September is one of the warmer months of the year in Ranchi, with average highs near 29.1°C and lows around 22.9°C (mean 26°C). It is a relatively wet time of year, averaging 228 mm of rainfall and 88% relative humidity across the period.
September is one of the warmer months of the year in Ranchi. Across 45 years of records, the warmest September in Ranchi was 2017 — when the month averaged 26.9°C — while the coldest was 1984 at 25°C. Typical September days reach 29.1°C with nights near 22.9°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Ranchi, averaging 228 mm of rainfall. The wettest September on record was 2024 with 554 mm, while the driest was 2001 at 91 mm.
Relative humidity in Ranchi during September averages 88%. The most humid September was 1999 at 92%, and the least humid was 1986 at 82%.
September receives about 4.4 kWh/m²/day of solar energy in Ranchi. The sunniest September was 2015 at 5.1 kWh/m²/day, and the cloudiest were 1993 and 2023 at 3.7.
Average wind speed in Ranchi during September is 1.9 m/s. The windiest September was 2011 at 2.5 m/s, while the calmest was 2017 at 1.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.0°C | 25.7°C | 25.9°C | 26.2°C | 26.4°C | +0.4°C |
| Avg High | 29.3°C | 28.8°C | 28.9°C | 29.3°C | 29.1°C | -0.2°C |
| Avg Low | 22.7°C | 22.6°C | 22.9°C | 23.0°C | 23.6°C | +0.9°C |
| Avg Rain | 179 mm | 220 mm | 221 mm | 241 mm | 306 mm | +127 mm |
September temperatures in Ranchi have risen by about 0.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 16.9°C (1984) to a record high of 32.5°C (1986).
Rainfall in September is a relatively wet time of year, averaging 228 mm, with a wettest year of 554 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Ranchi
September is a good time to visit Ranchi, with days averaging 29.1°C and nights around 22.9°C (mean 26°C, warmer than Ranchi's yearly average) and higher rainfall. February and November 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 | 29.1°C | 26.3°C | 23.4°C | 31.1°C | 22.6°C | 221 mm | 89% | 1.6 m/s | 4.1 |
| 2024 🌧️ | 29.0°C | 26.5°C | 23.9°C | 31.2°C | 21.3°C | 554 mm | 91% | 2.4 m/s | 4.2 |
| 2023 | 29.5°C | 26.7°C | 23.8°C | 32.3°C | 22.9°C | 276 mm | 89% | 1.9 m/s | 3.7 |
| 2022 | 29.1°C | 26.3°C | 23.5°C | 30.5°C | 22.5°C | 203 mm | 89% | 1.8 m/s | 3.9 |
| 2021 | 28.7°C | 25.9°C | 23.2°C | 30.8°C | 21.9°C | 375 mm | 90% | 2.3 m/s | 4 |
| 2020 | 29.3°C | 26.5°C | 23.6°C | 31.7°C | 20.1°C | 206 mm | 89% | 1.6 m/s | 4.3 |
| 2019 | 28.9°C | 26.1°C | 23.4°C | 31.3°C | 20.8°C | 317 mm | 90% | 2.1 m/s | 3.9 |
| 2018 | 29.2°C | 26.0°C | 22.7°C | 30.6°C | 20.2°C | 185 mm | 87% | 1.9 m/s | 4.3 |
| 2017 🔥 | 30.1°C | 26.9°C | 23.6°C | 31.7°C | 22.3°C | 197 mm | 86% | 1.3 m/s | 4.6 |
| 2016 | 28.9°C | 26.1°C | 23.3°C | 30.8°C | 22.1°C | 326 mm | 90% | 1.8 m/s | 4 |
| 2015 | 30.2°C | 26.5°C | 22.8°C | 31.6°C | 19.8°C | 99 mm | 83% | 1.7 m/s | 5.1 |
| 2014 | 29.7°C | 26.2°C | 22.6°C | 31.1°C | 19.9°C | 150 mm | 86% | 1.8 m/s | 4.7 |
| 2013 | 29.1°C | 26.0°C | 22.9°C | 30.7°C | 21.4°C | 231 mm | 88% | 1.7 m/s | 4.3 |
| 2012 | 28.6°C | 25.6°C | 22.6°C | 30.4°C | 18.4°C | 253 mm | 89% | 1.6 m/s | 4.5 |
| 2011 | 28.3°C | 25.8°C | 23.2°C | 30.1°C | 20.5°C | 358 mm | 91% | 2.5 m/s | 3.8 |
| 2010 | 29.7°C | 26.3°C | 22.8°C | 32.2°C | 19.0°C | 297 mm | 85% | 2 m/s | 4.5 |
| 2009 | 29.4°C | 26.3°C | 23.1°C | 30.8°C | 21.8°C | 276 mm | 88% | 1.8 m/s | 4.6 |
| 2008 | 28.9°C | 25.8°C | 22.6°C | 31.2°C | 20.1°C | 167 mm | 88% | 1.9 m/s | 4.8 |
| 2007 | 28.2°C | 25.7°C | 23.3°C | 30.7°C | 21.9°C | 330 mm | 91% | 2.2 m/s | 4.1 |
| 2006 | 28.8°C | 25.7°C | 22.7°C | 31.0°C | 20.7°C | 276 mm | 89% | 1.9 m/s | 4.2 |
| 2005 | 29.3°C | 26.1°C | 23.0°C | 31.5°C | 21.1°C | 152 mm | 88% | 2.3 m/s | 4.7 |
| 2004 | 28.9°C | 25.9°C | 23.0°C | 31.7°C | 20.5°C | 137 mm | 88% | 1.9 m/s | 4.3 |
| 2003 | 28.9°C | 26.2°C | 23.6°C | 30.4°C | 22.3°C | 235 mm | 90% | 1.9 m/s | 4.2 |
| 2002 | 28.6°C | 25.5°C | 22.4°C | 30.4°C | 20.5°C | 282 mm | 89% | 2 m/s | 4.4 |
| 2001 | 29.2°C | 26.0°C | 22.9°C | 30.3°C | 20.8°C | 91 mm | 87% | 1.8 m/s | 4.7 |
| 2000 | 28.9°C | 25.8°C | 22.6°C | 30.5°C | 20.0°C | 264 mm | 88% | 2.2 m/s | 4.1 |
| 1999 | 28.1°C | 25.6°C | 23.1°C | 29.7°C | 21.7°C | 151 mm | 92% | 2.1 m/s | 4.3 |
| 1998 | 28.7°C | 26.1°C | 23.4°C | 31.8°C | 22.2°C | 328 mm | 90% | 1.9 m/s | 4.5 |
| 1997 | 29.0°C | 25.7°C | 22.4°C | 31.0°C | 19.4°C | 147 mm | 88% | 1.6 m/s | 4.5 |
| 1996 | 29.2°C | 26.0°C | 22.7°C | 30.5°C | 21.1°C | 134 mm | 87% | 1.6 m/s | 4.7 |
| 1995 | 28.7°C | 25.7°C | 22.7°C | 30.9°C | 19.7°C | 353 mm | 89% | 2 m/s | 4 |
| 1994 | 28.6°C | 25.1°C | 21.7°C | 31.0°C | 17.4°C | 155 mm | 85% | 2.3 m/s | 4.6 |
| 1993 | 28.4°C | 25.5°C | 22.6°C | 30.9°C | 21.2°C | 342 mm | 89% | 2.2 m/s | 3.7 |
| 1992 | 29.3°C | 25.6°C | 21.9°C | 30.5°C | 20.1°C | 110 mm | 85% | 2.1 m/s | 4.8 |
| 1991 | 28.6°C | 25.6°C | 22.6°C | 30.4°C | 20.0°C | 278 mm | 89% | 1.6 m/s | 4.3 |
| 1990 | 28.9°C | 26.1°C | 23.3°C | 30.6°C | 21.8°C | 203 mm | 90% | 1.9 m/s | 4 |
| 1989 | 29.9°C | 26.6°C | 23.3°C | 32.3°C | 21.6°C | 138 mm | 85% | 1.8 m/s | 4.6 |
| 1988 | 29.6°C | 26.4°C | 23.3°C | 31.6°C | 21.5°C | 138 mm | 87% | 1.7 m/s | 4.8 |
| 1987 | 29.5°C | 26.4°C | 23.4°C | 31.9°C | 20.3°C | 289 mm | 88% | 1.9 m/s | 4.3 |
| 1986 | 29.7°C | 26.0°C | 22.4°C | 32.5°C | 20.0°C | 117 mm | 82% | 2.2 m/s | 4.6 |
| 1985 | 28.9°C | 25.7°C | 22.6°C | 30.8°C | 20.8°C | 214 mm | 87% | 1.8 m/s | 4.7 |
| 1984 ❄️ | 28.5°C | 25.0°C | 21.5°C | 29.9°C | 16.9°C | 138 mm | 86% | 2 m/s | 4.6 |
| 1983 | 29.5°C | 26.3°C | 23.2°C | 31.8°C | 21.4°C | 204 mm | 87% | 1.8 m/s | — |
| 1982 | 30.0°C | 25.9°C | 21.8°C | 31.5°C | 18.2°C | 133 mm | 83% | 1.8 m/s | — |
| 1981 | 28.5°C | 25.8°C | 23.0°C | 31.6°C | 21.0°C | 244 mm | 89% | 2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 29.1°C with lows near 22.9°C (mean 26°C), based on 45 years of NASA POWER data.
September averages 228 mm of rainfall in Ranchi, a relatively wet time of year. The wettest on record was 554 mm in 2024.
The hottest September reached 32.5°C in 1986. The coldest dipped to 16.9°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.6°C. Daytime highs moved from 29.1°C to 29.1°C and overnight lows from 22.4°C to 23.6°C over the same span.
September is one of the warmer months of the year in Ranchi and a relatively wet time of year, so plan for around 29.1°C daytime highs and 22.9°C at night.
Not quite — September is the 7th coolest month in Ranchi, averaging 26°C.
For September in Ranchi, pack light layers you can adjust through the day, with typical highs of 29.1°C and lows of 22.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 88% — quite humid.
Average wind speed in September is 1.9 m/s. The windiest September on record averaged 2.5 m/s (2011).
The wettest September on record was 2024 with 554 mm. On average, September sees 228 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 Ranchi 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.
