This report describes the typical weather at the Warsaw Frederic Chopin Airport (Warsaw, Poland) 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.
Warsaw has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by grasslands (52%), croplands (41%), and built-up areas (5%).
Over the course of a year, the temperature typically varies from 24°F to 75°F and is rarely below 8°F or above 85°F.
The warm season lasts from May 19 to September 8 with an average daily high temperature above 67°F. The hottest day of the year is August 6, with an average high of 75°F and low of 57°F.
The cold season lasts from November 17 to March 10 with an average daily high temperature below 41°F. The coldest day of the year is January 26, with an average low of 24°F and high of 33°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 7:41 hours of daylight; the longest day is June 20 with 16:47 hours of daylight.
The earliest sunrise is at 4:14am on June 18 and the latest sunset is at 9:02pm on June 23. The latest sunrise is at 7:46am on January 1 and the earliest sunset is at 3:23pm on December 11.
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 54% (partly cloudy) to 90% (mostly cloudy). The sky is cloudiest on December 11 and clearest on August 5. The clearer part of the year begins around April 6. The cloudier part of the year begins around October 6.
On August 5, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 64% of the time, and overcast or mostly cloudy 26% of the time.
On December 11, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 81% of the time, and clear or mostly clear 14% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around January 3, occurring in 75% of days. Precipitation is least likely around September 19, occurring in 49% of days.
Over the entire year, the most common forms of precipitation are moderate rain, moderate snow, thunderstorms, and light rain.
Moderate rain is the most severe precipitation observed during 44% of those days with precipitation. It is most likely around October 10, when it is observed during 36% of all days.
Moderate snow is the most severe precipitation observed during 21% of those days with precipitation. It is most likely around January 27, when it is observed during 38% of all days.
Thunderstorms are the most severe precipitation observed during 14% of those days with precipitation. They are most likely around July 11, when it is observed during 21% of all days.
Light rain is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around October 19, when it is observed during 11% of all days.
During the warm season, which lasts from May 19 to September 8, there is a 54% 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 (51% of days with precipitation have at worst moderate rain), thunderstorms (33%), and light rain (14%).
During the cold season, which lasts from November 17 to March 10, there is a 71% 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 snow (45% of days with precipitation have at worst moderate snow), moderate rain (28%), light snow (11%), and light rain (10%).
The likelihood of snow falling is highest around January 25, occurring in 49% of days. The season in which it is relatively likely for snow to fall spans from November 10 to April 4.
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 26, occurring 32% of the time. The season in which snow is relatively likely to be on the ground spans from November 17 to March 19.
The snow is typically at its deepest on February 21, with a median depth of 4.4"; the depth exceeds 8.8" only one year out of ten.
The relative humidity typically ranges from 46% (comfortable) to 97% (very humid) over the course of the year, rarely dropping below 28% (dry) and reaching as high as 100% (very humid).
The air is driest around April 25, at which time the relative humidity drops below 55% (mildly humid) three days out of four; it is most humid around November 19, exceeding 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 year, the dew point typically varies from 20°F (dry) to 61°F (comfortable) and is rarely below 3°F (dry) or above 67°F (muggy).
The time of the year between May 12 and October 5 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 2 mph to 15 mph (light air to moderate breeze), rarely exceeding 23 mph (fresh breeze).
The highest average wind speed of 10 mph (gentle breeze) occurs around January 28, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around August 9, at which time the average daily maximum wind speed is 12 mph (moderate breeze).