September is close to Nilgiris's year-round average, with average highs near 30.7°C and lows around 17.8°C (mean 24.3°C). It is a relatively wet time of year, averaging 100 mm of rainfall and 82% relative humidity across the period.
September is close to Nilgiris's year-round average. Across 45 years of records, the warmest September in Nilgiris was 2015 — when the month averaged 26.3°C — while the coldest was 1983 at 22.1°C. Typical September days reach 30.7°C with nights near 17.8°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 | 23.8°C | 24.0°C | 24.4°C | 24.6°C | 24.4°C | +0.6°C |
| Avg High | 30.1°C | 30.5°C | 31.0°C | 31.3°C | 30.6°C | +0.5°C |
| Avg Low | 17.4°C | 17.6°C | 17.9°C | 17.9°C | 18.3°C | +0.9°C |
| Avg Rain | 106 mm | 78 mm | 101 mm | 114 mm | 104 mm | -2 mm |
September temperatures in Nilgiris have risen by about 1°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 15.9°C (1994) to a record high of 34.2°C (2015).
Rainfall in September is a relatively wet time of year, averaging 100 mm, with a wettest year of 257 mm.
A good time to visit Nilgiris
September is a good time to visit Nilgiris, with days averaging 30.7°C and nights around 17.8°C (mean 24.3°C, close to Nilgiris's yearly average) and higher rainfall. January and December are marginally more temperate, but September still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 32.0°C | 18.8°C | 25.4°C | 77 mm | 80% | 2.2 m/s | 4.6 |
| 2024 | 30.9°C | 18.6°C | 24.7°C | 40 mm | 81% | 2.4 m/s | 5 |
| 2023 | 31.2°C | 18.5°C | 24.8°C | 124 mm | 81% | 2.5 m/s | 4.5 |
| 2022 | 28.9°C | 18.2°C | 23.5°C | 101 mm | 87% | 1.8 m/s | 4.9 |
| 2021 | 30.6°C | 18.5°C | 24.5°C | 123 mm | 83% | 2.2 m/s | 4.6 |
| 2020 | 29.7°C | 17.3°C | 23.5°C | 159 mm | 86% | 2.4 m/s | 4.1 |
| 2019 | 29.5°C | 17.5°C | 23.5°C | 166 mm | 86% | 2 m/s | 4.5 |
| 2018 | 32.2°C | 18.0°C | 25.1°C | 120 mm | 78% | 1.8 m/s | 5.8 |
| 2017 🌧️ | 28.7°C | 17.8°C | 23.2°C | 257 mm | 87% | 1.7 m/s | 4.7 |
| 2016 | 32.0°C | 16.8°C | 24.4°C | 18 mm | 75% | 2.7 m/s | 5 |
| 2015 🔥 | 34.2°C | 18.4°C | 26.3°C | 86 mm | 76% | 2.1 m/s | 5.3 |
| 2014 | 29.9°C | 18.4°C | 24.1°C | 134 mm | 84% | 2.2 m/s | 5.1 |
| 2013 | 30.8°C | 18.0°C | 24.4°C | 107 mm | 84% | 2.3 m/s | 4.7 |
| 2012 | 32.9°C | 18.4°C | 25.7°C | 71 mm | 77% | 2.6 m/s | 5.2 |
| 2011 | 32.4°C | 17.5°C | 25.0°C | 91 mm | 81% | 2.6 m/s | 5 |
| 2010 | 30.0°C | 17.7°C | 23.8°C | 90 mm | 83% | 2 m/s | 4.6 |
| 2009 | 31.0°C | 17.7°C | 24.3°C | 111 mm | 84% | 2.3 m/s | 4.5 |
| 2008 | 30.6°C | 17.5°C | 24.1°C | 91 mm | 84% | 2.1 m/s | 5.3 |
| 2007 | 28.4°C | 17.2°C | 22.8°C | 153 mm | 89% | 2.3 m/s | 4.2 |
| 2006 | 30.1°C | 16.7°C | 23.4°C | 158 mm | 85% | 2.3 m/s | 4.7 |
| 2005 | 30.7°C | 18.2°C | 24.5°C | 89 mm | 84% | 2.6 m/s | 4.7 |
| 2004 | 30.5°C | 17.7°C | 24.1°C | 155 mm | 83% | 1.7 m/s | 4.9 |
| 2003 | 33.3°C | 18.5°C | 25.9°C | 24 mm | 77% | 2.5 m/s | 5.8 |
| 2002 | 32.6°C | 18.0°C | 25.3°C | 39 mm | 76% | 2.2 m/s | 5.9 |
| 2001 | 31.7°C | 18.4°C | 25.1°C | 102 mm | 81% | 1.9 m/s | 5.3 |
| 2000 | 30.7°C | 18.6°C | 24.7°C | 86 mm | 84% | 1.7 m/s | 4.8 |
| 1999 | 32.4°C | 17.5°C | 24.9°C | 36 mm | 77% | 2.3 m/s | 5.4 |
| 1998 | 28.9°C | 17.8°C | 23.4°C | 155 mm | 88% | 2.3 m/s | 4.6 |
| 1997 | 29.6°C | 18.0°C | 23.8°C | 76 mm | 85% | 1.8 m/s | 4.9 |
| 1996 | 27.5°C | 17.2°C | 22.3°C | 123 mm | 87% | 2.3 m/s | 4.5 |
| 1995 | 30.9°C | 17.9°C | 24.4°C | 76 mm | 83% | 2.5 m/s | 5.1 |
| 1994 | 31.9°C | 15.9°C | 23.9°C | 57 mm | 80% | 2.3 m/s | 5.6 |
| 1993 | 30.6°C | 17.8°C | 24.2°C | 42 mm | 80% | 2.1 m/s | 5.4 |
| 1992 | 29.7°C | 18.1°C | 23.9°C | 122 mm | 84% | 2 m/s | 4.6 |
| 1991 | 31.1°C | 17.2°C | 24.1°C | 47 mm | 81% | 1.8 m/s | 5 |
| 1990 | 31.9°C | 18.3°C | 25.1°C | 42 mm | 78% | 2.2 m/s | 5 |
| 1989 | 30.3°C | 16.9°C | 23.6°C | 109 mm | 82% | 2 m/s | 5.1 |
| 1988 | 27.5°C | 18.4°C | 22.9°C | 142 mm | 88% | 2.3 m/s | 4.9 |
| 1987 | 32.5°C | 17.9°C | 25.2°C | 33 mm | 77% | 2 m/s | 5.3 |
| 1986 | 31.3°C | 17.0°C | 24.2°C | 117 mm | 80% | 2.2 m/s | 4.4 |
| 1985 | 31.6°C | 17.5°C | 24.5°C | 78 mm | 79% | 2 m/s | 4.6 |
| 1984 | 32.1°C | 17.6°C | 24.8°C | 90 mm | 78% | 1.9 m/s | 4.8 |
| 1983 ❄️ | 27.7°C | 16.4°C | 22.1°C | 158 mm | 87% | 2.6 m/s | — |
| 1982 | 30.0°C | 17.2°C | 23.6°C | 44 mm | 80% | 2.3 m/s | — |
| 1981 | 28.1°C | 17.9°C | 23.0°C | 180 mm | 89% | 1.8 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 30.7°C with lows near 17.8°C (mean 24.3°C), based on 45 years of NASA POWER data.
September averages 100 mm of rainfall in Nilgiris, a relatively wet time of year. The wettest on record was 257 mm in 2017.
The hottest September reached 34.2°C in 2015. The coldest dipped to 15.9°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1°C. Daytime highs moved from 29.9°C to 30.7°C and overnight lows from 17.3°C to 18.5°C over the same span.
September is close to Nilgiris's year-round average and a relatively wet time of year, so plan for around 30.7°C daytime highs and 17.8°C at night.
Not quite — September is the 8th coolest month in Nilgiris, averaging 24.3°C.
For September in Nilgiris, pack light, breathable clothing and sun protection, with typical highs of 30.7°C and lows of 17.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 82% — quite humid.
Average wind speed in September is 2.2 m/s. The windiest September on record averaged 2.7 m/s (2016).
The wettest September on record was 2017 with 257 mm. On average, September sees 100 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 Nilgiris 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.
