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Historical Weather For 2016 in New Delhi, India

Location

This report describes the historical weather record at the Indira Gandhi International Airport (New Delhi, India) during 2016. This station has records back to March 1975.

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%)

Calendar

Daylight saving time (DST) was not observed at New Delhi during 2016.

2016 was a leap year and thus has 366 days rather than the normal 365. Leap years occur every fourth year and the extra day is always February 29th. In 2016 February 29th falls on a Monday.

The summer and winter solstices and the spring and fall equinoxes mark the passing of the seasons. They fall on nearly the same day each year, with differences of a day or two depending on the year. In 2016 they occurred on:

Spring Equinox Sunday, 20 March 2016.
Summer Solstice Monday, 20 June 2016.
Fall Equinox Thursday, 22 September 2016.
Winter Solstice Wednesday, 21 December 2016.

Temperature

The hottest day of 2016 was May 18, with a high temperature of 117°F. For reference, on that day the average high temperature is 104°F and the high temperature exceeds 111°F only one day in ten. The hottest month of 2016 was May with an average daily high temperature of 105°F.

Relative to the average, the hottest day was November 29. The high temperature that day was 95°F, compared to the average of 78°F, a difference of 17°F. In relative terms the warmest month was April, with an average high temperature of 104°F, compared to an typical value of 98°F.

The longest warm spell was from February 19 to March 14, constituting 25 consecutive days with warmer than average high temperatures. The month of April had the largest fraction of warmer than average days with 93% days with higher than average high temperatures.

Temperature

The daily low (blue) and high (red) temperature during 2016 with the area between them shaded gray and superimposed over the corresponding averages (thick lines), and with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile). The bar at the top of the graph is red where both the daily high and low are above average, blue where they are both below average, and white otherwise.

The coldest day of 2016 was January 22, with a low temperature of 37°F. For reference, on that day the average low temperature is 48°F and the low temperature drops below 42°F only one day in ten. The coldest month of 2016 was January with an average daily low temperature of 49°F.

Relative to the average, the coldest day was January 22. The low temperature that day was 37°F, compared to the average of 48°F, a difference of 10°F. In relative terms the coldest month was July, with an average low temperature of 81°F, compared to an typical value of 82°F.

The longest cold spell was from October 28 to November 13, constituting 17 consecutive days with cooler than average low temperatures. The month of November had the largest fraction of cooler than average days with 73% days with lower than average low temperatures.

Hourly Temperature Bands

The full year of hourly temperature reports with the days of the year on the horizontal and the hours of the day on the vertical. The hourly temperature measurement is color coded into meaningful temperature bands: frigid is purple (below 15°F), freezing is blue (15°F to 32°F), cold is dark green (32°F to 50°F), cool is light green (50°F to 65°F), comfortable is yellow (65°F to 75°F), warm is light red (75°F to 85°F), hot is medium red (85°F to 100°F), sweltering is dark red (above 100°F), and missing data is pink.
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March 2017
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April 2017
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May 2017
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June 2017
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July 2017
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August 2017
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Clouds

The clearest month of 2016 was October, with 87% of days being more clear than cloudy. The longest spell of clear weather was from October 7 to November 11, constituting 36 consecutive days that were clearer than they were cloudy.

Cloud Coverage

The fraction of time spent in each of the five sky cover categories over the course of 2016 on a daily basis. From top (most blue) to bottom (most gray), the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data. The bar at the top of the graph is gray if the sky was cloudy or mostly cloudy for more than half the day, blue if it is clear or mostly clear for more than half the day, and blue-gray otherwise.

The cloudiest month of 2016 was July, with 52% of days being more cloudy than clear. The longest spell of cloudy weather was from July 27 to August 3, constituting 8 consecutive days that were cloudier than they were clear.

Hourly Cloud Coverage

The full year of hourly cloud coverage reports with the days of the year on the horizontal and the hours of the day on the vertical. The sky cover is color coded: from most blue to most gray, the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

Precipitation

This station provides hourly reports of significant weather events at and around the station, but does not report the quantity of precipitation at the station itself. This is common for weather stations located outside of the United States, and for a small subset of stations in the United States that are located at lesser used and smaller airports.

Present Weather Reports

This station reports when significant weather events (including precipitation) are visually observed at or near the station. Such events do not always correspond to measured quantities of liquid equivalent precipitation, such as when the event is near by not at the station, or in the case of solid precipitation that does not melt in the collection basin.

The day in 2016 with the most precipitation observations was July 30. There were 14 hourly weather reports that day (out of a maximum of 24) in which some form of precipitation was observated at or near the station. The month with the most precipitation observations was July, with 98 hourly present weather reports involving some form of precipitation.

Precipitation Reports

The daily number of hourly observed precipitation reports during 2016, color coded according to precipitation type, and stacked in order of severity. From the bottom up, the categories are thunderstorms (orange); heavy, moderate, and light snow (dark to light blue); heavy, moderate, and light rain (dark to light green); and drizzle (lightest green). Not all categories are necessarily present in this particular graph. The faint shaded areas indicate climate normals. The bar at the top of the graph is green if any precipitation was observed that day and white otherwise.

As determined by the present weather reports, the longest dry spell was from October 5 to December 31, constituting 88 consecutive days with no observed precipitation. The months of November and December were completely without observed precipitation.

The month with the largest fraction of days with at least some observed precipitation was July, with 65% of days reporting some observed precipitation.

Hourly Weather Reports

The full year of hourly present weather reports with the days of the year on the horizontal and the hours of the day on the vertical. The color-coded categories are thunderstorms (orange); heavy, moderate, and light snow (dark to light blue); heavy, moderate, and light rain (dark to light green); drizzle (lightest green); freezing rain and sleet (light and dark cyan); snow grains (lightest blue); hail (red); fog (gray); and haze (brownish gray).

Snow

Either snow is exceptionally rare at this location or this station did not reliably report it during 2016.

Humidity

Humidity is an important factor in determining how weather conditions feel to a person experiencing them. Hot and humid days feel even hotter than hot and dry days because the high level of water content in humid air discourages the evaporation of sweat from a person's skin.

When reading the graph below, keep in mind that the hottest part of the day tends to be the least humid, so the daily low (brown) traces are more relevant for understanding daytime comfort than the daily high (blue) traces, which typically occur during the night. Applying that observation, the least humid month of 2016 was April with an average daily low humidity of 12%, and the most humid month was July with an average daily low humidity of 61%.

But it is important to keep in mind that humidity does not tell the whole picture and the dew point is often a better measure of how comfortable a person will find a given set of weather conditions. Please see the next section for continued discussion of this point.

Humidity

The daily low (brown) and high (blue) relative humidity during 2016 with the area between them shaded gray and superimposed over the corresponding averages (thick lines), and with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Dew Point

Dew point is the temperature below which water vapor will condense into liquid water. It is therefore also related to the rate of evaporation of liquid water. Since the evaporation of sweat is an important cooling mechanism for the human body, the dew point is an important measurement for understanding how dry, comfortable, or humid a given set of weather conditions will feel.

Generally speaking, dew points below 50°F will feel a bit dry to some people, but comfortable to people accustomed to dry conditions; dew points from 50°F to 68°F are fairly comfortable to most people, and dew points above 68°F are increasingly uncomfortable, becoming oppressive around 77°F.

To take some examples, and basing our categorization on the daily high dew point in 2016, January had 5 dry days, 26 comfortable days, and no humid days; April had 1 dry day, 28 comfortable days, and 1 humid day; July had no dry days, no comfortable days, and 31 humid days; and October had no dry days, 20 comfortable days, and 11 humid days.

Dew Point

The daily low (blue) and high (red) dew point during 2016 with the area between them shaded gray and superimposed over the corresponding averages (thick lines), and with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Wind

The highest sustained wind speed was 34 mph, occurring on June 17; the highest daily mean wind speed was 11 mph (March 22); and the highest wind gust speed was 46 mph (June 17).

The windiest month was June, with an average wind speed of 8 mph. The least windy month was October, with an average wind speed of 4 mph.

Wind Speed

The daily low and high wind speed (light gray area) and the maximum daily wind gust speed (tiny blue dashes).

Visibility

Visibility is the maximum distance at which a given reference object or light can be clearly discerned. In the United States, visibilities that are greater than or equal to 10 miles are typically reported as 10 miles.

The day of 2016 with the lowest average visibility was January 8, with an average visibility of 0.2 mi. The month with the lowest average visibility was January, with an average visibility of 0.6 mi. With an average visibility of 2.4 mi, the month of September had the highest average visibility.

Visibility

The daily average visibility, depicted as gray bars encroaching down from the top of the graph.

Cloud Ceiling

The cloud ceiling is the altitude of the lowest layer of clouds that are at categorized as broken (mostly cloudy) or overcast (cloudy). If no such cloud layer exists then the ceiling is unlimited and no value is reported.

The day of 2016 with the lowest average cloud ceiling was May 4, with an average cloud ceiling of 4801'. The month with the lowest average cloud ceiling was August, with an average cloud ceiling of 9252'. The month of January has the highest average cloud ceiling, with an average cloud ceiling of 10000'.

Cloud Ceiling

The daily average cloud ceiling, depicted as gray bars encroaching down from the top of the graph. Missing data or days with insufficient clouds to define a cloud ceiling are shown as white columns.