December weather forecastMerris, France
December
Weather in December
The first month of the winter, December, is still a chilly month in Merris, France, with an average temperature ranging between min 3.4°C (38.1°F) and max 7.2°C (45°F).Temperature
The commencement of December notes an average high-temperature of a frosty 7.2°C (45°F), exhibiting little difference from the previous month. The nighttime temperature in December experiences a minor dip, averaging an icy 3.4°C (38.1°F).Humidity
December is the most humid month in Merris, with an average relative humidity of 87%.Rainfall
December is the month with the most rainfall. Rain falls for 18 days and accumulates 61mm (2.4") of precipitation.Snowfall
January through March, November and December are months with snowfall in Merris. In Merris, during December, snow falls for 2.5 days and regularly aggregates up to 26mm (1.02") of snow. In Merris, during the entire year, snow falls for 11.4 days and aggregates up to 91mm (3.58") of snow.Daylight
December has the shortest days of the year in Merris, with an average of 8h and 6min of daylight.On the first day of December, sunrise is at 08:29 and sunset at 16:47. On the last day of the month, sunrise is at 08:51 and sunset at 16:54 CET.
Sunshine
The months with the least sunshine in Merris, France, are January and December, with an average of 4h of sunshine.UV index
The months with the lowest UV index in Merris are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Merris, France
- Average high temperature in December: 7.2°C
The warmest months (with the highest average high temperature) are July and August (22.7°C).
The month with the lowest average high temperature is January (6.2°C).
- Average low temperature in December: 3.4°C
The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is January (1.8°C).
Average pressure in December
Merris, France
- Average pressure in December: 1015.9mbar
The month with the highest atmospheric pressure is September (1017.5mbar).
The month with the lowest atmospheric pressure is November (1011.9mbar).
Average wind speed in December
Merris, France
- Average wind speed in December: 18.2km/h
The windiest month (with the highest average wind speed) is December (18.2km/h).
The calmest month (with the lowest average wind speed) is August (12.9km/h).
Average humidity in December
Merris, 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 (74%).
Average rainfall in December
Merris, France
- Average rainfall in December: 61mm
The wettest month (with the highest rainfall) is December (61mm).
The driest month (with the least rainfall) is September (12mm).
Average rainfall days in December
Merris, France
- Average rainfall days in December: 18 days
The month with the highest number of rainy days is December (18 days).
The month with the least rainy days is September (7.5 days).
Average snowfall in December
Merris, France
- Average snowfall in December: 26mm
The month with the highest snowfall is January (34mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Merris, France
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is February (4 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
Merris, France
- Average daylight in December: 8h and 6min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The months with the least sunshine are January and December (Average sunshine: 4h and 0min).
Average sunshine days in December
Merris, France
- Average sunshine days in December: 8.5 days
The month with the most sunshine days is September (21.5 days).
The months with the least sunshine days are February and December (8.5 days).
Average UV index in December
Merris, 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
Merris, France
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are April and August (Cloud cover 40).
Average visibility in December
Merris, France
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
