May is one of the warmer months of the year in Chengalpattu, with average highs near 38.5°C and lows around 26.5°C (mean 32.5°C). It is one of the drier months, averaging 55 mm of rainfall and 67% relative humidity across the period.
May is one of the warmer months of the year in Chengalpattu. Across 45 years of records, the warmest May in Chengalpattu was 1996 — when the month averaged 34.2°C — while the coldest was 2004 at 29.8°C. Typical May days reach 38.5°C with nights near 26.5°C. The long-term trend is cooling, about 0.2°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 32.7°C | 32.7°C | 32.6°C | 32.3°C | 32.0°C | -0.7°C |
| Avg High | 39.0°C | 38.9°C | 38.6°C | 38.0°C | 37.8°C | -1.2°C |
| Avg Low | 26.4°C | 26.5°C | 26.5°C | 26.6°C | 26.2°C | -0.2°C |
| Avg Rain | 20 mm | 62 mm | 59 mm | 59 mm | 78 mm | +58 mm |
May temperatures in Chengalpattu have fallen by about 0.6°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 24.9°C (2004) to a record high of 40.8°C (1991).
Rainfall in May is one of the drier months, averaging 55 mm, with a wettest year of 294 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.3°C per decade while lows rose 0°C per decade, narrowing the gap between day and night.
A quieter season to visit Chengalpattu
If your dates are flexible, the more temperate months of January and February tend to be the most comfortable for visiting Chengalpattu. That said, May — with days averaging 38.5°C and nights around 26.5°C (mean 32.5°C) and moderate rainfall (55 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 36.0°C | 26.4°C | 31.2°C | 96 mm | 71% | 3.4 m/s | 5.3 |
| 2024 | 38.9°C | 26.5°C | 32.7°C | 57 mm | 69% | 3.4 m/s | 5.5 |
| 2023 | 39.4°C | 26.3°C | 32.8°C | 78 mm | 73% | 3 m/s | 5.9 |
| 2022 | 37.2°C | 25.6°C | 31.4°C | 93 mm | 72% | 3.3 m/s | 5.5 |
| 2021 | 37.0°C | 25.6°C | 31.3°C | 65 mm | 71% | 3.6 m/s | 6.3 |
| 2020 | 38.4°C | 26.5°C | 32.5°C | 80 mm | 70% | 3.3 m/s | 6.3 |
| 2019 | 38.7°C | 27.6°C | 33.1°C | 20 mm | 70% | 4 m/s | 6.3 |
| 2018 | 36.7°C | 26.4°C | 31.5°C | 34 mm | 70% | 3.6 m/s | 6.1 |
| 2017 | 38.8°C | 27.1°C | 32.9°C | 22 mm | 65% | 3.6 m/s | 6.1 |
| 2016 | 37.7°C | 26.0°C | 31.9°C | 171 mm | 71% | 3.9 m/s | 6 |
| 2015 | 37.2°C | 25.2°C | 31.2°C | 65 mm | 71% | 3.8 m/s | 5.7 |
| 2014 | 37.4°C | 26.3°C | 31.9°C | 87 mm | 73% | 3.6 m/s | 6 |
| 2013 | 38.7°C | 26.9°C | 32.8°C | 49 mm | 65% | 3.9 m/s | 6 |
| 2012 | 38.5°C | 27.2°C | 32.9°C | 21 mm | 65% | 3.9 m/s | 6.1 |
| 2011 | 37.3°C | 26.7°C | 32.0°C | 20 mm | 69% | 3.7 m/s | 6.6 |
| 2010 | 38.6°C | 26.9°C | 32.7°C | 104 mm | 70% | 4 m/s | 6.1 |
| 2009 | 39.7°C | 26.7°C | 33.2°C | 41 mm | 67% | 3.7 m/s | 6.1 |
| 2008 | 40.2°C | 26.6°C | 33.4°C | 19 mm | 64% | 4.2 m/s | 6.6 |
| 2007 | 39.5°C | 27.2°C | 33.3°C | 21 mm | 66% | 3.8 m/s | 6.3 |
| 2006 | 38.4°C | 25.9°C | 32.1°C | 34 mm | 68% | 4.2 m/s | 6.1 |
| 2005 | 36.8°C | 26.4°C | 31.6°C | 63 mm | 74% | 3.6 m/s | 6.3 |
| 2004 ❄️ 🌧️ | 34.7°C | 24.9°C | 29.8°C | 294 mm | 81% | 3.2 m/s | 5.6 |
| 2003 | 39.1°C | 27.2°C | 33.2°C | 38 mm | 63% | 4.1 m/s | 5.8 |
| 2002 | 39.2°C | 26.6°C | 32.9°C | 30 mm | 64% | 4.1 m/s | 6.4 |
| 2001 | 38.9°C | 27.0°C | 32.9°C | 26 mm | 63% | 4.1 m/s | 6.7 |
| 2000 | 39.7°C | 26.6°C | 33.2°C | 23 mm | 64% | 3.7 m/s | 6.4 |
| 1999 | 37.6°C | 25.8°C | 31.7°C | 41 mm | 70% | 3.8 m/s | 6.4 |
| 1998 | 39.1°C | 25.8°C | 32.4°C | 62 mm | 67% | 3.9 m/s | 5.8 |
| 1997 | 39.9°C | 26.8°C | 33.3°C | 12 mm | 61% | 3.9 m/s | 5.9 |
| 1996 🔥 | 40.8°C | 27.6°C | 34.2°C | 19 mm | 60% | 4.3 m/s | 6.1 |
| 1995 | 35.9°C | 25.2°C | 30.5°C | 181 mm | 74% | 3.8 m/s | 5.6 |
| 1994 | 40.0°C | 26.8°C | 33.4°C | 34 mm | 65% | 4.3 m/s | 6.2 |
| 1993 | 38.5°C | 26.8°C | 32.7°C | 51 mm | 65% | 4.2 m/s | 6.2 |
| 1992 | 39.6°C | 26.6°C | 33.1°C | 17 mm | 63% | 4.1 m/s | 5.9 |
| 1991 | 40.8°C | 27.3°C | 34.1°C | 3 mm | 68% | 4.5 m/s | 6.3 |
| 1990 | 36.5°C | 26.1°C | 31.3°C | 201 mm | 73% | 4.3 m/s | 5.3 |
| 1989 | 39.5°C | 27.1°C | 33.3°C | 14 mm | 61% | 4.3 m/s | 6.1 |
| 1988 | 39.4°C | 26.7°C | 33.0°C | 34 mm | 66% | 3.9 m/s | 5.7 |
| 1987 | 38.0°C | 26.2°C | 32.1°C | 5 mm | 64% | 4 m/s | 6.1 |
| 1986 | 40.7°C | 26.8°C | 33.8°C | 7 mm | 59% | 4.4 m/s | 6.2 |
| 1985 | 40.6°C | 26.5°C | 33.6°C | 9 mm | 61% | 4.3 m/s | 6.2 |
| 1984 | 37.9°C | 25.6°C | 31.7°C | 3 mm | 66% | 4.2 m/s | 6.2 |
| 1983 | 38.6°C | 27.1°C | 32.8°C | 22 mm | 65% | 4.4 m/s | — |
| 1982 | 38.2°C | 26.3°C | 32.3°C | 19 mm | 65% | 3.6 m/s | — |
| 1981 | 38.2°C | 25.6°C | 31.9°C | 69 mm | 69% | 3.8 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 38.5°C with lows near 26.5°C (mean 32.5°C), based on 45 years of NASA POWER data.
May averages 55 mm of rainfall in Chengalpattu, one of the drier months. The wettest on record was 294 mm in 2004.
The hottest May reached 40.8°C in 1991. The coldest dipped to 24.9°C in 2004.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have fallen by about 0.6°C. Daytime highs moved from 38.7°C to 37.7°C and overnight lows from 26.2°C to 26.1°C over the same span.
May is one of the warmer months of the year in Chengalpattu and one of the drier months, so plan for around 38.5°C daytime highs and 26.5°C at night.
Not quite — May is the 12th coolest month in Chengalpattu, averaging 32.5°C.
For May in Chengalpattu, pack light, breathable clothing and sun protection, with typical highs of 38.5°C and lows of 26.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 67% — moderately humid.
Average wind speed in May is 3.9 m/s. The windiest May on record averaged 4.5 m/s (1991).
The wettest May on record was 2004 with 294 mm. On average, May sees 55 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 May, 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 May specifically, along with year-by-year records and how the month has changed over the decades.
