This report describes the typical weather at the Copenhagen Airport (Kastrup near Copenhagen, Denmark) weather station over the course of an average year. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Kastrup near Copenhagen has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by oceans and seas (47%), croplands (41%), built-up areas (10%), and grasslands (3%).
Over the course of a year, the temperature typically varies from 29°F to 71°F and is rarely below 18°F or above 78°F.
The warm season lasts from June 3 to September 8 with an average daily high temperature above 64°F. The hottest day of the year is August 2, with an average high of 71°F and low of 57°F.
The cold season lasts from November 21 to March 22 with an average daily high temperature below 43°F. The coldest day of the year is February 14, with an average low of 29°F and high of 36°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 7:02 hours of daylight; the longest day is June 20 with 17:32 hours of daylight.
The earliest sunrise is at 4:24am on June 17 and the latest sunset is at 9:58pm on June 24. The latest sunrise is at 8:39am on December 26 and the earliest sunset is at 3:36pm on December 16.
Daylight savings time (DST) is observed in this location during 2012, starting in the spring on March 25 and ending in the fall on October 28.
The median cloud cover ranges from 63% (partly cloudy) to 91% (mostly cloudy). The sky is cloudiest on January 1 and clearest on August 1. The clearer part of the year begins around April 6. The cloudier part of the year begins around September 30.
On August 1, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 57% of the time, and overcast or mostly cloudy 35% of the time.
On January 1, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 77% of the time, and clear or mostly clear 16% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around December 15, occurring in 73% of days. Precipitation is least likely around May 7, occurring in 50% of days.
Over the entire year, the most common forms of precipitation are moderate rain, moderate snow, and light rain.
Moderate rain is the most severe precipitation observed during 56% of those days with precipitation. It is most likely around October 27, when it is observed during 46% of all days.
Moderate snow is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around January 29, when it is observed during 25% of all days.
Light rain is the most severe precipitation observed during 11% of those days with precipitation. It is most likely around October 31, when it is observed during 9% of all days.
During the warm season, which lasts from June 3 to September 8, there is a 55% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of moderate rain (63% of days with precipitation have at worst moderate rain), thunderstorms (16%), and light rain (14%).
During the cold season, which lasts from November 21 to March 22, there is a 69% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of moderate rain (42% of days with precipitation have at worst moderate rain), moderate snow (29%), light snow (11%), and drizzle (8%).
The likelihood of snow falling is highest around January 29, occurring in 35% of days. The season in which it is relatively likely for snow to fall spans from November 18 to April 13.
During peak snow season, accumulation at this location on a given day is unlikely. The chances of there being snow on the ground are highest around February 14, occurring 15% of the time. The season in which snow is relatively likely to be on the ground spans from December 9 to March 21.
The snow is typically at its deepest on January 8, with a median depth of 2.7"; the depth exceeds 6.3" only one year out of ten.
The relative humidity typically ranges from 51% (mildly humid) to 96% (very humid) over the course of the year, rarely dropping below 34% (comfortable) and reaching as high as 100% (very humid).
The air is driest around May 15, at which time the relative humidity drops below 61% (mildly humid) three days out of four; it is most humid around January 1, exceeding 93% (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 year, the dew point typically varies from 25°F (dry) to 59°F (comfortable) and is rarely below 14°F (dry) or above 64°F (mildy humid).
The time of the year between May 28 and October 6 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of the year typical wind speeds vary from 4 mph to 21 mph (light breeze to fresh breeze), rarely exceeding 30 mph (strong breeze).
The highest average wind speed of 14 mph (moderate breeze) occurs around January 3, at which time the average daily maximum wind speed is 21 mph (fresh breeze).
The lowest average wind speed of 10 mph (gentle breeze) occurs around August 1, at which time the average daily maximum wind speed is 15 mph (moderate breeze).