September is one of the cooler months of the year in Coimbatore, with average highs near 28.3°C and lows around 20.7°C (mean 24.5°C). It is a relatively wet time of year, averaging 113 mm of rainfall and 85% relative humidity across the period.
September is one of the cooler months of the year in Coimbatore. Across 45 years of records, the warmest September in Coimbatore was 2015 — when the month averaged 26°C — while the coldest was 1983 at 23.2°C. Typical September days reach 28.3°C with nights near 20.7°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Coimbatore, averaging 113 mm of rainfall. The wettest September on record was 2017 with 280 mm, while the driest were 1999, 2003 and 2016 at 24 mm.
Relative humidity in Coimbatore during September averages 85%. The most humid September was 1981 at 90%, and the least humid was 2015 at 79%.
September receives about 5.1 kWh/m²/day of solar energy in Coimbatore. The sunniest Septembers were 2002 and 2018 at 6 kWh/m²/day, and the cloudiest was 2020 at 4.1.
Average wind speed in Coimbatore during September is 2.3 m/s. The windiest September was 2005 at 2.9 m/s, while the calmest was 2018 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.2°C | 24.4°C | 24.5°C | 24.7°C | 24.7°C | +0.5°C |
| Avg High | 28.1°C | 28.2°C | 28.3°C | 28.7°C | 28.4°C | +0.3°C |
| Avg Low | 20.4°C | 20.5°C | 20.7°C | 20.8°C | 21.0°C | +0.6°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 28.3°C and nights around 20.7°C (mean 24.5°C, close to Coimbatore's yearly average) and higher rainfall. December and January 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 | 29.0°C | 25.2°C | 21.4°C | 31.7°C | 20.2°C | 96 mm | 85% | 2.4 m/s | 5.1 |
| 2024 | 28.9°C | 25.1°C | 21.3°C | 30.6°C | 20.1°C | 59 mm | 85% | 2.4 m/s | 5.3 |
| 2023 | 29.0°C | 25.1°C | 21.1°C | 31.3°C | 20.1°C | 163 mm | 83% | 2.6 m/s | 4.4 |
| 2022 | 27.7°C | 24.1°C | 20.5°C | 29.9°C | 19.2°C | 119 mm | 89% | 2 m/s | 5.2 |
| 2021 | 28.2°C | 24.6°C | 21.0°C | 30.6°C | 19.9°C | 160 mm | 86% | 2.3 m/s | 4.7 |
| 2020 | 27.3°C | 24.0°C | 20.8°C | 29.3°C | 19.0°C | 199 mm | 88% | 2.6 m/s | 4.1 |
| 2019 | 27.4°C | 24.2°C | 21.0°C | 29.2°C | 19.4°C | 222 mm | 89% | 2.1 m/s | 4.6 |
| 2018 | 29.3°C | 24.8°C | 20.4°C | 31.9°C | 18.9°C | 120 mm | 83% | 1.8 m/s | 6 |
| 2017 🌧️ | 27.5°C | 24.4°C | 21.3°C | 29.3°C | 19.8°C | 280 mm | 89% | 1.9 m/s | 4.9 |
| 2016 | 30.1°C | 25.2°C | 20.4°C | 32.2°C | 18.1°C | 24 mm | 79% | 2.7 m/s | 5 |
| 2015 🔥 | 30.6°C | 26.0°C | 21.4°C | 33.9°C | 19.6°C | 109 mm | 79% | 2.2 m/s | 5.4 |
| 2014 | 28.2°C | 24.6°C | 20.9°C | 30.3°C | 19.8°C | 132 mm | 86% | 2.2 m/s | 5.2 |
| 2013 | 27.9°C | 24.3°C | 20.7°C | 30.8°C | 19.1°C | 98 mm | 86% | 2.6 m/s | 4.8 |
| 2012 | 29.6°C | 25.1°C | 20.6°C | 32.1°C | 19.8°C | 67 mm | 80% | 2.7 m/s | 5.1 |
| 2011 | 28.3°C | 24.5°C | 20.6°C | 31.9°C | 19.0°C | 117 mm | 85% | 2.7 m/s | 4.8 |
| 2010 | 28.0°C | 24.2°C | 20.5°C | 30.4°C | 19.6°C | 110 mm | 85% | 2.1 m/s | 4.8 |
| 2009 | 28.1°C | 24.5°C | 20.9°C | 31.5°C | 19.5°C | 122 mm | 86% | 2.5 m/s | 4.6 |
| 2008 | 27.8°C | 24.0°C | 20.2°C | 31.1°C | 18.3°C | 114 mm | 87% | 2.3 m/s | 5.3 |
| 2007 | 26.6°C | 23.7°C | 20.8°C | 29.7°C | 18.8°C | 184 mm | 90% | 2.5 m/s | 4.2 |
| 2006 | 27.3°C | 24.0°C | 20.8°C | 30.1°C | 18.2°C | 186 mm | 88% | 2.5 m/s | 4.4 |
| 2005 | 27.9°C | 24.5°C | 21.0°C | 30.6°C | 19.7°C | 100 mm | 86% | 2.9 m/s | 4.6 |
| 2004 | 28.2°C | 24.4°C | 20.6°C | 31.2°C | 19.1°C | 167 mm | 84% | 1.9 m/s | 4.9 |
| 2003 | 30.1°C | 25.5°C | 20.8°C | 33.7°C | 19.4°C | 24 mm | 80% | 2.5 m/s | 5.8 |
| 2002 | 30.2°C | 25.4°C | 20.6°C | 33.1°C | 19.1°C | 45 mm | 80% | 2.4 m/s | 6 |
| 2001 | 28.7°C | 24.8°C | 20.8°C | 32.1°C | 19.5°C | 104 mm | 83% | 2.1 m/s | 5.2 |
| 2000 | 28.2°C | 24.6°C | 20.9°C | 30.7°C | 20.1°C | 80 mm | 85% | 2 m/s | 5 |
| 1999 | 29.9°C | 25.3°C | 20.8°C | 33.0°C | 19.0°C | 24 mm | 79% | 2.4 m/s | 5.5 |
| 1998 | 27.0°C | 23.9°C | 20.8°C | 29.0°C | 19.4°C | 181 mm | 89% | 2.7 m/s | 4.5 |
| 1997 | 27.8°C | 24.2°C | 20.6°C | 29.1°C | 19.4°C | 91 mm | 87% | 2.1 m/s | 5.4 |
| 1996 | 26.7°C | 23.5°C | 20.3°C | 28.1°C | 18.4°C | 130 mm | 89% | 2.6 m/s | 4.7 |
| 1995 | 28.2°C | 24.5°C | 20.8°C | 31.1°C | 19.6°C | 79 mm | 85% | 2.6 m/s | 5.1 |
| 1994 | 28.4°C | 24.2°C | 20.1°C | 31.8°C | 17.3°C | 70 mm | 84% | 2.3 m/s | 5.5 |
| 1993 | 28.9°C | 24.6°C | 20.3°C | 31.0°C | 19.1°C | 30 mm | 82% | 2.3 m/s | 5.5 |
| 1992 | 27.2°C | 23.8°C | 20.4°C | 29.4°C | 19.3°C | 144 mm | 87% | 2.2 m/s | 4.8 |
| 1991 | 28.8°C | 24.6°C | 20.5°C | 31.2°C | 18.7°C | 37 mm | 83% | 2 m/s | 5.5 |
| 1990 | 29.4°C | 24.9°C | 20.5°C | 32.1°C | 19.3°C | 40 mm | 80% | 2.3 m/s | 5.6 |
| 1989 | 28.2°C | 24.3°C | 20.5°C | 30.2°C | 18.5°C | 114 mm | 84% | 2.3 m/s | 5.2 |
| 1988 | 26.7°C | 23.7°C | 20.8°C | 28.0°C | 19.9°C | 175 mm | 90% | 2.6 m/s | 4.8 |
| 1987 | 29.9°C | 25.4°C | 21.0°C | 32.7°C | 18.9°C | 35 mm | 80% | 2.2 m/s | 5.5 |
| 1986 | 29.0°C | 24.8°C | 20.6°C | 31.1°C | 19.3°C | 112 mm | 82% | 2.5 m/s | 5.1 |
| 1985 | 28.5°C | 24.3°C | 20.1°C | 31.6°C | 18.4°C | 86 mm | 82% | 2.2 m/s | 5.3 |
| 1984 | 29.3°C | 24.7°C | 20.2°C | 32.8°C | 18.6°C | 99 mm | 80% | 2.1 m/s | 5.3 |
| 1983 ❄️ | 26.5°C | 23.2°C | 19.9°C | 28.5°C | 17.8°C | 171 mm | 88% | 2.8 m/s | — |
| 1982 | 28.3°C | 24.1°C | 19.8°C | 29.9°C | 18.9°C | 40 mm | 84% | 2.3 m/s | — |
| 1981 | 26.5°C | 23.5°C | 20.6°C | 28.3°C | 19.7°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 28.3°C with lows near 20.7°C (mean 24.5°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 27.8°C to 28.6°C and overnight lows from 20.1°C to 21.1°C over the same span.
September is one of the cooler months of the year in Coimbatore and a relatively wet time of year, so plan for around 28.3°C daytime highs and 20.7°C at night.
Not quite — September is the 7th coolest month in Coimbatore, averaging 24.5°C.
For September in Coimbatore, pack light layers you can adjust through the day, with typical highs of 28.3°C and lows of 20.7°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.
