressure is November (1012.8mbar).
Average wind speed in December
Roy-Boissy, France
- Average wind speed in December: 17.1km/h
The windiest month (with the highest average wind speed) is February (17.5km/h).
The calmest month (with the lowest average wind speed) is August (11.2km/h).
Average humidity in December
Roy-Boissy, France
- Average humidity in December: 89%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is August (76%).
Average rainfall in December
Roy-Boissy, France
- Average rainfall in December: 55mm
The wettest month (with the highest rainfall) is December (55mm).
The driest month (with the least rainfall) is September (21mm).
Average rainfall days in December
Roy-Boissy, France
- Average rainfall days in December: 15.9 days
The month with the highest number of rainy days is July (18.2 days).
The month with the least rainy days is February (11.3 days).
Average snowfall in December
Roy-Boissy, France
- Average snowfall in December: 21mm
The month with the highest snowfall is January (23mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Roy-Boissy, France
- Average snowfall days in December: 2.4 days
The month with the highest number of snowfall days is February (2.7 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
Roy-Boissy, France
- Average daylight in December: 8h and 12min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in December: 3h and 54min
The month with the most sunshine is June (Average sunshine: 8h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Roy-Boissy, France
- Average sunshine days in December: 10.6 days
The month with the most sunshine days is March (15.7 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in December
Roy-Boissy, 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
Roy-Boissy, France
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are August and September (Cloud cover 43).
Average visibility in December
Roy-Boissy, France
- Average visibility in December: 9km
The months with the highest visibility are February, March, April, June, July, August, September, October and December (9km).
The months with the lowest visibility are January, May and November (8km).
