December weather forecastRoullens, France
December
Weather in December
December, the first month of the winter in Roullens, is also a frosty month, with an average temperature ranging between min 3.5°C (38.3°F) and max 9.4°C (48.9°F).Temperature
The onset of December entails a subtle temperature shift, as the average high-temperature eases from a cool 12.4°C (54.3°F) in November to a chilly 9.4°C (48.9°F). Nighttime temperatures hover around an average low of 3.5°C (38.3°F) in December.Humidity
January, November and December, with an average relative humidity of 81%, are the most humid months in Roullens.Rainfall
In Roullens, France, during December, the rain falls for 10.9 days and regularly aggregates up to 24mm (0.94") of precipitation. Throughout the year, in Roullens, there are 137.8 rainfall days, and 335mm (13.19") of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall in Roullens. In Roullens, in December, during 1.4 snowfall days, 7mm (0.28") of snow is typically accumulated. Throughout the year, in Roullens, there are 6.8 snowfall days, and 40mm (1.57") of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Roullens.On the first day of December, sunrise is at 08:03 and sunset at 17:16. On the last day of the month, sunrise is at 08:22 and sunset at 17:25 CET.
Sunshine
In Roullens, the average sunshine in December is 6h.UV index
In Roullens, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: In December, an average UV index of 3 transforms into the following instructions:
Take necessary precautions - Protection from skin and eye injury is mandatory. The Sun's radiation is especially intense around midday; try to stay in shade during this period. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Roullens, France
- Average high temperature in December: 9.4°C
The warmest month (with the highest average high temperature) is August (27.8°C).
The month with the lowest average high temperature is January (8.1°C).
- Average low temperature in December: 3.5°C
The month with the highest average low temperature is August (15.4°C).
The coldest month (with the lowest average low temperature) is February (1.7°C).
Average pressure in December
Roullens, France
- Average pressure in December: 1021.3mbar
The month with the highest atmospheric pressure is December (1021.3mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in December
Roullens, France
- Average wind speed in December: 13.6km/h
The windiest month (with the highest average wind speed) is February (15.3km/h).
The calmest month (with the lowest average wind speed) is September (11.2km/h).
Average humidity in December
Roullens, France
- Average humidity in December: 81%
The months with the highest relative humidity are January, November and December (81%).
The month with the lowest relative humidity is August (65%).
Average rainfall in December
Roullens, France
- Average rainfall in December: 24mm
The wettest month (with the highest rainfall) is October (43mm).
The driest months (with the least rainfall) are August and September (16mm).
Average rainfall days in December
Roullens, France
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is April (13.5 days).
The month with the least rainy days is August (8.8 days).
Average snowfall in December
Roullens, France
- Average snowfall in December: 7mm
The month with the highest snowfall is February (13mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Roullens, France
- Average snowfall days in December: 1.4 days
The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Roullens, France
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 6h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in December
Roullens, France
- Average sunshine days in December: 14 days
The month with the most sunshine days is August (18.3 days).
The month with the least sunshine days is November (12.5 days).
Average UV index in December
Roullens, 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
Roullens, France
- Average cloud cover in December: 37
The month with the most cloud cover is January (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in December
Roullens, France
- Average visibility in December: 9km
The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (9km).
