This report describes the typical weather at the Allama Iqbal International Airport (Lahore, Pakistan) weather station over the course of an average April. It is based on the historical records from 1992 to 2012. Earlier records are either unavailable or unreliable.
Lahore has a hot semi-arid steppe climate. The area within 25 mi of this station is covered by croplands (95%) and built-up areas (3%).
The month of April is characterized by rapidly rising daily high temperatures, with daily highs increasing from 88°F to 99°F over the course of the month, exceeding 107°F or dropping below 79°F only one day in ten.
Over the course of April, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 53 minutes, implying an average day-over-day increase of 1.8 minutes.
The shortest day of the month is April 1 with 12:31 hours of daylight; the longest day is April 30 with 13:24 hours of daylight.
The earliest sunrise is at 5:18am on April 30; the latest sunset is at 6:42pm on April 30; the latest sunrise is at 5:51am on April 1; the earliest sunset is at 6:22pm on April 1.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover is 24% (mostly clear) and does not vary substantially over the course of the month.
On April 15, a representative day, the sky is clear or mostly clear 56% of the time, partly cloudy 17% of the time, and mostly cloudy or overcast 11% of the time.
The average probability that some form of precipitation will be observed in a given day is 24%, with little variation over the course of the month.
Throughout April, the most common forms of precipitation are thunderstorms and moderate rain.
Thunderstorms are the most severe precipitation observed during 84% of those days with precipitation. They are most likely around April 30, when it is observed during 22% of all days.
Moderate rain is the most severe precipitation observed during 11% of those days with precipitation. It is most likely around April 1, when it is observed during 4% of all days.
Either snow is exceptionally unlikely to fall at this location in April or this station does not reliably report precipitation types.
The relative humidity typically ranges from 22% (dry) to 85% (very humid) over the course of a typical April, rarely dropping below 10% (very dry) and reaching as high as 100% (very humid).
The air is driest around April 30, at which time the relative humidity drops below 26% (dry) three days out of four; it is most humid around April 1, rising above 74% (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 April, the dew point typically varies from 47°F (dry) to 62°F (comfortable) and is rarely below 33°F (dry) or above 68°F (muggy).
The time of the month between April 1 and April 30 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of April typical wind speeds vary from 0 mph to 12 mph (calm to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 6 mph (light breeze) occurs around April 30, at which time the average daily maximum wind speed is 12 mph (gentle breeze).
The lowest average wind speed of 5 mph (light breeze) occurs around April 3, at which time the average daily maximum wind speed is 11 mph (gentle breeze).