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
December implies a soft temperature shift, with average high-temperatures reducing from November's cold 2.3°C (36.1°F) to a freezing cold -1.9°C (28.6°F). In Sillian, an average nighttime temperature of -10.2°C (13.6°F) is expected during December.Humidity
In December, the average relative humidity is 85%.Rainfall
December is the month with the least rainfall. Rain falls for 10.5 days and accumulates 59mm (2.32") of precipitation.Snowfall
January through May, October through December are months with snowfall. In Sillian, during December, snow falls for 15.5 days and regularly aggregates up to 283mm (11.14") of snow. In Sillian, during the entire year, snow falls for 91.7 days and aggregates up to 2208mm (86.93") of snow.Daylight
The month with the shortest days is December, with an average of 8h and 36min of daylight.On the first day of the month, sunrise is at 07:34 and sunset at 16:24. On the last day of December, sunrise is at 07:54 and sunset at 16:32 CET.
Sunshine
In Sillian, Austria, the average sunshine in December is 5.1h.UV index
In Sillian, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The average daily UV index of 2 in December transforms into the following instructions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Around midday, solar radiation is most harmful; hence, exposure should be limited. Experience reduced UV exposure by about half when donning a wide-brim hat. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Sillian?
What is the average humidity in December in Sillian?
What is the driest month in Sillian?
How many days does it rain in December in Sillian?
How much does it snow in Sillian in December?
What is the month with the shortest days in Sillian?
How many hours of daylight does Sillian have in December?
When are sunrise and sunset in December in Sillian?
How many hours of sunshine does Sillian have in December?
How high is the UV index in December in Sillian?
Average temperature in December
Sillian, Austria
- Average high temperature in December: -1.9°C
The warmest month (with the highest average high temperature) is July (17.3°C).
The month with the lowest average high temperature is January (-2.9°C).
- Average low temperature in December: -10.2°C
The month with the highest average low temperature is August (6°C).
The coldest month (with the lowest average low temperature) is January (-11.9°C).
Average pressure in December
Sillian, Austria
- Average pressure in December: 1020.4mbar
The month with the highest atmospheric pressure is December (1020.4mbar).
The month with the lowest atmospheric pressure is May (1015.4mbar).
Average wind speed in December
Sillian, Austria
- Average wind speed in December: 7.6km/h
The windiest month (with the highest average wind speed) is February (8.3km/h).
The calmest month (with the lowest average wind speed) is August (5.6km/h).
Average humidity in December
Sillian, Austria
- Average humidity in December: 85%
The month with the highest relative humidity is March (93%).
The month with the lowest relative humidity is July (83%).
Average rainfall in December
Sillian, Austria
- Average rainfall in December: 59mm
The wettest month (with the highest rainfall) is August (176mm).
The driest month (with the least rainfall) is December (59mm).
Average rainfall days in December
Sillian, Austria
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is July (28.5 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in December
Sillian, Austria
- Average snowfall in December: 283mm
The month with the highest snowfall is February (471mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Sillian, Austria
- Average snowfall days in December: 15.5 days
The month with the highest number of snowfall days is February (19.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Sillian, Austria
- 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 month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is November (Average sunshine: 4h and 12min).
Average sunshine days in December
Sillian, Austria
- Average sunshine days in December: 12.4 days
The month with the most sunshine days is October (12.6 days).
The month with the least sunshine days is July (1.5 days).
Average UV index in December
Sillian, Austria
- Average UV index in December: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February and March (UV index 1).
Average cloud cover in December
Sillian, Austria
- Average cloud cover in December: 45
The months with the most cloud cover are March and April (Cloud cover 58).
The months with the least cloud cover are July and December (Cloud cover 45).
Average visibility in December
Sillian, Austria
- Average visibility in December: 7km
The month with the highest visibility is July (8km).
The months with the lowest visibility are January, February, March, April, May, September and November (6km).
