This report describes the typical weather at the Indira Gandhi International Airport (New Delhi, India) weather station over the course of an average year. It is based on the historical records from 1996 to 2012. Earlier records are either unavailable or unreliable.
New Delhi has a hot semi-arid steppe climate. The area within 25 mi of this station is covered by croplands (87%) and built-up areas (9%).
Over the course of a year, the temperature typically varies from 46Â°F to 104Â°F and is rarely below 40Â°F or above 112Â°F.
The warm season lasts from April 9 to July 8 with an average daily high temperature above 97Â°F. The hottest day of the year is May 22, with an average high of 104Â°F and low of 82Â°F.
The cold season lasts from December 11 to February 11 with an average daily high temperature below 73Â°F. The coldest day of the year is January 4, with an average low of 46Â°F and high of 66Â°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 10:19 hours of daylight; the longest day is June 20 with 13:58 hours of daylight.
The earliest sunrise is at 5:23am on June 8 and the latest sunset is at 7:24pm on June 26. The latest sunrise is at 7:16am on January 12 and the earliest sunset is at 5:24pm on November 30.
Daylight savings time (DST) is not observed in 2012.
The median cloud cover ranges from 2% (clear) to 64% (partly cloudy). The sky is cloudiest on July 28 and clearest on November 5. The clearer part of the year begins around September 18. The cloudier part of the year begins around May 31.
On November 5, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 76% of the time, and overcast or mostly cloudy 4% of the time.
On July 28, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 72% of the time, and clear or mostly clear 23% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around July 27, occurring in 51% of days. Precipitation is least likely around November 20, occurring in 4% of days.
Over the entire year, the most common forms of precipitation are thunderstorms, light rain, and moderate rain.
Thunderstorms are the most severe precipitation observed during 69% of those days with precipitation. They are most likely around July 27, when it is observed during 33% of all days.
Light rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around July 28, when it is observed during 10% of all days.
Moderate rain is the most severe precipitation observed during 11% of those days with precipitation. It is most likely around July 7, when it is observed during 6% of all days.
During the warm season, which lasts from April 9 to July 8, there is a 29% 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 (78% of days with precipitation have at worst thunderstorms), light rain (10%), and moderate rain (8%).
During the cold season, which lasts from December 11 to February 11, 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 (52% of days with precipitation have at worst thunderstorms), moderate rain (18%), drizzle (16%), and light rain (14%).
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 17% (dry) to 95% (very humid) over the course of the year, rarely dropping below 11% (very dry) and reaching as high as 100% (very humid).
The air is driest around April 19, at which time the relative humidity drops below 21% (dry) three days out of four; it is most humid around January 9, 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 41Â°F (dry) to 79Â°F (oppressive) and is rarely below 33Â°F (dry) or above 84Â°F (very oppressive).
There are two periods in the year that are most comfortable: The first is between January 19 and May 21 and the second is between October 17 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 16 mph (calm to moderate breeze), rarely exceeding 24 mph (fresh breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around May 29, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 3 mph (light air) occurs around November 2, at which time the average daily maximum wind speed is 8 mph (gentle breeze).