September is one of the warmer months of the year in Tiruvannamalai, with average highs near 36.4°C and lows around 22.8°C (mean 29.6°C). It is a relatively wet time of year, averaging 129 mm of rainfall and 74% relative humidity across the period.
September is one of the warmer months of the year in Tiruvannamalai. Across 45 years of records, the warmest September in Tiruvannamalai was 2002 — when the month averaged 31.4°C — while the coldest was 1983 at 27.6°C. Typical September days reach 36.4°C with nights near 22.8°C. The long-term September temperature trend is broadly flat.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 29.4°C | 29.7°C | 29.9°C | 29.6°C | 29.2°C | -0.2°C |
| Avg High | 36.4°C | 36.5°C | 36.8°C | 36.3°C | 35.5°C | -0.9°C |
| Avg Low | 22.3°C | 22.8°C | 23.0°C | 22.9°C | 22.8°C | +0.5°C |
| Avg Rain | 142 mm | 124 mm | 120 mm | 130 mm | 134 mm | -8 mm |
September temperatures in Tiruvannamalai have risen by about 0.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 20.9°C (1983) to a record high of 39.4°C (2002).
Rainfall in September is a relatively wet time of year, averaging 129 mm, with a wettest year of 242 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.1°C per decade, narrowing the gap between day and night.
A good time to visit Tiruvannamalai
September is a good time to visit Tiruvannamalai, with days averaging 36.4°C and nights around 22.8°C (mean 29.6°C, close to Tiruvannamalai'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 | 35.8°C | 23.4°C | 29.6°C | 166 mm | 76% | 1.9 m/s | 5.2 |
| 2024 | 37.7°C | 23.4°C | 30.6°C | 52 mm | 70% | 2.1 m/s | 5.4 |
| 2023 | 36.6°C | 23.4°C | 30.0°C | 158 mm | 76% | 2.4 m/s | 5.6 |
| 2022 | 34.6°C | 22.5°C | 28.5°C | 92 mm | 77% | 1.8 m/s | 5.2 |
| 2021 | 34.4°C | 22.4°C | 28.4°C | 154 mm | 79% | 2.1 m/s | 5.2 |
| 2020 | 34.1°C | 21.9°C | 28.0°C | 181 mm | 80% | 2.2 m/s | 4.6 |
| 2019 | 35.6°C | 23.3°C | 29.4°C | 200 mm | 80% | 2.2 m/s | 5 |
| 2018 | 38.6°C | 23.0°C | 30.8°C | 101 mm | 70% | 1.8 m/s | 5.7 |
| 2017 | 34.4°C | 22.6°C | 28.5°C | 143 mm | 81% | 1.8 m/s | 5.1 |
| 2016 | 37.8°C | 23.4°C | 30.6°C | 68 mm | 68% | 1.8 m/s | 5.2 |
| 2015 | 37.9°C | 23.3°C | 30.6°C | 90 mm | 71% | 2 m/s | 5.6 |
| 2014 | 37.1°C | 22.9°C | 30.0°C | 130 mm | 73% | 1.9 m/s | 5.6 |
| 2013 | 34.0°C | 21.9°C | 28.0°C | 183 mm | 80% | 2.1 m/s | 5.4 |
| 2012 | 37.5°C | 22.8°C | 30.2°C | 110 mm | 71% | 1.9 m/s | 5.5 |
| 2011 | 35.8°C | 22.7°C | 29.3°C | 154 mm | 72% | 2 m/s | 5.9 |
| 2010 | 34.3°C | 22.8°C | 28.5°C | 126 mm | 78% | 1.9 m/s | 5.1 |
| 2009 | 37.6°C | 23.2°C | 30.4°C | 142 mm | 72% | 2.2 m/s | 5.7 |
| 2008 | 36.5°C | 22.2°C | 29.3°C | 57 mm | 73% | 2.1 m/s | 5.6 |
| 2007 | 34.1°C | 22.1°C | 28.1°C | 112 mm | 78% | 2.2 m/s | 5.5 |
| 2006 | 36.1°C | 23.3°C | 29.7°C | 77 mm | 72% | 2.6 m/s | 5.3 |
| 2005 | 37.2°C | 23.0°C | 30.1°C | 127 mm | 74% | 2.1 m/s | 5.4 |
| 2004 🌧️ | 35.6°C | 22.7°C | 29.2°C | 242 mm | 79% | 1.9 m/s | 4.9 |
| 2003 | 38.4°C | 23.7°C | 31.0°C | 83 mm | 68% | 2.2 m/s | 5.9 |
| 2002 🔥 | 39.4°C | 23.4°C | 31.4°C | 95 mm | 65% | 2.2 m/s | 6 |
| 2001 | 36.5°C | 23.2°C | 29.9°C | 138 mm | 75% | 1.9 m/s | 5.6 |
| 2000 | 36.9°C | 23.7°C | 30.3°C | 125 mm | 74% | 1.9 m/s | 5.6 |
| 1999 | 37.6°C | 22.9°C | 30.3°C | 98 mm | 67% | 2.1 m/s | 5.6 |
| 1998 | 35.1°C | 23.3°C | 29.2°C | 146 mm | 77% | 2.3 m/s | 5.3 |
| 1997 | 37.2°C | 23.4°C | 30.3°C | 104 mm | 73% | 2.1 m/s | 5.2 |
| 1996 | 33.8°C | 22.7°C | 28.3°C | 173 mm | 82% | 2.1 m/s | 5.2 |
| 1995 | 35.8°C | 23.2°C | 29.5°C | 120 mm | 73% | 2.2 m/s | 5.1 |
| 1994 | 38.9°C | 21.0°C | 30.0°C | 54 mm | 64% | 2.4 m/s | 5.8 |
| 1993 | 36.1°C | 22.8°C | 29.5°C | 93 mm | 73% | 2 m/s | 5.3 |
| 1992 | 37.1°C | 23.4°C | 30.2°C | 161 mm | 70% | 1.9 m/s | 5.1 |
| 1991 | 35.9°C | 23.1°C | 29.5°C | 117 mm | 72% | 1.9 m/s | 5.3 |
| 1990 | 37.8°C | 22.5°C | 30.2°C | 173 mm | 74% | 1.9 m/s | 5.1 |
| 1989 | 37.6°C | 22.5°C | 30.1°C | 131 mm | 71% | 2 m/s | 5 |
| 1988 | 33.9°C | 21.6°C | 27.7°C | 153 mm | 79% | 2.3 m/s | 5.2 |
| 1987 | 38.3°C | 23.7°C | 31.0°C | 88 mm | 70% | 1.9 m/s | 5.4 |
| 1986 | 37.6°C | 23.1°C | 30.4°C | 118 mm | 71% | 1.8 m/s | 5.7 |
| 1985 | 36.6°C | 22.0°C | 29.3°C | 148 mm | 74% | 1.9 m/s | 5.5 |
| 1984 | 37.9°C | 21.9°C | 29.9°C | 156 mm | 70% | 2.1 m/s | 5.5 |
| 1983 ❄️ | 34.3°C | 20.9°C | 27.6°C | 188 mm | 79% | 2.6 m/s | — |
| 1982 | 38.4°C | 22.9°C | 30.6°C | 103 mm | 66% | 2 m/s | — |
| 1981 | 33.4°C | 22.4°C | 27.9°C | 190 mm | 83% | 1.9 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 36.4°C with lows near 22.8°C (mean 29.6°C), based on 45 years of NASA POWER data.
September averages 129 mm of rainfall in Tiruvannamalai, a relatively wet time of year. The wettest on record was 242 mm in 2004.
The hottest September reached 39.4°C in 2002. The coldest dipped to 20.9°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.3°C. Daytime highs moved from 36.1°C to 35.8°C and overnight lows from 22°C to 23°C over the same span.
September is one of the warmer months of the year in Tiruvannamalai and a relatively wet time of year, so plan for around 36.4°C daytime highs and 22.8°C at night.
Not quite — September is the 7th coolest month in Tiruvannamalai, averaging 29.6°C.
For September in Tiruvannamalai, pack light, breathable clothing and sun protection, with typical highs of 36.4°C and lows of 22.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 74% — moderately humid.
Average wind speed in September is 2.1 m/s. The windiest September on record averaged 2.6 m/s (1983).
The wettest September on record was 2004 with 242 mm. On average, September sees 129 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 Tiruvannamalai 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.
