December weather forecastSianow, Poland
December
Weather in December
December, the first month of the winter in Sianow, is still a cold month, with an average temperature varying between 0.6°C (33.1°F) and 3.3°C (37.9°F).Temperature
The start of December involves a subtle temperature drop, shifting from a frosty 7.5°C (45.5°F) in November to an icy 3.3°C (37.9°F). During December, Sianow's nights hold steady with an average temperature of 0.6°C (33.1°F), barely dropping from the daytime highs.Humidity
January and December, with an average relative humidity of 87%, are the most humid months in Sianow.Rainfall
In December, the rain falls for 13.5 days. Throughout December, 38mm (1.5") of precipitation is accumulated. Throughout the year, there are 142.6 rainfall days, and 388mm (15.28") of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall in Sianow. In December, it is snowing for 6.7 days. Throughout December, 30mm (1.18") of snow is accumulated. In Sianow, during the entire year, snow falls for 31.1 days and aggregates up to 172mm (6.77") of snow.Daylight
With an average of 7h and 24min of daylight, December has the shortest days of the year in Sianow.On the first day of the month, sunrise is at 07:52 and sunset at 15:35. On the last day of December, in Sianow, sunrise is at 08:14 and sunset at 15:41 CET.
Sunshine
The months with the least sunshine are January and December, with an average of 3.1h of sunshine.UV index
The months with the lowest UV index in Sianow are January, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, an average UV index of 1 transforms into the following instructions:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sianow, Poland
- Average high temperature in December: 3.3°C
The warmest month (with the highest average high temperature) is August (22.1°C).
The month with the lowest average high temperature is January (1.3°C).
- Average low temperature in December: 0.6°C
The month with the highest average low temperature is August (15.3°C).
The coldest months (with the lowest average low temperature) are January and February (-1.1°C).
Average pressure in December
Sianow, Poland
- Average pressure in December: 1013.2mbar
The month with the highest atmospheric pressure is October (1016.4mbar).
The months with the lowest atmospheric pressure are November and December (1013.2mbar).
Average wind speed in December
Sianow, Poland
- Average wind speed in December: 20.3km/h
The windiest month (with the highest average wind speed) is December (20.3km/h).
The calmest month (with the lowest average wind speed) is August (14.4km/h).
Average humidity in December
Sianow, Poland
- Average humidity in December: 87%
The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Sianow, Poland
- Average rainfall in December: 38mm
The wettest month (with the highest rainfall) is July (51mm).
The driest month (with the least rainfall) is April (11mm).
Average rainfall days in December
Sianow, Poland
- Average rainfall days in December: 13.5 days
The month with the highest number of rainy days is July (14.4 days).
The month with the least rainy days is April (8.8 days).
Average snowfall in December
Sianow, Poland
- Average snowfall in December: 30mm
The month with the highest snowfall is January (62mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in December
Sianow, Poland
- Average snowfall days in December: 6.7 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Sianow, Poland
- Average daylight in December: 7h and 24min
The month with the longest days is June (Average daylight: 17h and 6min).
The month with the shortest days is December (Average daylight: 7h and 24min).
- Average sunshine in December: 3h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The months with the least sunshine are January and December (Average sunshine: 3h and 6min).
Average sunshine days in December
Sianow, Poland
- Average sunshine days in December: 11.1 days
The month with the most sunshine days is April (19.2 days).
The month with the least sunshine days is December (11.1 days).
Average UV index in December
Sianow, Poland
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Sianow, Poland
- Average cloud cover in December: 71
The month with the most cloud cover is December (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Sianow, Poland
- Average visibility in December: 9km
The months with the highest visibility are April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, November and December (9km).
