August is one of the warmer months of the year in Chennai, with average highs near 33.1°C and lows around 25.5°C (mean 29.3°C). It is a relatively wet time of year, averaging 133 mm of rainfall and 73% relative humidity across the period.
August is one of the warmer months of the year in Chennai. Across 45 years of records, the warmest August in Chennai was 1997 — when the month averaged 30.5°C — while the coldest was 2007 at 28.2°C. Typical August days reach 33.1°C with nights near 25.5°C. The long-term August temperature trend is broadly flat.
August is a relatively wet time of year in Chennai, averaging 133 mm of rainfall. The wettest August on record was 1995 with 253 mm, while the driest was 1984 at 30 mm.
Relative humidity in Chennai during August averages 73%. The most humid Augusts were 2020 and 2024 at 80%, and the least humid was 1997 at 65%.
August receives about 4.8 kWh/m²/day of solar energy in Chennai. The sunniest August was 1984 at 5.6 kWh/m²/day, and the cloudiest was 2020 at 4.
Average wind speed in Chennai during August is 3.2 m/s. The windiest Augusts were 2000 and 2004 at 3.8 m/s, while the calmest was 2023 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 29.1°C | 29.4°C | 29.5°C | 29.3°C | 29.0°C | -0.1°C |
| Avg High | 33.2°C | 33.4°C | 33.4°C | 33.1°C | 32.3°C | -0.9°C |
| Avg Low | 25.1°C | 25.5°C | 25.5°C | 25.6°C | 25.7°C | +0.6°C |
| Avg Rain | 119 mm | 128 mm | 107 mm | 155 mm | 168 mm | +49 mm |
August temperatures in Chennai have stayed relatively stable across the record.
August has ranged from a record low of 23.4°C (1996) to a record high of 38°C (1994).
Rainfall in August is a relatively wet time of year, averaging 133 mm, with a wettest year of 253 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.2°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Chennai
August is a good time to visit Chennai, with days averaging 33.1°C and nights around 25.5°C (mean 29.3°C, close to Chennai's yearly average) and higher rainfall. January and February are marginally more temperate, but August still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 32.2°C | 28.8°C | 25.4°C | 36.3°C | 24.0°C | 180 mm | 76% | 2.7 m/s | 4.7 |
| 2024 | 32.0°C | 29.0°C | 26.1°C | 35.4°C | 25.0°C | 173 mm | 80% | 2.8 m/s | 5 |
| 2023 | 33.7°C | 30.1°C | 26.4°C | 37.3°C | 25.4°C | 213 mm | 74% | 2.4 m/s | 5.4 |
| 2022 | 32.2°C | 28.9°C | 25.5°C | 36.0°C | 24.2°C | 189 mm | 77% | 2.8 m/s | 4.9 |
| 2021 | 32.1°C | 28.7°C | 25.3°C | 35.2°C | 23.8°C | 135 mm | 77% | 2.9 m/s | 4.9 |
| 2020 | 31.8°C | 28.7°C | 25.5°C | 33.7°C | 24.2°C | 121 mm | 80% | 2.7 m/s | 4 |
| 2019 | 32.9°C | 29.2°C | 25.5°C | 36.9°C | 24.0°C | 198 mm | 74% | 3.4 m/s | 4.9 |
| 2018 | 34.7°C | 30.3°C | 25.9°C | 37.5°C | 25.2°C | 127 mm | 67% | 3.2 m/s | 4.3 |
| 2017 | 31.9°C | 28.8°C | 25.7°C | 34.4°C | 24.3°C | 222 mm | 78% | 2.6 m/s | 4.8 |
| 2016 | 34.0°C | 29.7°C | 25.5°C | 36.9°C | 23.4°C | 61 mm | 70% | 3.2 m/s | 5.1 |
| 2015 | 33.4°C | 29.6°C | 25.9°C | 36.8°C | 24.3°C | 158 mm | 73% | 2.7 m/s | 5.3 |
| 2014 | 32.9°C | 29.3°C | 25.7°C | 37.2°C | 24.5°C | 158 mm | 72% | 3.2 m/s | 5 |
| 2013 | 32.5°C | 28.9°C | 25.2°C | 35.4°C | 24.2°C | 175 mm | 74% | 2.9 m/s | 4.9 |
| 2012 | 33.4°C | 29.4°C | 25.4°C | 36.3°C | 24.5°C | 123 mm | 70% | 3.2 m/s | 5.2 |
| 2011 | 32.9°C | 29.1°C | 25.4°C | 36.5°C | 24.0°C | 164 mm | 73% | 3.1 m/s | 4.9 |
| 2010 | 32.4°C | 29.0°C | 25.6°C | 36.2°C | 23.6°C | 167 mm | 76% | 2.7 m/s | 4.8 |
| 2009 | 33.3°C | 29.6°C | 25.8°C | 36.2°C | 24.8°C | 140 mm | 73% | 3.1 m/s | 5.3 |
| 2008 | 33.1°C | 29.3°C | 25.5°C | 36.4°C | 24.6°C | 108 mm | 72% | 3.1 m/s | 4.8 |
| 2007 ❄️ | 31.4°C | 28.2°C | 25.0°C | 34.4°C | 24.0°C | 189 mm | 80% | 3.1 m/s | 5 |
| 2006 | 34.1°C | 29.9°C | 25.7°C | 37.0°C | 24.6°C | 89 mm | 68% | 3.5 m/s | 5.2 |
| 2005 | 34.1°C | 30.0°C | 25.9°C | 36.7°C | 24.9°C | 79 mm | 68% | 3 m/s | 5.4 |
| 2004 | 34.7°C | 30.2°C | 25.6°C | 37.3°C | 24.7°C | 48 mm | 67% | 3.8 m/s | 5.4 |
| 2003 | 32.1°C | 28.7°C | 25.3°C | 34.8°C | 24.0°C | 142 mm | 78% | 3.1 m/s | 4.8 |
| 2002 | 34.2°C | 30.0°C | 25.8°C | 37.7°C | 24.3°C | 128 mm | 67% | 3.5 m/s | 4.9 |
| 2001 | 34.4°C | 30.0°C | 25.7°C | 37.3°C | 24.3°C | 50 mm | 68% | 3.4 m/s | 4.8 |
| 2000 | 32.6°C | 28.8°C | 25.0°C | 34.9°C | 23.9°C | 98 mm | 73% | 3.8 m/s | 4.9 |
| 1999 | 33.7°C | 29.7°C | 25.7°C | 37.0°C | 24.6°C | 136 mm | 70% | 3.3 m/s | 4.7 |
| 1998 | 31.9°C | 28.9°C | 26.0°C | 34.1°C | 25.2°C | 120 mm | 78% | 2.8 m/s | 4.6 |
| 1997 🔥 | 35.0°C | 30.5°C | 25.9°C | 37.9°C | 24.3°C | 87 mm | 65% | 3.6 m/s | 4.4 |
| 1996 | 32.4°C | 28.7°C | 25.0°C | 36.5°C | 23.4°C | 96 mm | 75% | 3.1 m/s | 4.2 |
| 1995 🌧️ | 31.9°C | 28.7°C | 25.5°C | 35.3°C | 24.1°C | 253 mm | 79% | 3 m/s | 4.7 |
| 1994 | 34.1°C | 29.9°C | 25.7°C | 38.0°C | 24.1°C | 124 mm | 68% | 3.5 m/s | 4.4 |
| 1993 | 33.2°C | 29.3°C | 25.4°C | 36.5°C | 24.2°C | 167 mm | 72% | 3.3 m/s | 4.6 |
| 1992 | 34.0°C | 29.6°C | 25.2°C | 36.7°C | 23.9°C | 90 mm | 69% | 3.7 m/s | 4.3 |
| 1991 | 33.8°C | 29.5°C | 25.2°C | 35.8°C | 23.9°C | 107 mm | 69% | 3.6 m/s | 4.4 |
| 1990 | 33.8°C | 29.5°C | 25.1°C | 36.8°C | 24.1°C | 103 mm | 69% | 3.5 m/s | 4.2 |
| 1989 | 34.4°C | 29.8°C | 25.3°C | 36.6°C | 24.5°C | 48 mm | 67% | 3.4 m/s | 4.7 |
| 1988 | 31.4°C | 28.3°C | 25.3°C | 36.1°C | 24.0°C | 220 mm | 79% | 2.9 m/s | 4.2 |
| 1987 | 32.9°C | 29.1°C | 25.3°C | 35.3°C | 24.5°C | 118 mm | 71% | 3.4 m/s | 4.5 |
| 1986 | 33.9°C | 29.6°C | 25.3°C | 37.0°C | 24.2°C | 78 mm | 67% | 3.7 m/s | 5 |
| 1985 | 32.4°C | 28.5°C | 24.6°C | 34.8°C | 23.9°C | 127 mm | 74% | 3.1 m/s | 4.8 |
| 1984 | 34.9°C | 30.0°C | 25.2°C | 37.4°C | 23.6°C | 30 mm | 66% | 3 m/s | 5.6 |
| 1983 | 33.0°C | 29.2°C | 25.4°C | 34.6°C | 24.4°C | 172 mm | 73% | 3.2 m/s | — |
| 1982 | 33.1°C | 28.9°C | 24.8°C | 35.9°C | 23.9°C | 104 mm | 72% | 3.6 m/s | — |
| 1981 | 32.4°C | 28.5°C | 24.7°C | 34.5°C | 24.0°C | 175 mm | 76% | 3.4 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 33.1°C with lows near 25.5°C (mean 29.3°C), based on 45 years of NASA POWER data.
August averages 133 mm of rainfall in Chennai, a relatively wet time of year. The wettest on record was 253 mm in 1995.
The hottest August reached 38°C in 1994. The coldest dipped to 23.4°C in 1996.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.1°C — but days and nights have moved in opposite directions. Overnight lows rose from 24.9°C to 25.7°C while daytime highs eased from 33.2°C to 32.4°C, narrowing the gap between day and night.
August is one of the warmer months of the year in Chennai and a relatively wet time of year, so plan for around 33.1°C daytime highs and 25.5°C at night.
Not quite — August is the 8th coolest month in Chennai, averaging 29.3°C.
For August in Chennai, pack light, breathable clothing and sun protection, with typical highs of 33.1°C and lows of 25.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 73% — moderately humid.
Average wind speed in August is 3.2 m/s. The windiest August on record averaged 3.8 m/s (2000).
The wettest August on record was 1995 with 253 mm. On average, August sees 133 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Chennai behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.
