September is one of the warmer months of the year in West Delhi, with average highs near 37.4°C and lows around 20.3°C (mean 28.9°C). It is a relatively wet time of year, averaging 105 mm of rainfall and 65% relative humidity across the period.
September is one of the warmer months of the year in West Delhi. Across 45 years of records, the warmest September in West Delhi was 1999 — when the month averaged 33.1°C — while the coldest was 1994 at 24.9°C. Typical September days reach 37.4°C with nights near 20.3°C. The long-term trend is cooling, 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 | 29.6°C | 28.6°C | 29.5°C | 27.9°C | 28.7°C | -0.9°C |
| Avg High | 38.8°C | 37.1°C | 38.6°C | 36.1°C | 36.1°C | -2.7°C |
| Avg Low | 20.4°C | 20.1°C | 20.4°C | 19.8°C | 21.3°C | +0.9°C |
| Avg Rain | 71 mm | 116 mm | 94 mm | 106 mm | 153 mm | +82 mm |
September temperatures in West Delhi have fallen by about 0.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 15.9°C (1994) to a record high of 42.4°C (1999).
Rainfall in September is a relatively wet time of year, averaging 105 mm, with a wettest year of 252 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.6°C per decade while lows rose 0.1°C per decade, narrowing the gap between day and night.
A good time to visit West Delhi
September is a good time to visit West Delhi, with days averaging 37.4°C and nights around 20.3°C (mean 28.9°C, warmer than West Delhi's yearly average) and higher rainfall. November and March are marginally more temperate, but September still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 33.8°C | 19.9°C | 26.9°C | 144 mm | 80% | 2 m/s | 4.8 |
| 2024 | 34.6°C | 22.4°C | 28.5°C | 203 mm | 82% | 1.5 m/s | 4.1 |
| 2023 | 38.3°C | 20.6°C | 29.4°C | 80 mm | 69% | 2 m/s | 5 |
| 2022 | 39.2°C | 22.8°C | 31.0°C | 215 mm | 68% | 1.8 m/s | 4.5 |
| 2021 🌧️ | 33.0°C | 21.6°C | 27.3°C | 252 mm | 87% | 2.1 m/s | 4.2 |
| 2020 | 37.4°C | 20.4°C | 28.9°C | 26 mm | 63% | 1.5 m/s | 5.3 |
| 2019 | 38.7°C | 22.5°C | 30.6°C | 64 mm | 70% | 1.6 m/s | 4.3 |
| 2018 | 33.8°C | 19.3°C | 26.5°C | 182 mm | 76% | 1.9 m/s | 4.5 |
| 2017 | 37.9°C | 18.2°C | 28.0°C | 107 mm | 59% | 1.6 m/s | 4.9 |
| 2016 | 37.2°C | 21.8°C | 29.5°C | 31 mm | 61% | 1.5 m/s | 5.4 |
| 2015 | 39.1°C | 19.3°C | 29.2°C | 26 mm | 49% | 2 m/s | 5.8 |
| 2014 | 38.4°C | 21.0°C | 29.7°C | 63 mm | 58% | 2.1 m/s | 5.4 |
| 2013 | 35.1°C | 20.8°C | 27.9°C | 93 mm | 73% | 1.7 m/s | 5.4 |
| 2012 | 34.4°C | 18.3°C | 26.3°C | 66 mm | 75% | 1.9 m/s | 5.1 |
| 2011 | 33.8°C | 19.5°C | 26.6°C | 204 mm | 81% | 1.9 m/s | 5.1 |
| 2010 | 32.7°C | 17.4°C | 25.0°C | 229 mm | 83% | 1.6 m/s | 4 |
| 2009 | 36.5°C | 20.2°C | 28.3°C | 165 mm | 68% | 1.6 m/s | 5.2 |
| 2008 | 37.4°C | 19.7°C | 28.5°C | 138 mm | 74% | 1.5 m/s | 5.3 |
| 2007 | 39.4°C | 21.5°C | 30.5°C | 72 mm | 61% | 1.4 m/s | 5 |
| 2006 | 37.5°C | 20.2°C | 28.9°C | 91 mm | 62% | 1.8 m/s | 5.5 |
| 2005 | 41.3°C | 19.3°C | 30.3°C | 187 mm | 67% | 2.4 m/s | 4.8 |
| 2004 | 40.2°C | 21.4°C | 30.8°C | 12 mm | 53% | 1.8 m/s | 5.6 |
| 2003 | 35.6°C | 20.3°C | 27.9°C | 68 mm | 75% | 1.3 m/s | 4.2 |
| 2002 | 38.0°C | 20.3°C | 29.1°C | 145 mm | 63% | 1.7 m/s | 4.7 |
| 2001 | 39.8°C | 20.9°C | 30.4°C | 34 mm | 45% | 1.9 m/s | 5.8 |
| 2000 | 40.6°C | 20.7°C | 30.7°C | 23 mm | 46% | 1.8 m/s | 5.4 |
| 1999 🔥 | 42.4°C | 23.8°C | 33.1°C | 64 mm | 54% | 1.9 m/s | 4.5 |
| 1998 | 39.5°C | 21.8°C | 30.7°C | 173 mm | 71% | 1.8 m/s | 4.9 |
| 1997 | 38.7°C | 20.5°C | 29.6°C | 52 mm | 57% | 1.9 m/s | 5.1 |
| 1996 | 36.3°C | 18.5°C | 27.4°C | 129 mm | 73% | 1.7 m/s | 5.2 |
| 1995 | 34.7°C | 18.0°C | 26.3°C | 154 mm | 73% | 1.5 m/s | 5.4 |
| 1994 ❄️ | 34.0°C | 15.9°C | 24.9°C | 23 mm | 71% | 2 m/s | 5.8 |
| 1993 | 37.7°C | 21.5°C | 29.6°C | 167 mm | 71% | 1.7 m/s | 4.5 |
| 1992 | 37.0°C | 19.2°C | 28.1°C | 90 mm | 62% | 2.1 m/s | 5.2 |
| 1991 | 35.2°C | 19.0°C | 27.1°C | 96 mm | 69% | 1.8 m/s | 5.5 |
| 1990 | 35.6°C | 22.3°C | 28.9°C | 212 mm | 77% | 1.7 m/s | 4.7 |
| 1989 | 39.8°C | 21.1°C | 30.4°C | 80 mm | 53% | 1.8 m/s | 5.3 |
| 1988 | 37.5°C | 20.5°C | 29.0°C | 147 mm | 73% | 2.1 m/s | 5.4 |
| 1987 | 41.5°C | 21.0°C | 31.3°C | 27 mm | 42% | 1.8 m/s | 5.8 |
| 1986 | 41.6°C | 21.1°C | 31.3°C | 63 mm | 42% | 2.1 m/s | 5.5 |
| 1985 | 38.1°C | 20.7°C | 29.4°C | 56 mm | 62% | 2.1 m/s | 5.2 |
| 1984 | 34.3°C | 17.9°C | 26.1°C | 110 mm | 73% | 1.6 m/s | 5.6 |
| 1983 | 37.7°C | 21.9°C | 29.8°C | 88 mm | 69% | 1.6 m/s | — |
| 1982 | 38.5°C | 17.1°C | 27.8°C | 2 mm | 51% | 2.1 m/s | — |
| 1981 | 40.4°C | 22.2°C | 31.3°C | 70 mm | 52% | 2.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 37.4°C with lows near 20.3°C (mean 28.9°C), based on 45 years of NASA POWER data.
September averages 105 mm of rainfall in West Delhi, a relatively wet time of year. The wettest on record was 252 mm in 2021.
The hottest September reached 42.4°C in 1999. 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 fallen by about 0.3°C. Daytime highs moved from 37.8°C to 35.8°C and overnight lows from 20°C to 21.5°C over the same span.
September is one of the warmer months of the year in West Delhi and a relatively wet time of year, so plan for around 37.4°C daytime highs and 20.3°C at night.
Not quite — September is the 7th coolest month in West Delhi, averaging 28.9°C.
For September in West Delhi, pack light, breathable clothing and sun protection, with typical highs of 37.4°C and lows of 20.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 65% — moderately humid.
Average wind speed in September is 1.8 m/s. The windiest September on record averaged 2.4 m/s (2005).
The wettest September on record was 2021 with 252 mm. On average, September sees 105 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 West Delhi 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.
