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
Weather in December
Temperature
December implies a soft temperature shift, with average high-temperatures reducing from November's chilly 8.7°C (47.7°F) to a wintry 4.9°C (40.8°F). During December, Cossonay's temperature averages to a subzero cold -0.4°C (31.3°F) at night.Humidity
The average relative humidity in December in Cossonay, Switzerland, is 80%.Rainfall
The month with the most rainfall in Cossonay is December, when the rain falls for 13.8 days and typically aggregates up to 103mm (4.06") of precipitation.Snowfall
January through May, October through December are months with snowfall. December is the month with the most snowfall in Cossonay. Snow falls for 8 days and accumulates 184mm (7.24") of snow.Daylight
With an average of 8h and 36min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 07:58 and sunset at 16:48. On the last day of December, in Cossonay, Switzerland, sunrise is at 08:18 and sunset at 16:56 CET.
Sunshine
With an average of 5.7h of sunshine, December has the least sunshine of the year in Cossonay.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 during December translates into the following directions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Frequently asked questions
Is it cold in Cossonay during December?
What is the average humidity in December in Cossonay?
What is the rainiest month in Cossonay?
How much does it rain in Cossonay in December?
What is the snowiest month in Cossonay?
How many days does it snow in December in Cossonay?
What is the month with the shortest days in Cossonay?
What is the average length of the day in December in Cossonay?
When is the sunrise / sunset in December in Cossonay?
What is the month with the least sunshine in Cossonay?
How long on average sun shines in December in Cossonay?
What is the month with the lowest UV index in Cossonay?
How high is the UV index in December in Cossonay?
Average temperature in December
Cossonay, Switzerland
- Average high temperature in December: 4.9°C
The warmest month (with the highest average high temperature) is July (22.2°C).
The month with the lowest average high temperature is January (3.3°C).
- Average low temperature in December: -0.4°C
The month with the highest average low temperature is July (12.6°C).
The coldest months (with the lowest average low temperature) are January and February (-2.2°C).
Average pressure in December
Cossonay, Switzerland
- Average pressure in December: 1021.1mbar
The month with the highest atmospheric pressure is December (1021.1mbar).
The month with the lowest atmospheric pressure is April (1015.5mbar).
Average wind speed in December
Cossonay, Switzerland
- Average wind speed in December: 11.7km/h
The windiest month (with the highest average wind speed) is February (12.1km/h).
The calmest month (with the lowest average wind speed) is August (7km/h).
Average humidity in December
Cossonay, Switzerland
- Average humidity in December: 80%
The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in December
Cossonay, Switzerland
- Average rainfall in December: 103mm
The wettest month (with the highest rainfall) is December (103mm).
The driest month (with the least rainfall) is September (38mm).
Average rainfall days in December
Cossonay, Switzerland
- Average rainfall days in December: 13.8 days
The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is February (11.8 days).
Average snowfall in December
Cossonay, Switzerland
- Average snowfall in December: 184mm
The month with the highest snowfall is December (184mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Cossonay, Switzerland
- Average snowfall days in December: 8 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Cossonay, Switzerland
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 5h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Cossonay, Switzerland
- Average sunshine days in December: 13 days
The month with the most sunshine days is October (16 days).
The month with the least sunshine days is June (6.7 days).
Average UV index in December
Cossonay, Switzerland
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Cossonay, Switzerland
- Average cloud cover in December: 40
The month with the most cloud cover is January (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Cossonay, Switzerland
- 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).
Cossonay, Switzerland
Weather forecast for your location
2. Allow the app to use your location
