September is close to Tiruvannamalai's year-round average, with average highs near 33.1°C and lows around 24.3°C (mean 28.7°C). It is a relatively wet time of year, averaging 129 mm of rainfall and 74% relative humidity across the period.
September is close to Tiruvannamalai's year-round average. Across 45 years of records, the warmest September in Tiruvannamalai was 2002 — when the month averaged 30.2°C — while the coldest was 1981 at 27°C. Typical September days reach 33.1°C with nights near 24.3°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Tiruvannamalai, averaging 129 mm of rainfall. The wettest September on record was 2004 with 242 mm, while the driest was 2024 at 52 mm.
Relative humidity in Tiruvannamalai during September averages 74%. The most humid September was 1981 at 83%, and the least humid was 1994 at 64%.
September receives about 5.4 kWh/m²/day of solar energy in Tiruvannamalai. The sunniest September was 2002 at 6 kWh/m²/day, and the cloudiest was 2020 at 4.6.
Average wind speed in Tiruvannamalai during September is 2.1 m/s. The windiest Septembers were 1983 and 2006 at 2.6 m/s, while the calmest were 2017, 2018 and 2022, among others at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.3°C | 28.8°C | 28.9°C | 28.8°C | 28.6°C | +0.3°C |
| Avg High | 32.7°C | 33.2°C | 33.4°C | 33.1°C | 32.9°C | +0.2°C |
| Avg Low | 23.9°C | 24.3°C | 24.4°C | 24.3°C | 24.4°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 0.8°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.
A good time to visit Tiruvannamalai
September is a good time to visit Tiruvannamalai, with days averaging 33.1°C and nights around 24.3°C (mean 28.7°C, close to Tiruvannamalai's yearly average) and higher rainfall. January and February are marginally more temperate, but September still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 33.2°C | 28.9°C | 24.7°C | 35.8°C | 23.4°C | 166 mm | 76% | 1.9 m/s | 5.2 |
| 2024 | 34.7°C | 29.8°C | 24.9°C | 37.7°C | 23.4°C | 52 mm | 70% | 2.1 m/s | 5.4 |
| 2023 | 33.3°C | 28.8°C | 24.4°C | 36.6°C | 23.4°C | 158 mm | 76% | 2.4 m/s | 5.6 |
| 2022 | 32.3°C | 28.2°C | 24.2°C | 34.6°C | 22.5°C | 92 mm | 77% | 1.8 m/s | 5.2 |
| 2021 | 32.1°C | 28.1°C | 24.1°C | 34.4°C | 22.4°C | 154 mm | 79% | 2.1 m/s | 5.2 |
| 2020 | 31.7°C | 27.8°C | 23.9°C | 34.1°C | 21.9°C | 181 mm | 80% | 2.2 m/s | 4.6 |
| 2019 | 31.7°C | 28.0°C | 24.2°C | 35.6°C | 23.3°C | 200 mm | 80% | 2.2 m/s | 5 |
| 2018 | 34.6°C | 29.7°C | 24.7°C | 38.6°C | 23.0°C | 101 mm | 70% | 1.8 m/s | 5.7 |
| 2017 | 31.6°C | 28.0°C | 24.3°C | 34.4°C | 22.6°C | 143 mm | 81% | 1.8 m/s | 5.1 |
| 2016 | 34.5°C | 29.4°C | 24.4°C | 37.8°C | 23.4°C | 68 mm | 68% | 1.8 m/s | 5.2 |
| 2015 | 34.1°C | 29.5°C | 24.8°C | 37.9°C | 23.3°C | 90 mm | 71% | 2 m/s | 5.6 |
| 2014 | 33.8°C | 29.2°C | 24.5°C | 37.1°C | 22.9°C | 130 mm | 73% | 1.9 m/s | 5.6 |
| 2013 | 31.6°C | 27.6°C | 23.7°C | 34.0°C | 21.9°C | 183 mm | 80% | 2.1 m/s | 5.4 |
| 2012 | 33.6°C | 29.0°C | 24.4°C | 37.5°C | 22.8°C | 110 mm | 71% | 1.9 m/s | 5.5 |
| 2011 | 33.8°C | 29.1°C | 24.3°C | 35.8°C | 22.7°C | 154 mm | 72% | 2 m/s | 5.9 |
| 2010 | 32.1°C | 28.0°C | 23.9°C | 34.3°C | 22.8°C | 126 mm | 78% | 1.9 m/s | 5.1 |
| 2009 | 34.2°C | 29.5°C | 24.7°C | 37.6°C | 23.2°C | 142 mm | 72% | 2.2 m/s | 5.7 |
| 2008 | 33.2°C | 28.5°C | 23.9°C | 36.5°C | 22.2°C | 57 mm | 73% | 2.1 m/s | 5.6 |
| 2007 | 31.9°C | 27.8°C | 23.8°C | 34.1°C | 22.1°C | 112 mm | 78% | 2.2 m/s | 5.5 |
| 2006 | 33.6°C | 29.0°C | 24.4°C | 36.1°C | 23.3°C | 77 mm | 72% | 2.6 m/s | 5.3 |
| 2005 | 33.3°C | 28.9°C | 24.5°C | 37.2°C | 23.0°C | 127 mm | 74% | 2.1 m/s | 5.4 |
| 2004 🌧️ | 31.4°C | 27.8°C | 24.1°C | 35.6°C | 22.7°C | 242 mm | 79% | 1.9 m/s | 4.9 |
| 2003 | 34.8°C | 29.8°C | 24.7°C | 38.4°C | 23.7°C | 83 mm | 68% | 2.2 m/s | 5.9 |
| 2002 🔥 | 35.5°C | 30.2°C | 25.0°C | 39.4°C | 23.4°C | 95 mm | 65% | 2.2 m/s | 6 |
| 2001 | 32.7°C | 28.6°C | 24.5°C | 36.5°C | 23.2°C | 138 mm | 75% | 1.9 m/s | 5.6 |
| 2000 | 33.0°C | 28.8°C | 24.5°C | 36.9°C | 23.7°C | 125 mm | 74% | 1.9 m/s | 5.6 |
| 1999 | 35.0°C | 29.9°C | 24.7°C | 37.6°C | 22.9°C | 98 mm | 67% | 2.1 m/s | 5.6 |
| 1998 | 32.4°C | 28.3°C | 24.2°C | 35.1°C | 23.3°C | 146 mm | 77% | 2.3 m/s | 5.3 |
| 1997 | 33.2°C | 28.8°C | 24.5°C | 37.2°C | 23.4°C | 104 mm | 73% | 2.1 m/s | 5.2 |
| 1996 | 30.7°C | 27.2°C | 23.6°C | 33.8°C | 22.7°C | 173 mm | 82% | 2.1 m/s | 5.2 |
| 1995 | 33.4°C | 28.8°C | 24.3°C | 35.8°C | 23.2°C | 120 mm | 73% | 2.2 m/s | 5.1 |
| 1994 | 35.2°C | 29.8°C | 24.4°C | 38.9°C | 21.0°C | 54 mm | 64% | 2.4 m/s | 5.8 |
| 1993 | 32.8°C | 28.4°C | 24.0°C | 36.1°C | 22.8°C | 93 mm | 73% | 2 m/s | 5.3 |
| 1992 | 33.5°C | 28.9°C | 24.3°C | 37.1°C | 23.4°C | 161 mm | 70% | 1.9 m/s | 5.1 |
| 1991 | 33.4°C | 29.0°C | 24.5°C | 35.9°C | 23.1°C | 117 mm | 72% | 1.9 m/s | 5.3 |
| 1990 | 32.8°C | 28.5°C | 24.2°C | 37.8°C | 22.5°C | 173 mm | 74% | 1.9 m/s | 5.1 |
| 1989 | 33.1°C | 28.6°C | 24.2°C | 37.6°C | 22.5°C | 131 mm | 71% | 2 m/s | 5 |
| 1988 | 31.7°C | 27.7°C | 23.8°C | 33.9°C | 21.6°C | 153 mm | 79% | 2.3 m/s | 5.2 |
| 1987 | 34.2°C | 29.5°C | 24.9°C | 38.3°C | 23.7°C | 88 mm | 70% | 1.9 m/s | 5.4 |
| 1986 | 33.4°C | 28.8°C | 24.1°C | 37.6°C | 23.1°C | 118 mm | 71% | 1.8 m/s | 5.7 |
| 1985 | 32.2°C | 27.9°C | 23.5°C | 36.6°C | 22.0°C | 148 mm | 74% | 1.9 m/s | 5.5 |
| 1984 | 33.4°C | 28.6°C | 23.8°C | 37.9°C | 21.9°C | 156 mm | 70% | 2.1 m/s | 5.5 |
| 1983 | 31.5°C | 27.3°C | 23.1°C | 34.3°C | 20.9°C | 188 mm | 79% | 2.6 m/s | — |
| 1982 | 34.1°C | 29.2°C | 24.3°C | 38.4°C | 22.9°C | 103 mm | 66% | 2 m/s | — |
| 1981 ❄️ | 30.4°C | 27.0°C | 23.6°C | 33.4°C | 22.4°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 33.1°C with lows near 24.3°C (mean 28.7°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 0.8°C. Daytime highs moved from 32.3°C to 33.1°C and overnight lows from 23.7°C to 24.5°C over the same span.
September is close to Tiruvannamalai's year-round average and a relatively wet time of year, so plan for around 33.1°C daytime highs and 24.3°C at night.
Not quite — September is the 6th coolest month in Tiruvannamalai, averaging 28.7°C.
For September in Tiruvannamalai, pack light, breathable clothing and sun protection, with typical highs of 33.1°C and lows of 24.3°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.
