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
December
Weather in December
Temperature
Grolley's weather in December involves a mild decrease in the average high-temperature, moving down slightly from November's frosty 7.7°C (45.9°F) to an icy 3.7°C (38.7°F). Grolley's average low-temperature during December nights is observed to be a subzero cold -2.7°C (27.1°F).Humidity
In Grolley, Switzerland, the average relative humidity in December is 84%.Rainfall
In Grolley, in December, it is raining for 13.9 days, with typically 98mm (3.86") of accumulated precipitation. Throughout the year, in Grolley, Switzerland, there are 205.3 rainfall days, and 992mm (39.06") of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. The month with the most snowfall in Grolley is December, when snow falls for 8.6 days and typically aggregates up to 192mm (7.56") 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 December, sunrise is at 07:56 and sunset at 16:45. On the last day of the month, sunrise is at 08:16 and sunset at 16:53 CET.
Sunshine
With an average of 5.2h of sunshine, December has the least sunshine of the year.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: An average UV index of 2 in December transforms into this advice:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold in Grolley?
What is the average humidity in December in Grolley?
How many days does it rain in December in Grolley?
What is the snowiest month in Grolley?
How many days does it snow in December in Grolley?
What is the month with the shortest days in Grolley?
What is the average length of the day in December in Grolley?
What time are sunrise and sunset in December in Grolley?
What is the month with the least sunshine in Grolley?
How many hours of sunshine does Grolley have in December?
What are the months with the lowest UV index in Grolley?
What is the UV index intensity in December in Grolley?
Average temperature in December
Grolley, Switzerland
- Average high temperature in December: 3.7°C
The warmest month (with the highest average high temperature) is July (22°C).
The month with the lowest average high temperature is January (2.2°C).
- Average low temperature in December: -2.7°C
The month with the highest average low temperature is July (10.8°C).
The coldest month (with the lowest average low temperature) is February (-4.6°C).
Average pressure in December
Grolley, 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
Grolley, Switzerland
- Average wind speed in December: 9.8km/h
The windiest month (with the highest average wind speed) is February (9.9km/h).
The calmest month (with the lowest average wind speed) is August (6.3km/h).
Average humidity in December
Grolley, Switzerland
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April, July and August (79%).
Average rainfall in December
Grolley, Switzerland
- Average rainfall in December: 98mm
The wettest month (with the highest rainfall) is June (117mm).
The driest month (with the least rainfall) is September (53mm).
Average rainfall days in December
Grolley, Switzerland
- Average rainfall days in December: 13.9 days
The month with the highest number of rainy days is May (23.1 days).
The month with the least rainy days is February (12.2 days).
Average snowfall in December
Grolley, Switzerland
- Average snowfall in December: 192mm
The month with the highest snowfall is December (192mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Grolley, Switzerland
- Average snowfall days in December: 8.6 days
The month with the highest number of snowfall days is February (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Grolley, 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 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in December
Grolley, Switzerland
- Average sunshine days in December: 12.2 days
The month with the most sunshine days is October (14.6 days).
The month with the least sunshine days is June (4.3 days).
Average UV index in December
Grolley, 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, March, November and December (UV index 2).
Average cloud cover in December
Grolley, Switzerland
- Average cloud cover in December: 45
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Grolley, Switzerland
- Average visibility in December: 8km
The months with the highest visibility are March, April and August (9km).
The months with the lowest visibility are January, February, May, June, July, September, October, November and December (8km).
