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Average Weather in August in Chennai India

In Chennai, the month of August is characterized by essentially constant daily high temperatures, with daily highs around 92°F throughout the month, rarely exceeding 96°F or dropping below 88°F.

Daily low temperatures are around 80°F, rarely falling below 76°F or exceeding 83°F.

For reference, on May 24, the hottest day of the year, temperatures in Chennai typically range from 83°F to 98°F, while on January 17, the coldest day of the year, they range from 71°F to 84°F.

Average High and Low Temperature in August

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in August

Average Hourly Temperature in August in Chennai18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM4 AM8 AM12 PM4 PM8 PM12 AMJulSephotwarm
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

The month of August in Chennai experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 94% throughout the month.

The clearest day of the month is August 31, with clear, mostly clear, or partly cloudy conditions 8% of the time.

For reference, on June 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 97%, while on February 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%.

Cloud Cover Categories in August

Cloud Cover Categories in August in Chennai1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSepAug 15%Aug 15%Aug 318%Aug 318%Aug 116%Aug 116%Aug 217%Aug 217%overcastmostly cloudypartly cloudymostly clear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Chennai, the chance of a wet day over the course of August is gradually decreasing, starting the month at 41% and ending it at 39%.

For reference, the year's highest daily chance of a wet day is 54% on November 3, and its lowest chance is 2% on February 1.

Probability of Precipitation in August

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during August in Chennai is gradually increasing, starting the month at 3.3 inches, when it rarely exceeds 5.6 inches or falls below 1.2 inches, and ending the month at 3.6 inches, when it rarely exceeds 6.6 inches or falls below 0.9 inches.

Average Monthly Rainfall in August

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

Over the course of August in Chennai, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 19 minutes, implying an average daily decrease of 38 seconds, and weekly decrease of 4 minutes, 25 seconds.

The shortest day of the month is August 31, with 12 hours, 23 minutes of daylight and the longest day is August 1, with 12 hours, 42 minutes of daylight.

Hours of Daylight and Twilight in August

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Chennai is 5:54 AM on August 1 and the latest sunrise is 3 minutes later at 5:57 AM on August 31.

The latest sunset is 6:36 PM on August 1 and the earliest sunset is 16 minutes earlier at 6:20 PM on August 31.

Daylight saving time is not observed in Chennai during 2017.

For reference, on June 21, the longest day of the year, the Sun rises at 5:43 AM and sets 12 hours, 54 minutes later, at 6:37 PM, while on December 21, the shortest day of the year, it rises at 6:26 AM and sets 11 hours, 21 minutes later, at 5:47 PM.

Sunrise & Sunset with Twilight in August

The solar day over the course of August. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Chennai is essentially constant during August, remaining around 100% throughout.

For reference, on April 19, the muggiest day of the year, there are muggy conditions 100% of the time, while on January 15, the least muggy day of the year, there are muggy conditions 82% of the time.

Humidity Comfort Levels in August

Humidity Comfort Levels in August in Chennai1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%10%20%30%40%50%60%70%80%90%100%JulSepAug 18100%Aug 18100%Aug 1100%Aug 1100%Aug 31100%Aug 31100%muggymuggymiserablemiserableoppressiveoppressive
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Chennai is gradually decreasing during August, decreasing from 6.0 miles per hour to 5.3 miles per hour over the course of the month.

For reference, on June 19, the windiest day of the year, the daily average wind speed is 6.4 miles per hour, while on October 10, the calmest day of the year, the daily average wind speed is 4.2 miles per hour.

Average Wind Speed in August

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in Chennai throughout August is predominantly from the west, with a peak proportion of 66% on August 2.

Wind Direction in August

Wind Direction in August in ChennaiWS1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSepwestsoutheastnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Chennai is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Chennai is essentially constant during August, remaining around 84°F throughout.

The lowest average surface water temperature during August is 84°F on August 10.

Average Water Temperature in August

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Chennai is essentially constant during August, remaining around 4.3 kWh throughout.

The highest average daily incident shortwave solar energy during August is 4.3 kWh on August 17.

Average Daily Incident Shortwave Solar Energy in August

Average Daily Incident Shortwave Solar Energy in August in Chennai1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 kWh0.5 kWh1.0 kWh1.5 kWh2.0 kWh2.5 kWh3.0 kWh3.5 kWh4.0 kWh4.5 kWh5.0 kWh5.5 kWh6.0 kWh6.5 kWhJulSepAug 174.3 kWhAug 174.3 kWhAug 14.3 kWhAug 14.3 kWhAug 314.2 kWhAug 314.2 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Chennai are 13.088 deg latitude, 80.278 deg longitude, and 23 ft elevation.

The topography within 2 miles of Chennai is essentially flat, with a maximum elevation change of 89 feet and an average elevation above sea level of 23 feet. Within 10 miles is essentially flat (295 feet). Within 50 miles contains only modest variations in elevation (2,887 feet).

The area within 2 miles of Chennai is covered by artificial surfaces (83%) and water (17%), within 10 miles by water (48%) and artificial surfaces (42%), and within 50 miles by water (61%) and cropland (32%).

Data Sources

This report illustrates the typical weather in Chennai year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There is only a single weather station, Chennai International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Chennai.

At a distance of 15 kilometers from Chennai, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and Chennai according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.