December weather forecastGromnik, Poland
December
Weather in December
December, the first month of the winter in Gromnik, is still a cold month, with an average temperature fluctuating between -1.7°C (28.9°F) and 2.5°C (36.5°F).Temperature
Gromnik's weather in December involves a decrease in the average high-temperature, moving down from November's chilly 8.5°C (47.3°F) to an icy 2.5°C (36.5°F). Night temperatures during December in Gromnik, Poland, stabilize at an average of -1.7°C (28.9°F), closely mirroring the daytime temperatures.Humidity
The average relative humidity in December in Gromnik is 85%.Rainfall
In Gromnik, during December, the rain falls for 7.8 days and regularly aggregates up to 25mm (0.98") of precipitation. In Gromnik, during the entire year, the rain falls for 131.2 days and collects up to 389mm (15.31") of precipitation.Snowfall
January through May, October through December are months with snowfall in Gromnik. In December, it is snowing for 9.5 days. Throughout December, 65mm (2.56") of snow is accumulated. In Gromnik, during the entire year, snow falls for 46.7 days and aggregates up to 304mm (11.97") of snow.Daylight
The month with the shortest days is December, with an average of 8h and 12min of daylight.On the first day of the month, sunrise is at 07:12 and sunset at 15:37. On the last day of December, in Gromnik, sunrise is at 07:33 and sunset at 15:44 CET.
Sunshine
The average sunshine in December in Gromnik is 3.8h.UV index
The months with the lowest UV index are November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: In December, the maximum UV index of 1 transforms into these recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Gromnik, Poland
- Average high temperature in December: 2.5°C
The warmest month (with the highest average high temperature) is August (25.2°C).
The month with the lowest average high temperature is January (0.3°C).
- Average low temperature in December: -1.7°C
The month with the highest average low temperature is July (14.1°C).
The coldest month (with the lowest average low temperature) is January (-3.9°C).
Average pressure in December
Gromnik, Poland
- Average pressure in December: 1018.6mbar
The month with the highest atmospheric pressure is October (1019mbar).
The month with the lowest atmospheric pressure is July (1014.4mbar).
Average wind speed in December
Gromnik, Poland
- Average wind speed in December: 12.5km/h
The windiest month (with the highest average wind speed) is March (12.7km/h).
The calmest month (with the lowest average wind speed) is August (8.8km/h).
Average humidity in December
Gromnik, Poland
- Average humidity in December: 85%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is August (70%).
Average rainfall in December
Gromnik, Poland
- Average rainfall in December: 25mm
The wettest month (with the highest rainfall) is May (61mm).
The driest month (with the least rainfall) is March (18mm).
Average rainfall days in December
Gromnik, Poland
- Average rainfall days in December: 7.8 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in December
Gromnik, Poland
- Average snowfall in December: 65mm
The month with the highest snowfall is January (87mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Gromnik, Poland
- Average snowfall days in December: 9.5 days
The month with the highest number of snowfall days is January (14 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Gromnik, Poland
- Average daylight in December: 8h and 12min
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 48min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 6min).
Average sunshine days in December
Gromnik, Poland
- Average sunshine days in December: 14.6 days
The month with the most sunshine days is November (17.9 days).
The months with the least sunshine days are February and June (11.6 days).
Average UV index in December
Gromnik, 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 November and December (UV index 1).
Average cloud cover in December
Gromnik, Poland
- Average cloud cover in December: 63
The month with the most cloud cover is February (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Gromnik, Poland
- Average visibility in December: 9km
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January and February (8km).
