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
The start of December signals a gentle decrease in the average high-temperature, transitioning from a wintry 0.4°C (32.7°F) in November to a subzero cold -3.2°C (26.2°F). Throughout December, a steady low-temperature average of -12.7°C (9.1°F) is noted.Humidity
The average relative humidity in December is 87%.Rainfall
In Promontogno, in December, it is raining for 2.6 days, with typically 34mm (1.34") of accumulated precipitation. Throughout the year, in Promontogno, there are 139.9 rainfall days, and 641mm (25.24") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall in Promontogno. In Promontogno, during December, snow falls for 12.9 days and regularly aggregates up to 250mm (9.84") of snow. In Promontogno, during the entire year, snow falls for 97.2 days and aggregates up to 1956mm (77.01") of snow.Daylight
December has the shortest days of the year, with an average of 8h and 42min of daylight.On the first day of December, sunrise is at 07:44 and sunset at 16:37. On the last day of the month, sunrise is at 08:04 and sunset at 16:45 CET.
Sunshine
In Promontogno, the average sunshine in December is 4.7h.UV index
In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 2 during December translates into these guidelines:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. To protect against the Sun's most potent rays, avoid direct exposure around midday. Tightly woven clothing, when worn loosely, shields effectively against the Sun. 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
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Promontogno have in December?
How high is the UV index in December?
Average temperature in December
Promontogno, Switzerland
- Average high temperature in December: -3.2°C
The warmest month (with the highest average high temperature) is July (15.4°C).
The month with the lowest average high temperature is January (-4.4°C).
- Average low temperature in December: -12.7°C
The month with the highest average low temperature is August (5°C).
The coldest month (with the lowest average low temperature) is January (-13.9°C).
Average pressure in December
Promontogno, Switzerland
- Average pressure in December: 1020.6mbar
The month with the highest atmospheric pressure is December (1020.6mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in December
Promontogno, Switzerland
- Average wind speed in December: 9.9km/h
The windiest months (with the highest average wind speed) are February and December (9.9km/h).
The calmest month (with the lowest average wind speed) is August (7.5km/h).
Average humidity in December
Promontogno, Switzerland
- Average humidity in December: 87%
The month with the highest relative humidity is April (94%).
The month with the lowest relative humidity is July (81%).
Average rainfall in December
Promontogno, Switzerland
- Average rainfall in December: 34mm
The wettest month (with the highest rainfall) is November (84mm).
The driest month (with the least rainfall) is January (20mm).
Average rainfall days in December
Promontogno, Switzerland
- Average rainfall days in December: 2.6 days
The month with the highest number of rainy days is July (22.6 days).
The month with the least rainy days is December (2.6 days).
Average snowfall in December
Promontogno, Switzerland
- Average snowfall in December: 250mm
The month with the highest snowfall is November (492mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in December
Promontogno, Switzerland
- Average snowfall days in December: 12.9 days
The month with the highest number of snowfall days is March (17 days).
The month with the least snowfall days is August (0 days).
Average daylight in December /
Average sunshine in December
Promontogno, Switzerland
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is November (Average sunshine: 3h and 54min).
Average sunshine days in December
Promontogno, Switzerland
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is December (18.8 days).
The month with the least sunshine days is July (6.2 days).
Average UV index in December
Promontogno, Switzerland
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 3).
The months with the lowest UV index are January, February, March, April, October and November (UV index 1).
Average cloud cover in December
Promontogno, Switzerland
- Average cloud cover in December: 52
The month with the most cloud cover is April (Cloud cover 66).
The month with the least cloud cover is July (Cloud cover 47).
Average visibility in December
Promontogno, Switzerland
- Average visibility in December: 7km
The month with the highest visibility is July (8km).
The month with the lowest visibility is April (5km).
