This report describes the typical weather at the Jinnah International Airport (Karachi, Pakistan) weather station over the course of an average year. It is based on the historical records from 1992 to 2012. Earlier records are either unavailable or unreliable.
Karachi has a hot desert climate. The area within 25 mi of this station is covered by shrublands (62%), oceans and seas (27%), built-up areas (5%), and croplands (4%).
Over the course of a year, the temperature typically varies from 55°F to 96°F and is rarely below 49°F or above 102°F.
The warm season lasts from March 25 to July 13 with an average daily high temperature above 92°F. The hottest day of the year is May 5, with an average high of 96°F and low of 79°F.
The cold season lasts from December 18 to February 7 with an average daily high temperature below 81°F. The coldest day of the year is January 10, with an average low of 55°F and high of 78°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 10:36 hours of daylight; the longest day is June 20 with 13:41 hours of daylight.
The earliest sunrise is at 5:41am on June 6 and the latest sunset is at 7:25pm on July 5. The latest sunrise is at 7:19am on January 15 and the earliest sunset is at 5:41pm on November 27.
Daylight savings time (DST) is not observed in 2012.
The median cloud cover ranges from 4% (clear) to 85% (mostly cloudy). The sky is cloudiest on July 24 and clearest on November 14. The clearer part of the year begins around September 19. The cloudier part of the year begins around May 30.
On November 14, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 86% of the time, and overcast or mostly cloudy 5% of the time.
On July 24, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 82% 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 August 4, occurring in 35% of days. Precipitation is least likely around April 27, occurring in 2% of days.
Over the entire year, the most common forms of precipitation are thunderstorms, drizzle, and moderate rain.
Thunderstorms are the most severe precipitation observed during 38% of those days with precipitation. They are most likely around August 12, when it is observed during 12% of all days.
Drizzle is the most severe precipitation observed during 34% of those days with precipitation. It is most likely around July 30, when it is observed during 14% of all days.
Moderate rain is the most severe precipitation observed during 22% of those days with precipitation. It is most likely around July 28, when it is observed during 8% of all days.
During the warm season, which lasts from March 25 to July 13, there is a 8% 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 thunderstorms (40% of days with precipitation have at worst thunderstorms), drizzle (36%), moderate rain (19%), and light rain (5%).
During the cold season, which lasts from December 18 to February 7, there is a 5% 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 thunderstorms (43% of days with precipitation have at worst thunderstorms), moderate rain (28%), drizzle (18%), and light rain (9%).
Either snow is exceptionally unlikely to fall at any time during the year at this location or this station does not reliably report precipitation types.
The relative humidity typically ranges from 25% (dry) to 91% (very humid) over the course of the year, rarely dropping below 10% (very dry) and reaching as high as 100% (very humid).
The air is driest around February 9, at which time the relative humidity drops below 33% (comfortable) three days out of four; it is most humid around August 2, exceeding 83% (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 35°F (dry) to 79°F (oppressive) and is rarely below 18°F (dry) or above 81°F (very oppressive).
There are two periods in the year that are most comfortable: The first is between January 1 and March 17 and the second is between November 10 and December 31. The air feels neither too dry nor too muggy during these periods.
Over the course of the year typical wind speeds vary from 0 mph to 19 mph (calm to fresh breeze), rarely exceeding 29 mph (strong breeze).
The highest average wind speed of 13 mph (moderate breeze) occurs around May 18, at which time the average daily maximum wind speed is 18 mph (fresh breeze).
The lowest average wind speed of 5 mph (light breeze) occurs around November 16, at which time the average daily maximum wind speed is 10 mph (gentle breeze).