December weather forecastPerroy, Switzerland
December
Weather in December
December, the first month of the winter in Perroy, is still a cold month, with an average temperature ranging between min -0.6°C (30.9°F) and max 4.7°C (40.5°F).Temperature
The onset of December is marked by a minor decrease in temperature, transitioning from a frosty 8.6°C (47.5°F) in November to a cold 4.7°C (40.5°F). Perroy temperatures generally rest at a low of -0.6°C (30.9°F) during the December nights.Humidity
In Perroy, the average relative humidity in December is 80%.Rainfall
December is the month with the most rainfall in Perroy. Rain falls for 12.2 days and accumulates 103mm (4.06") of precipitation.Snowfall
Months with snowfall in Perroy, Switzerland, are January through May, October through December. The month with the most snowfall in Perroy is December, when snow falls for 4.8 days and typically aggregates up to 98mm (3.86") of snow.Daylight
With an average of 8h and 42min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 07:58 and sunset at 16:49. On the last day of the month, sunrise is at 08:18 and sunset at 16:57 CET.
Sunshine
The month with the least sunshine in Perroy is December, with an average of 5.6h of sunshine.UV index
The months with the lowest UV index in Perroy are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 2 during December translates into these guidelines:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Perroy, Switzerland
- Average high temperature in December: 4.7°C
The warmest month (with the highest average high temperature) is August (22.3°C).
The month with the lowest average high temperature is January (3.3°C).
- Average low temperature in December: -0.6°C
The months with the highest average low temperature are July and August (12.3°C).
The coldest month (with the lowest average low temperature) is February (-2.8°C).
Average pressure in December
Perroy, 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 (1015.4mbar).
Average wind speed in December
Perroy, Switzerland
- Average wind speed in December: 10.8km/h
The windiest month (with the highest average wind speed) is February (11.2km/h).
The calmest month (with the lowest average wind speed) is August (6.7km/h).
Average humidity in December
Perroy, Switzerland
- Average humidity in December: 80%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is August (76%).
Average rainfall in December
Perroy, 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 (42mm).
Average rainfall days in December
Perroy, Switzerland
- Average rainfall days in December: 12.2 days
The months with the highest number of rainy days are May and June (20.4 days).
The month with the least rainy days is October (11.5 days).
Average snowfall in December
Perroy, Switzerland
- Average snowfall in December: 98mm
The month with the highest snowfall is December (98mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Perroy, Switzerland
- Average snowfall days in December: 4.8 days
The month with the highest number of snowfall days is February (6.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Perroy, Switzerland
- Average daylight in December: 8h and 42min
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 42min).
- Average sunshine in December: 5h and 36min
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 36min).
Average sunshine days in December
Perroy, Switzerland
- Average sunshine days in December: 15.4 days
The month with the most sunshine days is October (17.4 days).
The month with the least sunshine days is June (7.3 days).
Average UV index in December
Perroy, 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
Perroy, Switzerland
- Average cloud cover in December: 40
The months with the most cloud cover are January and December (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Perroy, 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).
