July is one of the warmer months of the year in Chengalpattu, with average highs near 33.3°C and lows around 26.4°C (mean 29.9°C). It is about average for rainfall, averaging 97 mm of rainfall and 69% relative humidity across the period.
July is one of the warmer months of the year in Chengalpattu. Across 45 years of records, the warmest July in Chengalpattu was 2002 — when the month averaged 31.5°C — while the coldest was 1985 at 28.5°C. Typical July days reach 33.3°C with nights near 26.4°C. The long-term July temperature trend is broadly flat.
July is about average for rainfall in Chengalpattu, averaging 97 mm of rainfall. The wettest July on record was 2021 with 204 mm, while the driest was 1987 at 32 mm.
Relative humidity in Chengalpattu during July averages 69%. The most humid July was 2020 at 78%, and the least humid was 2009 at 60%.
July receives about 5.1 kWh/m²/day of solar energy in Chengalpattu. The sunniest July was 2015 at 6 kWh/m²/day, and the cloudiest were 1994, 1996 and 2013 at 4.6.
Average wind speed in Chengalpattu during July is 3.8 m/s. The windiest July was 1994 at 4.7 m/s, while the calmest were 2017 and 2020 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 29.5°C | 29.8°C | 30.2°C | 30.1°C | 29.6°C | +0.1°C |
| Avg High | 32.8°C | 33.4°C | 33.7°C | 33.7°C | 32.9°C | +0.1°C |
| Avg Low | 26.2°C | 26.2°C | 26.7°C | 26.5°C | 26.4°C | +0.2°C |
| Avg Rain | 111 mm | 68 mm | 92 mm | 97 mm | 133 mm | +22 mm |
July temperatures in Chengalpattu have risen by about 0.7°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 23.8°C (1989) to a record high of 38.1°C (1987).
Rainfall in July is about average for rainfall, averaging 97 mm, with a wettest year of 204 mm.
A good time to visit Chengalpattu
July is a good time to visit Chengalpattu, with days averaging 33.3°C and nights around 26.4°C (mean 29.9°C, warmer than Chengalpattu's yearly average) and higher rainfall. January and February are marginally more temperate, but July still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 34.5°C | 30.6°C | 26.8°C | 36.8°C | 25.0°C | 78 mm | 66% | 3.6 m/s | 5.2 |
| 2024 | 33.7°C | 30.1°C | 26.4°C | 36.4°C | 25.6°C | 130 mm | 71% | 4.3 m/s | 4.7 |
| 2023 | 33.1°C | 29.7°C | 26.3°C | 36.6°C | 24.9°C | 108 mm | 73% | 3.7 m/s | 4.8 |
| 2022 | 32.5°C | 29.4°C | 26.3°C | 35.0°C | 25.4°C | 117 mm | 74% | 3.2 m/s | 5.1 |
| 2021 🌧️ | 32.0°C | 29.1°C | 26.2°C | 34.5°C | 25.0°C | 204 mm | 78% | 3.5 m/s | 5.4 |
| 2020 | 31.3°C | 28.9°C | 26.6°C | 34.6°C | 25.8°C | 164 mm | 78% | 3.1 m/s | 5.1 |
| 2019 | 33.4°C | 30.2°C | 26.9°C | 36.3°C | 25.6°C | 138 mm | 70% | 3.4 m/s | 5.2 |
| 2018 | 34.4°C | 30.6°C | 26.8°C | 36.0°C | 25.7°C | 69 mm | 66% | 3.9 m/s | 5 |
| 2017 | 34.6°C | 30.9°C | 27.2°C | 36.9°C | 26.0°C | 126 mm | 66% | 3.1 m/s | 5.2 |
| 2016 | 32.6°C | 29.4°C | 26.2°C | 35.2°C | 24.7°C | 90 mm | 73% | 3.5 m/s | 5.4 |
| 2015 | 35.1°C | 31.2°C | 27.2°C | 37.8°C | 25.6°C | 84 mm | 65% | 3.5 m/s | 6 |
| 2014 | 34.4°C | 30.6°C | 26.8°C | 36.7°C | 25.6°C | 45 mm | 65% | 4.2 m/s | 5.4 |
| 2013 | 33.1°C | 29.4°C | 25.7°C | 35.4°C | 24.7°C | 90 mm | 70% | 4.1 m/s | 4.6 |
| 2012 | 33.5°C | 30.0°C | 26.4°C | 36.0°C | 25.5°C | 91 mm | 69% | 3.2 m/s | 5.5 |
| 2011 | 33.4°C | 29.8°C | 26.1°C | 35.6°C | 24.4°C | 136 mm | 68% | 3.8 m/s | 5.4 |
| 2010 | 32.2°C | 29.1°C | 25.9°C | 34.5°C | 25.0°C | 102 mm | 73% | 3.4 m/s | 4.8 |
| 2009 | 34.8°C | 31.1°C | 27.3°C | 36.6°C | 26.2°C | 92 mm | 60% | 4.6 m/s | 5.2 |
| 2008 | 33.4°C | 30.1°C | 26.7°C | 36.7°C | 25.5°C | 63 mm | 68% | 3.6 m/s | 5.6 |
| 2007 | 33.0°C | 29.9°C | 26.8°C | 36.2°C | 25.4°C | 151 mm | 71% | 3.5 m/s | 5.1 |
| 2006 | 34.7°C | 30.6°C | 26.5°C | 37.0°C | 24.6°C | 90 mm | 65% | 4.1 m/s | 5.4 |
| 2005 | 33.9°C | 30.5°C | 27.1°C | 36.3°C | 25.7°C | 61 mm | 66% | 4 m/s | 5.2 |
| 2004 | 31.7°C | 28.7°C | 25.6°C | 34.6°C | 24.4°C | 61 mm | 75% | 3.6 m/s | 5.4 |
| 2003 | 32.3°C | 29.3°C | 26.3°C | 34.3°C | 25.4°C | 122 mm | 73% | 3.5 m/s | 4.8 |
| 2002 🔥 | 35.5°C | 31.5°C | 27.5°C | 37.6°C | 26.0°C | 40 mm | 61% | 3.9 m/s | 5.6 |
| 2001 | 33.8°C | 30.2°C | 26.6°C | 37.0°C | 24.6°C | 128 mm | 67% | 4.1 m/s | 5.5 |
| 2000 | 33.6°C | 30.0°C | 26.4°C | 36.8°C | 24.6°C | 109 mm | 67% | 3.8 m/s | 5.4 |
| 1999 | 33.3°C | 29.7°C | 26.1°C | 35.4°C | 24.7°C | 53 mm | 69% | 4.4 m/s | 5.5 |
| 1998 | 33.4°C | 30.1°C | 26.8°C | 37.0°C | 25.6°C | 88 mm | 70% | 3.5 m/s | 5.1 |
| 1997 | 34.5°C | 30.6°C | 26.7°C | 37.6°C | 25.7°C | 63 mm | 66% | 4.2 m/s | 4.9 |
| 1996 | 31.8°C | 28.7°C | 25.6°C | 34.5°C | 24.9°C | 58 mm | 76% | 3.8 m/s | 4.6 |
| 1995 | 32.5°C | 29.3°C | 26.1°C | 34.9°C | 24.9°C | 106 mm | 73% | 3.7 m/s | 4.7 |
| 1994 | 33.6°C | 29.9°C | 26.2°C | 35.8°C | 25.2°C | 61 mm | 67% | 4.7 m/s | 4.6 |
| 1993 | 33.6°C | 29.9°C | 26.3°C | 36.7°C | 25.3°C | 78 mm | 67% | 4.4 m/s | 4.9 |
| 1992 | 33.1°C | 29.8°C | 26.4°C | 35.7°C | 24.9°C | 68 mm | 69% | 3.8 m/s | 5 |
| 1991 | 33.7°C | 29.8°C | 26.0°C | 35.7°C | 24.6°C | 48 mm | 66% | 4.6 m/s | 4.7 |
| 1990 | 34.0°C | 30.0°C | 26.0°C | 36.5°C | 24.0°C | 62 mm | 66% | 3.8 m/s | 5.2 |
| 1989 | 32.1°C | 29.0°C | 25.9°C | 35.4°C | 23.8°C | 112 mm | 72% | 3.8 m/s | 5 |
| 1988 | 32.6°C | 29.5°C | 26.4°C | 35.6°C | 25.2°C | 107 mm | 71% | 3.8 m/s | 4.7 |
| 1987 | 34.5°C | 30.9°C | 27.3°C | 38.1°C | 26.1°C | 32 mm | 64% | 3.6 m/s | 5.4 |
| 1986 | 33.9°C | 30.2°C | 26.6°C | 36.8°C | 25.3°C | 55 mm | 63% | 3.7 m/s | 5.4 |
| 1985 ❄️ | 31.6°C | 28.5°C | 25.3°C | 35.0°C | 24.3°C | 131 mm | 71% | 3.2 m/s | 5.1 |
| 1984 | 32.1°C | 28.8°C | 25.6°C | 36.7°C | 24.4°C | 171 mm | 70% | 3.8 m/s | 5.3 |
| 1983 | 33.4°C | 30.0°C | 26.6°C | 37.1°C | 25.6°C | 85 mm | 65% | 3.8 m/s | — |
| 1982 | 32.6°C | 29.1°C | 25.7°C | 37.0°C | 24.0°C | 127 mm | 70% | 3.8 m/s | — |
| 1981 | 32.3°C | 29.3°C | 26.3°C | 35.9°C | 24.7°C | 180 mm | 70% | 3.5 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 33.3°C with lows near 26.4°C (mean 29.9°C), based on 45 years of NASA POWER data.
July averages 97 mm of rainfall in Chengalpattu, about average for rainfall. The wettest on record was 204 mm in 2021.
The hottest July reached 38.1°C in 1987. The coldest dipped to 23.8°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 0.7°C. Daytime highs moved from 32.4°C to 33.2°C and overnight lows from 25.9°C to 26.4°C over the same span.
July is one of the warmer months of the year in Chengalpattu and about average for rainfall, so plan for around 33.3°C daytime highs and 26.4°C at night.
Not quite — July is the 9th coolest month in Chengalpattu, averaging 29.9°C.
For July in Chengalpattu, pack light, breathable clothing and sun protection, with typical highs of 33.3°C and lows of 26.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 69% — moderately humid.
Average wind speed in July is 3.8 m/s. The windiest July on record averaged 4.7 m/s (1994).
The wettest July on record was 2021 with 204 mm. On average, July sees 97 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 Chengalpattu behaves each July, 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 July specifically, along with year-by-year records and how the month has changed over the decades.
