September is one of the warmer months of the year in Thoothukudi, with average highs near 35.3°C and lows around 23.3°C (mean 29.3°C). It is a relatively wet time of year, averaging 115 mm of rainfall and 75% relative humidity across the period.
September is one of the warmer months of the year in Thoothukudi. Across 45 years of records, the warmest September in Thoothukudi was 2016 — when the month averaged 31.3°C — while the coldest was 1988 at 27.1°C. Typical September days reach 35.3°C with nights near 23.3°C. The long-term trend is warming, about 0.7°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.3°C | 28.6°C | 29.0°C | 30.7°C | 30.4°C | +2.1°C |
| Avg High | 33.9°C | 34.1°C | 34.8°C | 37.5°C | 36.7°C | +2.8°C |
| Avg Low | 22.7°C | 23.1°C | 23.2°C | 23.8°C | 24.1°C | +1.4°C |
| Avg Rain | 177 mm | 113 mm | 148 mm | 63 mm | 57 mm | -120 mm |
September temperatures in Thoothukudi have risen by about 2.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 21.5°C (2006) to a record high of 39°C (2016).
Rainfall in September is a relatively wet time of year, averaging 115 mm, with a wettest year of 419 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 1°C per decade while lows rose 0.4°C per decade, widening the gap between day and night.
A good time to visit Thoothukudi
September is a good time to visit Thoothukudi, with days averaging 35.3°C and nights around 23.3°C (mean 29.3°C, close to Thoothukudi's yearly average) and higher rainfall. January and December are marginally more temperate, but September still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 37.2°C | 24.7°C | 31.0°C | 42 mm | 69% | 3.8 m/s | 5.7 |
| 2024 | 37.6°C | 24.9°C | 31.2°C | 39 mm | 70% | 4.2 m/s | 5.9 |
| 2023 | 36.2°C | 24.4°C | 30.3°C | 76 mm | 72% | 4 m/s | 5.7 |
| 2022 | 37.5°C | 23.7°C | 30.6°C | 41 mm | 70% | 3.5 m/s | 5.9 |
| 2021 | 36.3°C | 23.5°C | 29.9°C | 81 mm | 72% | 3.6 m/s | 5.9 |
| 2020 | 35.1°C | 23.6°C | 29.3°C | 65 mm | 74% | 4.1 m/s | 5.3 |
| 2019 | 37.0°C | 23.8°C | 30.4°C | 115 mm | 75% | 3.5 m/s | 5.6 |
| 2018 | 38.3°C | 23.0°C | 30.6°C | 45 mm | 66% | 3.1 m/s | 6 |
| 2017 | 34.8°C | 23.9°C | 29.3°C | 126 mm | 79% | 3.3 m/s | 5.9 |
| 2016 🔥 | 39.0°C | 23.7°C | 31.3°C | 9 mm | 62% | 4.4 m/s | 6.3 |
| 2015 | 37.9°C | 24.2°C | 31.0°C | 102 mm | 72% | 3.5 m/s | 5.9 |
| 2014 | 37.6°C | 24.4°C | 31.0°C | 75 mm | 71% | 3.6 m/s | 6.2 |
| 2013 | 37.6°C | 23.7°C | 30.7°C | 18 mm | 70% | 4.5 m/s | 5.9 |
| 2012 | 37.5°C | 24.5°C | 31.0°C | 23 mm | 64% | 4.4 m/s | 6.2 |
| 2011 | 38.5°C | 23.8°C | 31.2°C | 26 mm | 65% | 4.4 m/s | 6.3 |
| 2010 | 36.8°C | 23.3°C | 30.1°C | 89 mm | 69% | 3.4 m/s | 5.9 |
| 2009 | 37.4°C | 24.0°C | 30.7°C | 40 mm | 71% | 4.3 m/s | 6.2 |
| 2008 | 35.4°C | 22.3°C | 28.9°C | 58 mm | 75% | 3.7 m/s | 6.4 |
| 2007 | 33.5°C | 23.7°C | 28.6°C | 103 mm | 79% | 3.9 m/s | 5.8 |
| 2006 | 32.9°C | 21.5°C | 27.2°C | 298 mm | 84% | 3.4 m/s | 5.9 |
| 2005 | 33.8°C | 23.5°C | 28.6°C | 153 mm | 82% | 4 m/s | 6 |
| 2004 | 34.3°C | 23.0°C | 28.7°C | 288 mm | 84% | 2.8 m/s | 5.8 |
| 2003 | 36.0°C | 23.8°C | 29.9°C | 37 mm | 73% | 3.6 m/s | 6.5 |
| 2002 | 37.8°C | 23.7°C | 30.7°C | 23 mm | 65% | 4 m/s | 6.6 |
| 2001 | 34.0°C | 22.6°C | 28.3°C | 335 mm | 81% | 3.3 m/s | 6.2 |
| 2000 | 32.4°C | 23.5°C | 28.0°C | 142 mm | 83% | 3 m/s | 6 |
| 1999 | 35.6°C | 23.2°C | 29.4°C | 39 mm | 74% | 3.5 m/s | 6.3 |
| 1998 | 32.0°C | 23.3°C | 27.6°C | 283 mm | 86% | 3.9 m/s | 5.9 |
| 1997 | 33.7°C | 23.2°C | 28.4°C | 241 mm | 83% | 3.3 m/s | 5.6 |
| 1996 | 32.5°C | 23.4°C | 27.9°C | 115 mm | 82% | 3.8 m/s | 4.9 |
| 1995 | 36.0°C | 23.3°C | 29.6°C | 41 mm | 72% | 4.1 m/s | 5.2 |
| 1994 | 34.5°C | 22.3°C | 28.4°C | 98 mm | 80% | 3.1 m/s | 5.6 |
| 1993 | 35.2°C | 23.0°C | 29.1°C | 37 mm | 73% | 3.4 m/s | 5.6 |
| 1992 | 32.4°C | 22.7°C | 27.5°C | 138 mm | 82% | 3.2 m/s | 5.2 |
| 1991 | 33.6°C | 22.9°C | 28.3°C | 67 mm | 79% | 3.1 m/s | 5.6 |
| 1990 | 35.4°C | 23.2°C | 29.3°C | 69 mm | 70% | 3.3 m/s | 5.4 |
| 1989 | 33.1°C | 22.2°C | 27.6°C | 236 mm | 82% | 3.5 m/s | 5.3 |
| 1988 ❄️ | 31.5°C | 22.7°C | 27.1°C | 323 mm | 87% | 3.5 m/s | 5.1 |
| 1987 | 34.8°C | 23.3°C | 29.1°C | 142 mm | 80% | 3.2 m/s | 5.4 |
| 1986 | 35.0°C | 23.1°C | 29.1°C | 87 mm | 74% | 3.8 m/s | 5.6 |
| 1985 | 35.7°C | 22.7°C | 29.2°C | 98 mm | 74% | 3.5 m/s | 5.6 |
| 1984 | 36.1°C | 22.8°C | 29.5°C | 69 mm | 70% | 3.2 m/s | 5.7 |
| 1983 | 33.0°C | 22.4°C | 27.7°C | 195 mm | 80% | 3.6 m/s | — |
| 1982 | 34.1°C | 21.8°C | 28.0°C | 29 mm | 76% | 3.6 m/s | — |
| 1981 🌧️ | 31.4°C | 23.0°C | 27.2°C | 419 mm | 86% | 3.3 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 35.3°C with lows near 23.3°C (mean 29.3°C), based on 45 years of NASA POWER data.
September averages 115 mm of rainfall in Thoothukudi, a relatively wet time of year. The wettest on record was 419 mm in 1981.
The hottest September reached 39°C in 2016. The coldest dipped to 21.5°C in 2006.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2.3°C. Daytime highs moved from 34.1°C to 37°C and overnight lows from 22.5°C to 24.2°C over the same span.
September is one of the warmer months of the year in Thoothukudi and a relatively wet time of year, so plan for around 35.3°C daytime highs and 23.3°C at night.
Not quite — September is the 8th coolest month in Thoothukudi, averaging 29.3°C.
For September in Thoothukudi, pack light, breathable clothing and sun protection, with typical highs of 35.3°C and lows of 23.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 75% — quite humid.
Average wind speed in September is 3.6 m/s. The windiest September on record averaged 4.5 m/s (2013).
The wettest September on record was 1981 with 419 mm. On average, September sees 115 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 Thoothukudi behaves each September, 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 September specifically, along with year-by-year records and how the month has changed over the decades.
