September is close to Nilgiris's year-round average, with average highs near 28°C and lows around 19.4°C (mean 23.7°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 25.1°C — while the coldest was 1983 at 22.3°C. Typical September days reach 28°C with nights near 19.4°C. The long-term trend is warming, about 0.2°C per decade.
September is a relatively wet time of year in Nilgiris, averaging 100 mm of rainfall. The wettest September on record was 2017 with 257 mm, while the driest was 2016 at 18 mm.
Relative humidity in Nilgiris during September averages 82%. The most humid September was 1981 at 89%, and the least humid was 2016 at 75%.
September receives about 4.9 kWh/m²/day of solar energy in Nilgiris. The sunniest September was 2002 at 5.9 kWh/m²/day, and the cloudiest was 2020 at 4.1.
Average wind speed in Nilgiris during September is 2.2 m/s. The windiest September was 2016 at 2.7 m/s, while the calmest were 2000, 2004 and 2017 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.4°C | 23.5°C | 23.7°C | 23.9°C | 23.9°C | +0.5°C |
| Avg High | 27.6°C | 27.8°C | 27.9°C | 28.4°C | 28.1°C | +0.5°C |
| Avg Low | 19.1°C | 19.2°C | 19.5°C | 19.4°C | 19.7°C | +0.6°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 28°C and nights around 19.4°C (mean 23.7°C, close to Nilgiris'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 | 29.2°C | 24.7°C | 20.1°C | 32.0°C | 18.8°C | 77 mm | 80% | 2.2 m/s | 4.6 |
| 2024 | 29.0°C | 24.5°C | 20.0°C | 30.9°C | 18.6°C | 40 mm | 81% | 2.4 m/s | 5 |
| 2023 | 28.8°C | 24.3°C | 19.8°C | 31.2°C | 18.5°C | 124 mm | 81% | 2.5 m/s | 4.5 |
| 2022 | 27.0°C | 23.1°C | 19.2°C | 28.9°C | 18.2°C | 101 mm | 87% | 1.8 m/s | 4.9 |
| 2021 | 27.9°C | 23.8°C | 19.7°C | 30.6°C | 18.5°C | 123 mm | 83% | 2.2 m/s | 4.6 |
| 2020 | 26.9°C | 23.1°C | 19.4°C | 29.7°C | 17.3°C | 159 mm | 86% | 2.4 m/s | 4.1 |
| 2019 | 26.9°C | 23.2°C | 19.6°C | 29.5°C | 17.5°C | 166 mm | 86% | 2 m/s | 4.5 |
| 2018 | 30.0°C | 24.7°C | 19.4°C | 32.2°C | 18.0°C | 120 mm | 78% | 1.8 m/s | 5.8 |
| 2017 🌧️ | 26.6°C | 23.3°C | 19.9°C | 28.7°C | 17.8°C | 257 mm | 87% | 1.7 m/s | 4.7 |
| 2016 | 29.9°C | 24.5°C | 19.1°C | 32.0°C | 16.8°C | 18 mm | 75% | 2.7 m/s | 5 |
| 2015 🔥 | 30.1°C | 25.1°C | 20.1°C | 34.2°C | 18.4°C | 86 mm | 76% | 2.1 m/s | 5.3 |
| 2014 | 27.7°C | 23.6°C | 19.5°C | 29.9°C | 18.4°C | 134 mm | 84% | 2.2 m/s | 5.1 |
| 2013 | 27.5°C | 23.4°C | 19.2°C | 30.8°C | 18.0°C | 107 mm | 84% | 2.3 m/s | 4.7 |
| 2012 | 29.4°C | 24.4°C | 19.3°C | 32.9°C | 18.4°C | 71 mm | 77% | 2.6 m/s | 5.2 |
| 2011 | 28.5°C | 23.8°C | 19.2°C | 32.4°C | 17.5°C | 91 mm | 81% | 2.6 m/s | 5 |
| 2010 | 27.5°C | 23.3°C | 19.1°C | 30.0°C | 17.7°C | 90 mm | 83% | 2 m/s | 4.6 |
| 2009 | 27.7°C | 23.6°C | 19.6°C | 31.0°C | 17.7°C | 111 mm | 84% | 2.3 m/s | 4.5 |
| 2008 | 27.3°C | 23.2°C | 19.0°C | 30.6°C | 17.5°C | 91 mm | 84% | 2.1 m/s | 5.3 |
| 2007 | 26.0°C | 22.7°C | 19.3°C | 28.4°C | 17.2°C | 153 mm | 89% | 2.3 m/s | 4.2 |
| 2006 | 27.1°C | 23.3°C | 19.6°C | 30.1°C | 16.7°C | 158 mm | 85% | 2.3 m/s | 4.7 |
| 2005 | 27.5°C | 23.6°C | 19.8°C | 30.7°C | 18.2°C | 89 mm | 84% | 2.6 m/s | 4.7 |
| 2004 | 27.3°C | 23.3°C | 19.3°C | 30.5°C | 17.7°C | 155 mm | 83% | 1.7 m/s | 4.9 |
| 2003 | 29.8°C | 24.8°C | 19.7°C | 33.3°C | 18.5°C | 24 mm | 77% | 2.5 m/s | 5.8 |
| 2002 | 30.1°C | 24.8°C | 19.5°C | 32.6°C | 18.0°C | 39 mm | 76% | 2.2 m/s | 5.9 |
| 2001 | 28.1°C | 23.8°C | 19.6°C | 31.7°C | 18.4°C | 102 mm | 81% | 1.9 m/s | 5.3 |
| 2000 | 27.7°C | 23.7°C | 19.7°C | 30.7°C | 18.6°C | 86 mm | 84% | 1.7 m/s | 4.8 |
| 1999 | 29.2°C | 24.4°C | 19.5°C | 32.4°C | 17.5°C | 36 mm | 77% | 2.3 m/s | 5.4 |
| 1998 | 26.4°C | 22.9°C | 19.5°C | 28.9°C | 17.8°C | 155 mm | 88% | 2.3 m/s | 4.6 |
| 1997 | 27.4°C | 23.4°C | 19.3°C | 29.6°C | 18.0°C | 76 mm | 85% | 1.8 m/s | 4.9 |
| 1996 | 26.1°C | 22.5°C | 18.9°C | 27.5°C | 17.2°C | 123 mm | 87% | 2.3 m/s | 4.5 |
| 1995 | 27.8°C | 23.6°C | 19.4°C | 30.9°C | 17.9°C | 76 mm | 83% | 2.5 m/s | 5.1 |
| 1994 | 28.4°C | 23.6°C | 18.9°C | 31.9°C | 15.9°C | 57 mm | 80% | 2.3 m/s | 5.6 |
| 1993 | 28.3°C | 23.6°C | 18.9°C | 30.6°C | 17.8°C | 42 mm | 80% | 2.1 m/s | 5.4 |
| 1992 | 26.8°C | 23.0°C | 19.1°C | 29.7°C | 18.1°C | 122 mm | 84% | 2 m/s | 4.6 |
| 1991 | 28.2°C | 23.7°C | 19.1°C | 31.1°C | 17.2°C | 47 mm | 81% | 1.8 m/s | 5 |
| 1990 | 28.9°C | 24.1°C | 19.2°C | 31.9°C | 18.3°C | 42 mm | 78% | 2.2 m/s | 5 |
| 1989 | 27.7°C | 23.4°C | 19.2°C | 30.3°C | 16.9°C | 109 mm | 82% | 2 m/s | 5.1 |
| 1988 | 26.1°C | 22.8°C | 19.4°C | 27.5°C | 18.4°C | 142 mm | 88% | 2.3 m/s | 4.9 |
| 1987 | 29.6°C | 24.7°C | 19.9°C | 32.5°C | 17.9°C | 33 mm | 77% | 2 m/s | 5.3 |
| 1986 | 28.4°C | 23.8°C | 19.3°C | 31.3°C | 17.0°C | 117 mm | 80% | 2.2 m/s | 4.4 |
| 1985 | 28.2°C | 23.5°C | 18.9°C | 31.6°C | 17.5°C | 78 mm | 79% | 2 m/s | 4.6 |
| 1984 | 28.8°C | 23.9°C | 19.0°C | 32.1°C | 17.6°C | 90 mm | 78% | 1.9 m/s | 4.8 |
| 1983 ❄️ | 26.0°C | 22.3°C | 18.5°C | 27.7°C | 16.4°C | 158 mm | 87% | 2.6 m/s | — |
| 1982 | 28.2°C | 23.4°C | 18.6°C | 30.0°C | 17.2°C | 44 mm | 80% | 2.3 m/s | — |
| 1981 | 25.8°C | 22.6°C | 19.3°C | 28.1°C | 17.9°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 28°C with lows near 19.4°C (mean 23.7°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 27.4°C to 28.4°C and overnight lows from 18.9°C to 19.8°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 28°C daytime highs and 19.4°C at night.
Not quite — September is the 7th coolest month in Nilgiris, averaging 23.7°C.
For September in Nilgiris, pack light layers you can adjust through the day, with typical highs of 28°C and lows of 19.4°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.
