This report describes the typical weather at the Chennai International Airport (Chennai/Madras, India) weather station over the course of an average August. It is based on the historical records from 1996 to 2012. Earlier records are either unavailable or unreliable.
Chennai/Madras has a tropical savanna climate with dry winters. The area within 25 mi of this station is covered by croplands (60%), oceans and seas (33%), built-up areas (3%), and lakes and rivers (3%).
The month of August is characterized by essentially constant daily high temperatures, with daily highs around 93°F throughout the month, exceeding 98°F or dropping below 88°F only one day in ten.
Over the course of August, the length of the day is essentially constant. The shortest day of the month is August 31 with 12:22 hours of daylight; the longest day is August 1 with 12:41 hours of daylight.
The earliest sunrise is at 5:55am on August 1; the latest sunset is at 6:36pm on August 1; the latest sunrise is at 5:58am on August 31; the earliest sunset is at 6:21pm on August 31.
Daylight savings time (DST) is not observed in 2012.
The median cloud cover ranges from 73% (partly cloudy) to 78% (partly cloudy). The trend is for the sky to be clearing with the median cloud cover decreasing by 6% from the start to the end of the month.
On August 16, a representative day, the sky is clear or mostly clear 8% of the time, partly cloudy 40% of the time, and mostly cloudy or overcast 49% of the time.
The average probability that some form of precipitation will be observed in a given day is 55%, with little variation over the course of the month.
Throughout August, the most common forms of precipitation are thunderstorms, drizzle, moderate rain, and light rain.
Thunderstorms are the most severe precipitation observed during 33% of those days with precipitation. They are most likely around August 16, when it is observed during 19% of all days.
Drizzle is the most severe precipitation observed during 32% of those days with precipitation. It is most likely around August 1, when it is observed during 18% of all days.
Moderate rain is the most severe precipitation observed during 19% of those days with precipitation. It is most likely around August 25, when it is observed during 11% of all days.
Light rain is the most severe precipitation observed during 16% of those days with precipitation. It is most likely around August 1, when it is observed during 10% of all days.
Either snow is exceptionally unlikely to fall at this location in August or this station does not reliably report precipitation types.
The relative humidity typically ranges from 48% (comfortable) to 89% (very humid) over the course of a typical August, rarely dropping below 38% (comfortable) and reaching as high as 96% (very humid).
The air is driest around August 1, at which time the relative humidity drops below 53% (mildly humid) three days out of four; it is most humid around August 27, rising above 86% (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 August, the dew point typically varies from 69°F (muggy) to 78°F (oppressive) and is rarely below 65°F (muggy) or above 79°F (oppressive).
Over the course of August typical wind speeds vary from 0 mph to 15 mph (calm to moderate breeze), rarely exceeding 19 mph (fresh breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around August 2, at which time the average daily maximum wind speed is 15 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around August 29, at which time the average daily maximum wind speed is 14 mph (moderate breeze).