September is one of the warmer months of the year in Namakkal, with average highs near 36.7°C and lows around 21.5°C (mean 29.1°C). It is a relatively wet time of year, averaging 111 mm of rainfall and 71% relative humidity across the period.
September is one of the warmer months of the year in Namakkal. Across 45 years of records, the warmest Septembers in Namakkal were 2002 and 2015 — when the month averaged 30.6°C — while the coldest was 1983 at 26°C. Typical September days reach 36.7°C with nights near 21.5°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 | 28.6°C | 29.2°C | 29.4°C | 29.3°C | 28.9°C | +0.3°C |
| Avg High | 36.2°C | 37.0°C | 37.1°C | 36.9°C | 36.1°C | -0.1°C |
| Avg Low | 20.9°C | 21.4°C | 21.8°C | 21.6°C | 21.7°C | +0.8°C |
| Avg Rain | 146 mm | 107 mm | 93 mm | 109 mm | 97 mm | -49 mm |
September temperatures in Namakkal have risen by about 1.2°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 19.1°C (1983) to a record high of 39.2°C (1982).
Rainfall in September is a relatively wet time of year, averaging 111 mm, with a wettest year of 275 mm.
A quieter season to visit Namakkal
If your dates are flexible, the more temperate months of January and December tend to be the most comfortable for visiting Namakkal. That said, September — with days averaging 36.7°C and nights around 21.5°C (mean 29.1°C) and higher rainfall (111 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 | 38.2°C | 22.7°C | 30.5°C | 108 mm | 69% | 2.6 m/s | 5.3 |
| 2024 | 38.0°C | 22.5°C | 30.2°C | 15 mm | 69% | 3.3 m/s | 5.8 |
| 2023 | 36.1°C | 21.5°C | 28.8°C | 107 mm | 71% | 2.9 m/s | 5.6 |
| 2022 | 35.0°C | 21.2°C | 28.1°C | 81 mm | 76% | 2.3 m/s | 5.4 |
| 2021 | 35.3°C | 21.1°C | 28.2°C | 148 mm | 75% | 2.6 m/s | 5.3 |
| 2020 | 34.2°C | 21.4°C | 27.8°C | 126 mm | 77% | 2.5 m/s | 4.8 |
| 2019 | 35.9°C | 22.0°C | 28.9°C | 161 mm | 76% | 2.5 m/s | 5.1 |
| 2018 | 38.9°C | 21.5°C | 30.2°C | 125 mm | 66% | 2.2 m/s | 5.6 |
| 2017 | 34.1°C | 20.9°C | 27.5°C | 185 mm | 81% | 1.9 m/s | 5.2 |
| 2016 | 38.4°C | 21.8°C | 30.1°C | 13 mm | 60% | 3.5 m/s | 5.4 |
| 2015 | 38.8°C | 22.4°C | 30.6°C | 87 mm | 65% | 2.4 m/s | 5.6 |
| 2014 | 38.1°C | 22.3°C | 30.2°C | 73 mm | 67% | 2.8 m/s | 5.5 |
| 2013 | 36.1°C | 20.9°C | 28.5°C | 123 mm | 74% | 2.6 m/s | 5.6 |
| 2012 | 36.9°C | 21.5°C | 29.2°C | 100 mm | 68% | 2.8 m/s | 5.6 |
| 2011 | 36.9°C | 21.1°C | 29.0°C | 133 mm | 69% | 3.1 m/s | 5.9 |
| 2010 | 35.4°C | 21.3°C | 28.4°C | 90 mm | 72% | 2.5 m/s | 5.1 |
| 2009 | 38.3°C | 22.0°C | 30.1°C | 67 mm | 68% | 3.1 m/s | 5.7 |
| 2008 | 36.5°C | 21.0°C | 28.7°C | 32 mm | 73% | 2.4 m/s | 5.6 |
| 2007 | 36.3°C | 21.4°C | 28.8°C | 44 mm | 72% | 2.9 m/s | 5.3 |
| 2006 | 35.6°C | 21.4°C | 28.5°C | 77 mm | 75% | 2.6 m/s | 5.4 |
| 2005 | 36.9°C | 22.1°C | 29.5°C | 86 mm | 71% | 3.1 m/s | 5.5 |
| 2004 | 37.3°C | 21.3°C | 29.3°C | 246 mm | 77% | 1.9 m/s | 4.9 |
| 2003 | 37.6°C | 22.1°C | 29.9°C | 89 mm | 67% | 2.8 m/s | 6.1 |
| 2002 🔥 | 39.2°C | 22.0°C | 30.6°C | 44 mm | 60% | 3 m/s | 6.1 |
| 2001 | 37.4°C | 22.3°C | 29.8°C | 110 mm | 73% | 2.2 m/s | 5.5 |
| 2000 | 36.3°C | 22.1°C | 29.2°C | 136 mm | 74% | 2.2 m/s | 5.4 |
| 1999 | 38.6°C | 22.4°C | 30.5°C | 45 mm | 58% | 2.9 m/s | 5.9 |
| 1998 | 36.0°C | 21.3°C | 28.7°C | 120 mm | 76% | 2.7 m/s | 5.3 |
| 1997 | 37.8°C | 21.6°C | 29.7°C | 93 mm | 71% | 2.4 m/s | 5.4 |
| 1996 | 34.2°C | 21.1°C | 27.6°C | 117 mm | 77% | 2.7 m/s | 4.8 |
| 1995 | 36.8°C | 21.3°C | 29.0°C | 65 mm | 69% | 3.1 m/s | 5.3 |
| 1994 | 38.5°C | 20.1°C | 29.3°C | 92 mm | 64% | 2.9 m/s | 5.6 |
| 1993 | 37.0°C | 21.5°C | 29.3°C | 54 mm | 67% | 2.5 m/s | 5.3 |
| 1992 | 37.0°C | 21.8°C | 29.4°C | 186 mm | 73% | 2.6 m/s | 5.1 |
| 1991 | 35.9°C | 21.1°C | 28.5°C | 167 mm | 72% | 2.2 m/s | 5.6 |
| 1990 | 38.0°C | 21.6°C | 29.8°C | 136 mm | 67% | 2.6 m/s | 5.2 |
| 1989 | 37.0°C | 21.4°C | 29.2°C | 102 mm | 69% | 2.5 m/s | 5 |
| 1988 | 34.7°C | 20.4°C | 27.6°C | 172 mm | 79% | 2.5 m/s | 5.2 |
| 1987 | 38.7°C | 22.2°C | 30.5°C | 87 mm | 68% | 2.2 m/s | 5.5 |
| 1986 | 37.1°C | 21.9°C | 29.5°C | 139 mm | 69% | 2.6 m/s | 5.7 |
| 1985 | 36.9°C | 20.9°C | 28.9°C | 145 mm | 70% | 2.4 m/s | 5.3 |
| 1984 | 36.4°C | 20.3°C | 28.3°C | 117 mm | 69% | 2.3 m/s | 5.4 |
| 1983 ❄️ 🌧️ | 32.8°C | 19.1°C | 26.0°C | 275 mm | 81% | 2.5 m/s | — |
| 1982 | 39.2°C | 20.9°C | 30.1°C | 60 mm | 63% | 3 m/s | — |
| 1981 | 33.0°C | 20.9°C | 26.9°C | 216 mm | 82% | 2.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 36.7°C with lows near 21.5°C (mean 29.1°C), based on 45 years of NASA POWER data.
September averages 111 mm of rainfall in Namakkal, a relatively wet time of year. The wettest on record was 275 mm in 1983.
The hottest September reached 39.2°C in 1982. The coldest dipped to 19.1°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.2°C. Daytime highs moved from 35.7°C to 36.5°C and overnight lows from 20.4°C to 21.8°C over the same span.
September is one of the warmer months of the year in Namakkal and a relatively wet time of year, so plan for around 36.7°C daytime highs and 21.5°C at night.
Not quite — September is the 6th coolest month in Namakkal, averaging 29.1°C.
For September in Namakkal, pack light, breathable clothing and sun protection, with typical highs of 36.7°C and lows of 21.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 71% — moderately humid.
Average wind speed in September is 2.6 m/s. The windiest September on record averaged 3.5 m/s (2016).
The wettest September on record was 1983 with 275 mm. On average, September sees 111 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 Namakkal 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.
