This report describes the typical weather at the Berlin Brandenburg International Airport (Berlin, Germany) weather station over the course of an average December. It is based on the historical records from 2006 to 2012. Earlier records are either unavailable or unreliable.
Berlin has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by croplands (78%), built-up areas (13%), grasslands (5%), and lakes and rivers (3%).
The month of December is characterized by falling daily high temperatures, with daily highs ranging from 43°F to 37°F over the course of the month, exceeding 51°F or dropping below 26°F only one day in ten.
Over the course of December, the length of the day is essentially constant. The shortest day of the month is December 18 with 7:41 hours of daylight; the longest day is December 1 with 8:02 hours of daylight.
The earliest sunrise is at 7:53am on December 1; the latest sunset is at 4:03pm on December 31; the latest sunrise is at 8:17am on December 30; the earliest sunset is at 3:52pm on December 12.
Daylight saving time is observed in 2012 but it neither starts nor ends in December, so the entire month is in standard time.
The median cloud cover is 89% (mostly cloudy) and does not vary substantially over the course of the month.
On December 16, a representative day, the sky is clear or mostly clear 3% of the time, partly cloudy 5% of the time, and mostly cloudy or overcast 67% of the time.
The average probability that some form of precipitation will be observed in a given day is 72%, with little variation over the course of the month.
Throughout December, the most common forms of precipitation are moderate rain, light rain, moderate snow, and light snow.
Moderate rain is the most severe precipitation observed during 32% of those days with precipitation. It is most likely around December 2, when it is observed during 24% of all days.
Light rain is the most severe precipitation observed during 23% of those days with precipitation. It is most likely around December 4, when it is observed during 19% of all days.
Moderate snow is the most severe precipitation observed during 23% of those days with precipitation. It is most likely around December 31, when it is observed during 19% of all days.
Light snow is the most severe precipitation observed during 10% of those days with precipitation. It is most likely around December 21, when it is observed during 8% of all days.
The likelihood of snow falling is highest around December 31, occurring in 28% of days.
Either snow rarely accumulates at this location in December or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 76% (humid) to 97% (very humid) over the course of a typical December, rarely dropping below 65% (mildly humid) and reaching as high as 100% (very humid).
The air is driest around December 1, at which time the relative humidity drops below 82% (humid) three days out of four; it is most humid around December 30, rising above 95% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical December, the dew point typically varies from 25°F (dry) to 38°F (dry) and is rarely below 14°F (dry) or above 45°F (dry).
Over the course of December typical wind speeds vary from 5 mph to 16 mph (light breeze to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 11 mph (gentle breeze) occurs around December 4, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 9 mph (gentle breeze) occurs around December 20, at which time the average daily maximum wind speed is 14 mph (moderate breeze).