September is one of the cooler months of the year in Ernakulam, with average highs near 27.8°C and lows around 24.7°C (mean 26.3°C). It is a relatively wet time of year, averaging 261 mm of rainfall and 88% relative humidity across the period.
September is one of the cooler months of the year in Ernakulam. Across 45 years of records, the warmest September in Ernakulam was 2024 — when the month averaged 27.3°C — while the coldest were 1983 and 1996 at 25.5°C. Typical September days reach 27.8°C with nights near 24.7°C. The long-term trend is warming, about 0.2°C per decade.
September is a relatively wet time of year in Ernakulam, averaging 261 mm of rainfall. The wettest September on record was 1988 with 634 mm, while the driest was 1991 at 40 mm.
Relative humidity in Ernakulam during September averages 88%. The most humid Septembers were 1981, 1996 and 2005 at 90%, and the least humid was 2002 at 85%.
September receives about 5.2 kWh/m²/day of solar energy in Ernakulam. The sunniest September was 2002 at 6.2 kWh/m²/day, and the cloudiest were 2020 and 2023 at 4.3.
Average wind speed in Ernakulam during September is 2.9 m/s. The windiest September was 1998 at 3.5 m/s, while the calmest was 2010 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.9°C | 26.1°C | 26.3°C | 26.5°C | 26.8°C | +0.9°C |
| Avg High | 27.4°C | 27.7°C | 27.8°C | 28.1°C | 28.3°C | +0.9°C |
| Avg Low | 24.3°C | 24.5°C | 24.7°C | 24.9°C | 25.3°C | +1°C |
| Avg Rain | 243 mm | 220 mm | 299 mm | 250 mm | 307 mm | +64 mm |
September temperatures in Ernakulam have risen by about 1.1°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 22.8°C (2016) to a record high of 31.1°C (2024).
Rainfall in September is a relatively wet time of year, averaging 261 mm, with a wettest year of 634 mm.
A good time to visit Ernakulam
September is a good time to visit Ernakulam, with days averaging 27.8°C and nights around 24.7°C (mean 26.3°C, cooler than Ernakulam's yearly average) and higher rainfall. January and December 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 | 28.5°C | 27.1°C | 25.7°C | 29.5°C | 25.1°C | 217 mm | 89% | 3.1 m/s | 5.1 |
| 2024 🔥 | 28.9°C | 27.3°C | 25.7°C | 31.1°C | 25.2°C | 161 mm | 88% | 2.9 m/s | 5.4 |
| 2023 | 28.3°C | 26.8°C | 25.3°C | 29.6°C | 24.5°C | 473 mm | 86% | 2.4 m/s | 4.3 |
| 2022 | 27.8°C | 26.2°C | 24.6°C | 28.8°C | 24.0°C | 185 mm | 88% | 2.6 m/s | 5.6 |
| 2021 | 28.1°C | 26.7°C | 25.2°C | 29.3°C | 24.4°C | 301 mm | 88% | 2.8 m/s | 4.9 |
| 2020 | 27.9°C | 26.5°C | 25.1°C | 29.7°C | 24.2°C | 503 mm | 88% | 2.8 m/s | 4.3 |
| 2019 | 28.3°C | 26.8°C | 25.4°C | 29.6°C | 24.5°C | 430 mm | 87% | 2.4 m/s | 4.9 |
| 2018 | 28.5°C | 26.5°C | 24.6°C | 29.8°C | 23.4°C | 100 mm | 85% | 2.7 m/s | 6.1 |
| 2017 | 28.1°C | 26.6°C | 25.2°C | 30.3°C | 24.5°C | 386 mm | 88% | 2.9 m/s | 5.1 |
| 2016 | 27.9°C | 26.1°C | 24.3°C | 28.4°C | 22.8°C | 61 mm | 88% | 3.1 m/s | 5.5 |
| 2015 | 28.6°C | 27.0°C | 25.4°C | 29.9°C | 24.5°C | 264 mm | 86% | 2.4 m/s | 5.4 |
| 2014 | 28.2°C | 26.6°C | 25.1°C | 30.6°C | 24.3°C | 229 mm | 88% | 2.9 m/s | 5.3 |
| 2013 | 27.8°C | 26.2°C | 24.6°C | 29.3°C | 23.6°C | 201 mm | 87% | 3 m/s | 4.9 |
| 2012 | 28.1°C | 26.5°C | 24.9°C | 29.2°C | 24.2°C | 176 mm | 87% | 2.7 m/s | 5.4 |
| 2011 | 27.8°C | 26.2°C | 24.7°C | 29.0°C | 23.9°C | 316 mm | 87% | 2.8 m/s | 4.9 |
| 2010 | 28.0°C | 26.3°C | 24.6°C | 30.2°C | 23.6°C | 340 mm | 88% | 2.3 m/s | 5 |
| 2009 | 27.9°C | 26.4°C | 24.9°C | 29.0°C | 23.8°C | 320 mm | 88% | 2.9 m/s | 4.9 |
| 2008 | 28.1°C | 26.4°C | 24.8°C | 29.1°C | 23.5°C | 375 mm | 86% | 2.7 m/s | 5.5 |
| 2007 | 27.4°C | 26.1°C | 24.7°C | 29.1°C | 24.0°C | 593 mm | 89% | 3 m/s | 4.5 |
| 2006 | 27.4°C | 26.1°C | 24.8°C | 28.6°C | 23.7°C | 496 mm | 89% | 3 m/s | 4.7 |
| 2005 | 27.5°C | 26.1°C | 24.8°C | 28.7°C | 24.2°C | 364 mm | 90% | 3.1 m/s | 4.9 |
| 2004 | 27.5°C | 25.9°C | 24.3°C | 28.7°C | 23.2°C | 238 mm | 88% | 2.5 m/s | 5.1 |
| 2003 | 28.5°C | 26.8°C | 25.0°C | 29.6°C | 24.4°C | 59 mm | 86% | 2.9 m/s | 5.9 |
| 2002 | 28.4°C | 26.6°C | 24.7°C | 30.3°C | 24.0°C | 147 mm | 85% | 2.8 m/s | 6.2 |
| 2001 | 27.8°C | 26.2°C | 24.5°C | 29.1°C | 24.0°C | 274 mm | 87% | 3 m/s | 5.3 |
| 2000 | 27.7°C | 26.2°C | 24.6°C | 28.8°C | 23.9°C | 124 mm | 89% | 2.7 m/s | 5.1 |
| 1999 | 28.1°C | 26.4°C | 24.6°C | 28.9°C | 24.1°C | 44 mm | 86% | 2.7 m/s | 5.7 |
| 1998 | 27.3°C | 26.1°C | 24.9°C | 28.7°C | 23.9°C | 554 mm | 89% | 3.5 m/s | 4.5 |
| 1997 | 27.7°C | 26.2°C | 24.6°C | 28.8°C | 23.9°C | 409 mm | 88% | 2.6 m/s | 5.2 |
| 1996 | 26.9°C | 25.5°C | 24.2°C | 27.9°C | 23.6°C | 326 mm | 90% | 3 m/s | 4.4 |
| 1995 | 27.7°C | 26.2°C | 24.7°C | 28.8°C | 23.9°C | 231 mm | 89% | 3.1 m/s | 5.2 |
| 1994 | 27.6°C | 25.9°C | 24.3°C | 29.1°C | 23.2°C | 191 mm | 87% | 3 m/s | 5.4 |
| 1993 | 27.9°C | 26.1°C | 24.3°C | 29.3°C | 23.1°C | 59 mm | 86% | 2.7 m/s | 5.2 |
| 1992 | 27.1°C | 25.7°C | 24.3°C | 28.2°C | 23.3°C | 294 mm | 89% | 3.2 m/s | 4.9 |
| 1991 | 28.3°C | 26.5°C | 24.7°C | 29.2°C | 24.2°C | 40 mm | 86% | 2.9 m/s | 5.6 |
| 1990 | 28.1°C | 26.2°C | 24.4°C | 29.5°C | 23.6°C | 56 mm | 85% | 2.9 m/s | 5.3 |
| 1989 | 27.4°C | 25.9°C | 24.4°C | 28.2°C | 23.6°C | 232 mm | 87% | 3.1 m/s | 4.7 |
| 1988 🌧️ | 27.3°C | 25.9°C | 24.6°C | 28.3°C | 23.4°C | 634 mm | 89% | 3.3 m/s | 4.8 |
| 1987 | 28.0°C | 26.4°C | 24.8°C | 29.0°C | 23.7°C | 107 mm | 87% | 3 m/s | 5.4 |
| 1986 | 27.5°C | 25.9°C | 24.2°C | 28.3°C | 23.6°C | 182 mm | 87% | 3 m/s | 4.9 |
| 1985 | 27.4°C | 25.7°C | 23.9°C | 28.8°C | 22.9°C | 101 mm | 86% | 2.8 m/s | 5.3 |
| 1984 | 27.5°C | 25.6°C | 23.8°C | 28.9°C | 23.2°C | 109 mm | 87% | 2.8 m/s | 5.6 |
| 1983 ❄️ | 26.9°C | 25.5°C | 24.1°C | 28.5°C | 23.0°C | 302 mm | 88% | 3 m/s | — |
| 1982 | 27.9°C | 26.1°C | 24.3°C | 28.6°C | 23.8°C | 68 mm | 85% | 2.6 m/s | — |
| 1981 | 27.1°C | 25.8°C | 24.4°C | 28.1°C | 23.6°C | 452 mm | 90% | 2.9 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 27.8°C with lows near 24.7°C (mean 26.3°C), based on 45 years of NASA POWER data.
September averages 261 mm of rainfall in Ernakulam, a relatively wet time of year. The wettest on record was 634 mm in 1988.
The hottest September reached 31.1°C in 2024. The coldest dipped to 22.8°C in 2016.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.1°C. Daytime highs moved from 27.4°C to 28.3°C and overnight lows from 24.1°C to 25.3°C over the same span.
September is one of the cooler months of the year in Ernakulam and a relatively wet time of year, so plan for around 27.8°C daytime highs and 24.7°C at night.
Not quite — September is the 3rd coolest month in Ernakulam, averaging 26.3°C.
For September in Ernakulam, pack light layers you can adjust through the day, with typical highs of 27.8°C and lows of 24.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 88% — quite humid.
Average wind speed in September is 2.9 m/s. The windiest September on record averaged 3.5 m/s (1998).
The wettest September on record was 1988 with 634 mm. On average, September sees 261 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 Ernakulam 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.
