This report describes the typical weather at the Indira Gandhi International Airport (New Delhi, India) weather station over the course of an average January. 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%).
The month of January is characterized by rising daily high temperatures, with daily highs ranging from 66Â°F to 71Â°F over the course of the month, exceeding 78Â°F or dropping below 57Â°F only one day in ten.
Over the course of January, the length of the day is essentially constant. The shortest day of the month is January 3 with 10:22 hours of daylight; the longest day is January 31 with 10:49 hours of daylight.
The earliest sunrise is at 7:11am on January 31; the latest sunset is at 6:00pm on January 31; the latest sunrise is at 7:16am on January 12; the earliest sunset is at 5:36pm on January 1.
Daylight savings time (DST) is not observed in 2012.
The median cloud cover is 23% (mostly clear) and does not vary substantially over the course of the month.
On January 16, a representative day, the sky is clear or mostly clear 43% of the time, partly cloudy 12% of the time, and mostly cloudy or overcast 13% of the time.
The average probability that some form of precipitation will be observed in a given day is 8%, with little variation over the course of the month.
Throughout January, the most common forms of precipitation are thunderstorms, drizzle, moderate rain, and light rain.
Thunderstorms are the most severe precipitation observed during 49% of those days with precipitation. They are most likely around January 31, when it is observed during 5% of all days.
Drizzle is the most severe precipitation observed during 18% of those days with precipitation. It is most likely around January 26, when it is observed during 2% of all days.
Moderate rain is the most severe precipitation observed during 18% of those days with precipitation. It is most likely around January 28, when it is observed during 2% of all days.
Light rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around January 4, when it is observed during 1% of all days.
Either snow is exceptionally unlikely to fall at this location in January or this station does not reliably report precipitation types.
The relative humidity typically ranges from 43% (comfortable) to 95% (very humid) over the course of a typical January, rarely dropping below 26% (dry) and reaching as high as 100% (very humid).
The air is driest around January 31, at which time the relative humidity drops below 48% (comfortable) three days out of four; it is most humid around January 9, rising above 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 typical January, the dew point typically varies from 41Â°F (dry) to 51Â°F (very comfortable) and is rarely below 33Â°F (dry) or above 59Â°F (comfortable).
Over the course of January typical wind speeds vary from 0 mph to 11 mph (calm to gentle breeze), rarely exceeding 16 mph (moderate breeze).
The highest average wind speed of 5 mph (light breeze) occurs around January 31, at which time the average daily maximum wind speed is 11 mph (gentle breeze).
The lowest average wind speed of 4 mph (light breeze) occurs around January 1, at which time the average daily maximum wind speed is 8 mph (gentle breeze).