September is close to Coimbatore's year-round average, with average highs near 30.8°C and lows around 19.2°C (mean 25°C). It is a relatively wet time of year, averaging 113 mm of rainfall and 85% relative humidity across the period.
September is close to Coimbatore's year-round average. Across 45 years of records, the warmest September in Coimbatore was 2015 — when the month averaged 26.8°C — while the coldest was 1983 at 23.2°C. Typical September days reach 30.8°C with nights near 19.2°C. The long-term trend is warming, 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 | 24.6°C | 24.7°C | 25.3°C | 25.3°C | 25.1°C | +0.5°C |
| Avg High | 30.3°C | 30.6°C | 31.4°C | 31.2°C | 30.6°C | +0.3°C |
| Avg Low | 18.9°C | 19.0°C | 19.2°C | 19.3°C | 19.7°C | +0.8°C |
| Avg Rain | 116 mm | 83 mm | 113 mm | 128 mm | 133 mm | +17 mm |
September temperatures in Coimbatore have risen by about 0.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 17.3°C (1994) to a record high of 33.9°C (2015).
Rainfall in September is a relatively wet time of year, averaging 113 mm, with a wettest year of 280 mm.
A good time to visit Coimbatore
September is a good time to visit Coimbatore, with days averaging 30.8°C and nights around 19.2°C (mean 25°C, close to Coimbatore's yearly average) and higher rainfall. December and January are marginally more temperate, but September still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 31.7°C | 20.2°C | 25.9°C | 96 mm | 85% | 2.4 m/s | 5.1 |
| 2024 | 30.6°C | 20.1°C | 25.4°C | 59 mm | 85% | 2.4 m/s | 5.3 |
| 2023 | 31.3°C | 20.1°C | 25.7°C | 163 mm | 83% | 2.6 m/s | 4.4 |
| 2022 | 29.9°C | 19.2°C | 24.5°C | 119 mm | 89% | 2 m/s | 5.2 |
| 2021 | 30.6°C | 19.9°C | 25.2°C | 160 mm | 86% | 2.3 m/s | 4.7 |
| 2020 | 29.3°C | 19.0°C | 24.1°C | 199 mm | 88% | 2.6 m/s | 4.1 |
| 2019 | 29.2°C | 19.4°C | 24.3°C | 222 mm | 89% | 2.1 m/s | 4.6 |
| 2018 | 31.9°C | 18.9°C | 25.4°C | 120 mm | 83% | 1.8 m/s | 6 |
| 2017 🌧️ | 29.3°C | 19.8°C | 24.5°C | 280 mm | 89% | 1.9 m/s | 4.9 |
| 2016 | 32.2°C | 18.1°C | 25.1°C | 24 mm | 79% | 2.7 m/s | 5 |
| 2015 🔥 | 33.9°C | 19.6°C | 26.8°C | 109 mm | 79% | 2.2 m/s | 5.4 |
| 2014 | 30.3°C | 19.8°C | 25.0°C | 132 mm | 86% | 2.2 m/s | 5.2 |
| 2013 | 30.8°C | 19.1°C | 25.0°C | 98 mm | 86% | 2.6 m/s | 4.8 |
| 2012 | 32.1°C | 19.8°C | 26.0°C | 67 mm | 80% | 2.7 m/s | 5.1 |
| 2011 | 31.9°C | 19.0°C | 25.4°C | 117 mm | 85% | 2.7 m/s | 4.8 |
| 2010 | 30.4°C | 19.6°C | 25.0°C | 110 mm | 85% | 2.1 m/s | 4.8 |
| 2009 | 31.5°C | 19.5°C | 25.5°C | 122 mm | 86% | 2.5 m/s | 4.6 |
| 2008 | 31.1°C | 18.3°C | 24.7°C | 114 mm | 87% | 2.3 m/s | 5.3 |
| 2007 | 29.7°C | 18.8°C | 24.3°C | 184 mm | 90% | 2.5 m/s | 4.2 |
| 2006 | 30.1°C | 18.2°C | 24.1°C | 186 mm | 88% | 2.5 m/s | 4.4 |
| 2005 | 30.6°C | 19.7°C | 25.2°C | 100 mm | 86% | 2.9 m/s | 4.6 |
| 2004 | 31.2°C | 19.1°C | 25.2°C | 167 mm | 84% | 1.9 m/s | 4.9 |
| 2003 | 33.7°C | 19.4°C | 26.5°C | 24 mm | 80% | 2.5 m/s | 5.8 |
| 2002 | 33.1°C | 19.1°C | 26.1°C | 45 mm | 80% | 2.4 m/s | 6 |
| 2001 | 32.1°C | 19.5°C | 25.8°C | 104 mm | 83% | 2.1 m/s | 5.2 |
| 2000 | 30.7°C | 20.1°C | 25.4°C | 80 mm | 85% | 2 m/s | 5 |
| 1999 | 33.0°C | 19.0°C | 26.0°C | 24 mm | 79% | 2.4 m/s | 5.5 |
| 1998 | 29.0°C | 19.4°C | 24.2°C | 181 mm | 89% | 2.7 m/s | 4.5 |
| 1997 | 29.1°C | 19.4°C | 24.2°C | 91 mm | 87% | 2.1 m/s | 5.4 |
| 1996 | 28.1°C | 18.4°C | 23.3°C | 130 mm | 89% | 2.6 m/s | 4.7 |
| 1995 | 31.1°C | 19.6°C | 25.3°C | 79 mm | 85% | 2.6 m/s | 5.1 |
| 1994 | 31.8°C | 17.3°C | 24.5°C | 70 mm | 84% | 2.3 m/s | 5.5 |
| 1993 | 31.0°C | 19.1°C | 25.0°C | 30 mm | 82% | 2.3 m/s | 5.5 |
| 1992 | 29.4°C | 19.3°C | 24.3°C | 144 mm | 87% | 2.2 m/s | 4.8 |
| 1991 | 31.2°C | 18.7°C | 24.9°C | 37 mm | 83% | 2 m/s | 5.5 |
| 1990 | 32.1°C | 19.3°C | 25.7°C | 40 mm | 80% | 2.3 m/s | 5.6 |
| 1989 | 30.2°C | 18.5°C | 24.3°C | 114 mm | 84% | 2.3 m/s | 5.2 |
| 1988 | 28.0°C | 19.9°C | 23.9°C | 175 mm | 90% | 2.6 m/s | 4.8 |
| 1987 | 32.7°C | 18.9°C | 25.8°C | 35 mm | 80% | 2.2 m/s | 5.5 |
| 1986 | 31.1°C | 19.3°C | 25.2°C | 112 mm | 82% | 2.5 m/s | 5.1 |
| 1985 | 31.6°C | 18.4°C | 25.0°C | 86 mm | 82% | 2.2 m/s | 5.3 |
| 1984 | 32.8°C | 18.6°C | 25.7°C | 99 mm | 80% | 2.1 m/s | 5.3 |
| 1983 ❄️ | 28.5°C | 17.8°C | 23.2°C | 171 mm | 88% | 2.8 m/s | — |
| 1982 | 29.9°C | 18.9°C | 24.4°C | 40 mm | 84% | 2.3 m/s | — |
| 1981 | 28.3°C | 19.7°C | 24.0°C | 207 mm | 90% | 2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 30.8°C with lows near 19.2°C (mean 25°C), based on 45 years of NASA POWER data.
September averages 113 mm of rainfall in Coimbatore, a relatively wet time of year. The wettest on record was 280 mm in 2017.
The hottest September reached 33.9°C in 2015. The coldest dipped to 17.3°C in 1994.
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 30.2°C to 30.8°C and overnight lows from 18.7°C to 19.9°C over the same span.
September is close to Coimbatore's year-round average and a relatively wet time of year, so plan for around 30.8°C daytime highs and 19.2°C at night.
Not quite — September is the 7th coolest month in Coimbatore, averaging 25°C.
For September in Coimbatore, pack light, breathable clothing and sun protection, with typical highs of 30.8°C and lows of 19.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 85% — quite humid.
Average wind speed in September is 2.3 m/s. The windiest September on record averaged 2.9 m/s (2005).
The wettest September on record was 2017 with 280 mm. On average, September sees 113 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 Coimbatore 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.
