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
Transition into December marks a drop in the average high-temperature, moving from a frosty 8.1°C (46.6°F) in November to a wintry 2.2°C (36°F). Siennów in December experiences a minor decline in temperature, with an average low of -2.2°C (28°F) at night.Humidity
The average relative humidity in December in Siennów, Poland, is 86%.Rainfall
In Siennów, Poland, in December, it is raining for 8.1 days, with typically 21mm (0.83") of accumulated precipitation. Throughout the year, there are 124.8 rainfall days, and 295mm (11.61") of precipitation is accumulated.Snowfall
Months with snowfall in Siennów, Poland, are January through April, October through December. The month with the most snowfall is December, when snow falls for 11 days and typically aggregates up to 54mm (2.13") of snow.Daylight
The month with the shortest days in Siennów is December, with an average of 8h and 12min of daylight.On the first day of the month, sunrise is at 07:07 and sunset at 15:31. On the last day of December, in Siennów, Poland, sunrise is at 07:28 and sunset at 15:38 CET.
Sunshine
The average sunshine in December in Siennów, Poland, is 3.5h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Siennów. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: The UV index of 1 during December leads to these advisories:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Siennów in December?
What is the average humidity in December in Siennów?
How many days does it rain in December in Siennów?
When does it snow the most in Siennów?
How much does it snow in Siennów in December?
What is the month with the shortest days in Siennów?
What is the average length of the day in December in Siennów?
When are sunrise and sunset in December in Siennów?
How many hours of sunshine does Siennów have in December?
What are the months with the lowest UV index in Siennów?
How high is the UV index in December in Siennów?
Average temperature in December
Siennów, Poland
- Average high temperature in December: 2.2°C
The warmest month (with the highest average high temperature) is August (25.8°C).
The month with the lowest average high temperature is January (-0.1°C).
- Average low temperature in December: -2.2°C
The months with the highest average low temperature are July and August (13.9°C).
The coldest month (with the lowest average low temperature) is January (-4.5°C).
Average pressure in December
Siennów, Poland
- Average pressure in December: 1018.6mbar
The month with the highest atmospheric pressure is October (1019.2mbar).
The month with the lowest atmospheric pressure is July (1014.2mbar).
Average wind speed in December
Siennów, Poland
- Average wind speed in December: 13.9km/h
The windiest month (with the highest average wind speed) is December (13.9km/h).
The calmest month (with the lowest average wind speed) is August (9.3km/h).
Average humidity in December
Siennów, Poland
- Average humidity in December: 86%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (68%).
Average rainfall in December
Siennów, Poland
- Average rainfall in December: 21mm
The wettest month (with the highest rainfall) is May (47mm).
The driest month (with the least rainfall) is January (15mm).
Average rainfall days in December
Siennów, Poland
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (6.4 days).
Average snowfall in December
Siennów, Poland
- Average snowfall in December: 54mm
The month with the highest snowfall is December (54mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in December
Siennów, Poland
- Average snowfall days in December: 11 days
The month with the highest number of snowfall days is January (13.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Siennów, Poland
- Average daylight in December: 8h and 1min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in December: 3h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Siennów, Poland
- Average sunshine days in December: 13.9 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in December
Siennów, Poland
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Siennów, Poland
- Average cloud cover in December: 66
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Siennów, Poland
- Average visibility in December: 8km
The months with the highest visibility are March, April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January and February (7km).
