September is one of the cooler months of the year in Bangalore, with average highs near 28.1°C and lows around 19.2°C (mean 23.7°C). It is a relatively wet time of year, averaging 158 mm of rainfall and 81% relative humidity across the period.
September is one of the cooler months of the year in Bangalore. Across 45 years of records, the warmest September in Bangalore was 2002 — when the month averaged 25.2°C — while the coldest were 1983, 1996 and 2008 at 22.6°C. Typical September days reach 28.1°C with nights near 19.2°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Bangalore, averaging 158 mm of rainfall. The wettest September on record was 1986 with 292 mm, while the driest was 2016 at 34 mm.
Relative humidity in Bangalore during September averages 81%. The most humid September was 1998 at 88%, and the least humid was 2002 at 70%.
September receives about 5.1 kWh/m²/day of solar energy in Bangalore. The sunniest September was 2002 at 5.9 kWh/m²/day, and the cloudiest was 2020 at 4.5.
Average wind speed in Bangalore during September is 2.8 m/s. The windiest September was 1983 at 3.4 m/s, while the calmest was 2001 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.5°C | 23.4°C | 23.6°C | 24.0°C | 23.6°C | +0.1°C |
| Avg High | 28.0°C | 27.8°C | 27.9°C | 28.8°C | 27.8°C | -0.2°C |
| Avg Low | 19.0°C | 19.1°C | 19.3°C | 19.3°C | 19.5°C | +0.5°C |
| Avg Rain | 173 mm | 167 mm | 167 mm | 137 mm | 143 mm | -31 mm |
September temperatures in Bangalore have risen by about 0.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 15.5°C (1994) to a record high of 33.9°C (2002).
Rainfall in September is a relatively wet time of year, averaging 158 mm, with a wettest year of 292 mm.
A quieter season to visit Bangalore
If your dates are flexible, the more temperate months of January and December tend to be the most comfortable for visiting Bangalore. That said, September — with days averaging 28.1°C and nights around 19.2°C (mean 23.7°C) and higher rainfall (158 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 27.8°C | 23.7°C | 19.6°C | 30.3°C | 18.0°C | 152 mm | 83% | 2.6 m/s | 4.7 |
| 2024 | 29.6°C | 24.7°C | 19.8°C | 31.1°C | 18.2°C | 50 mm | 78% | 3.2 m/s | 5.1 |
| 2023 | 28.5°C | 24.1°C | 19.8°C | 32.0°C | 18.3°C | 170 mm | 81% | 3.1 m/s | 5.1 |
| 2022 | 26.8°C | 22.9°C | 19.0°C | 29.6°C | 17.2°C | 158 mm | 87% | 2.5 m/s | 4.9 |
| 2021 | 27.7°C | 23.5°C | 19.4°C | 29.8°C | 17.7°C | 130 mm | 83% | 2.9 m/s | 5 |
| 2020 | 26.5°C | 22.8°C | 19.1°C | 28.8°C | 16.3°C | 197 mm | 86% | 3 m/s | 4.5 |
| 2019 | 27.8°C | 23.7°C | 19.7°C | 30.8°C | 18.4°C | 161 mm | 82% | 3.1 m/s | 4.9 |
| 2018 | 30.5°C | 24.9°C | 19.3°C | 33.3°C | 17.0°C | 113 mm | 72% | 2.2 m/s | 5.8 |
| 2017 | 27.0°C | 23.3°C | 19.6°C | 29.2°C | 17.7°C | 270 mm | 86% | 2.2 m/s | 5 |
| 2016 | 29.8°C | 24.4°C | 19.0°C | 31.9°C | 17.5°C | 34 mm | 74% | 3.3 m/s | 5 |
| 2015 | 30.2°C | 25.0°C | 19.8°C | 33.7°C | 18.1°C | 99 mm | 74% | 2.6 m/s | 5.6 |
| 2014 | 29.1°C | 24.2°C | 19.3°C | 31.9°C | 18.0°C | 145 mm | 78% | 3.1 m/s | 5.4 |
| 2013 | 26.7°C | 22.9°C | 19.1°C | 28.7°C | 17.2°C | 257 mm | 86% | 2.7 m/s | 5.2 |
| 2012 | 29.7°C | 24.5°C | 19.3°C | 33.2°C | 18.0°C | 59 mm | 74% | 3.2 m/s | 5.4 |
| 2011 | 29.4°C | 24.2°C | 19.0°C | 32.0°C | 16.7°C | 95 mm | 77% | 3.3 m/s | 5.5 |
| 2010 | 27.5°C | 23.3°C | 19.0°C | 29.0°C | 17.5°C | 141 mm | 84% | 2.7 m/s | 5 |
| 2009 | 27.6°C | 23.6°C | 19.6°C | 30.9°C | 17.8°C | 267 mm | 83% | 2.8 m/s | 5.1 |
| 2008 | 26.6°C | 22.6°C | 18.7°C | 28.4°C | 16.4°C | 110 mm | 86% | 2.5 m/s | 5.7 |
| 2007 | 26.5°C | 22.8°C | 19.1°C | 28.6°C | 16.6°C | 221 mm | 87% | 3 m/s | 4.9 |
| 2006 | 29.5°C | 24.6°C | 19.6°C | 32.5°C | 17.7°C | 67 mm | 76% | 3.3 m/s | 5.2 |
| 2005 | 26.8°C | 23.2°C | 19.5°C | 28.7°C | 18.3°C | 173 mm | 86% | 2.9 m/s | 5.1 |
| 2004 | 26.3°C | 22.7°C | 19.2°C | 29.4°C | 17.1°C | 231 mm | 85% | 2.3 m/s | 5.2 |
| 2003 | 29.2°C | 24.3°C | 19.4°C | 31.6°C | 18.2°C | 65 mm | 76% | 3.1 m/s | 5.7 |
| 2002 🔥 | 31.1°C | 25.2°C | 19.4°C | 33.9°C | 17.1°C | 83 mm | 70% | 2.8 m/s | 5.9 |
| 2001 | 27.5°C | 23.5°C | 19.6°C | 31.5°C | 18.0°C | 242 mm | 81% | 2.1 m/s | 5.6 |
| 2000 | 27.5°C | 23.4°C | 19.3°C | 29.2°C | 18.4°C | 211 mm | 83% | 2.3 m/s | 5.3 |
| 1999 | 29.2°C | 24.2°C | 19.2°C | 32.2°C | 18.2°C | 185 mm | 76% | 2.9 m/s | 5.6 |
| 1998 | 26.2°C | 22.8°C | 19.4°C | 27.6°C | 18.1°C | 184 mm | 88% | 2.7 m/s | 5.1 |
| 1997 | 27.6°C | 23.5°C | 19.5°C | 31.1°C | 17.5°C | 208 mm | 82% | 2.2 m/s | 5 |
| 1996 | 26.3°C | 22.6°C | 19.0°C | 27.8°C | 17.4°C | 237 mm | 87% | 2.6 m/s | 4.7 |
| 1995 | 26.9°C | 23.0°C | 19.1°C | 28.9°C | 18.0°C | 184 mm | 84% | 3 m/s | 5 |
| 1994 | 29.8°C | 24.3°C | 18.8°C | 32.6°C | 15.5°C | 68 mm | 73% | 3.2 m/s | 5 |
| 1993 | 27.0°C | 22.8°C | 18.6°C | 29.1°C | 16.9°C | 198 mm | 83% | 2.8 m/s | 5 |
| 1992 | 27.8°C | 23.4°C | 19.0°C | 30.5°C | 17.7°C | 134 mm | 79% | 2.6 m/s | 4.6 |
| 1991 | 27.7°C | 23.4°C | 19.1°C | 30.9°C | 17.3°C | 181 mm | 81% | 2.3 m/s | 5.2 |
| 1990 | 29.1°C | 24.1°C | 19.0°C | 31.3°C | 18.0°C | 91 mm | 75% | 2.9 m/s | 5.1 |
| 1989 | 26.9°C | 22.9°C | 18.8°C | 29.8°C | 16.9°C | 203 mm | 83% | 2.5 m/s | 4.9 |
| 1988 | 26.3°C | 22.7°C | 19.1°C | 28.3°C | 17.4°C | 257 mm | 87% | 2.9 m/s | 4.7 |
| 1987 | 29.1°C | 24.4°C | 19.6°C | 31.6°C | 18.1°C | 87 mm | 77% | 2.4 m/s | 5.2 |
| 1986 🌧️ | 28.2°C | 23.8°C | 19.3°C | 31.9°C | 16.7°C | 292 mm | 78% | 2.4 m/s | 5.1 |
| 1985 | 29.1°C | 23.9°C | 18.7°C | 32.1°C | 17.0°C | 91 mm | 75% | 2.6 m/s | 5.1 |
| 1984 | 30.0°C | 24.5°C | 18.9°C | 33.0°C | 17.5°C | 94 mm | 72% | 2.6 m/s | 5.2 |
| 1983 ❄️ | 26.6°C | 22.6°C | 18.6°C | 28.6°C | 16.6°C | 178 mm | 85% | 3.4 m/s | — |
| 1982 | 28.8°C | 23.7°C | 18.5°C | 31.8°C | 16.8°C | 131 mm | 76% | 2.9 m/s | — |
| 1981 | 26.6°C | 22.8°C | 19.1°C | 28.4°C | 17.9°C | 226 mm | 86% | 2.5 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 28.1°C with lows near 19.2°C (mean 23.7°C), based on 45 years of NASA POWER data.
September averages 158 mm of rainfall in Bangalore, a relatively wet time of year. The wettest on record was 292 mm in 1986.
The hottest September reached 33.9°C in 2002. The coldest dipped to 15.5°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.3°C — but days and nights have moved in opposite directions. Overnight lows rose from 18.8°C to 19.5°C while daytime highs eased from 28.2°C to 28.1°C, narrowing the gap between day and night.
September is one of the cooler months of the year in Bangalore and a relatively wet time of year, so plan for around 28.1°C daytime highs and 19.2°C at night.
Not quite — September is the 5th coolest month in Bangalore, averaging 23.7°C.
For September in Bangalore, pack light layers you can adjust through the day, with typical highs of 28.1°C and lows of 19.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 81% — quite humid.
Average wind speed in September is 2.8 m/s. The windiest September on record averaged 3.4 m/s (1983).
The wettest September on record was 1986 with 292 mm. On average, September sees 158 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 Bangalore 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.
