September is one of the warmer months of the year in Kishanganj, with average highs near 33.6°C and lows around 22.6°C (mean 28.1°C). It is a relatively wet time of year, averaging 242 mm of rainfall and 86% relative humidity across the period.
September is one of the warmer months of the year in Kishanganj. Across 45 years of records, the warmest September in Kishanganj was 1993 — when the month averaged 30.4°C — while the coldest was 1984 at 26.1°C. Typical September days reach 33.6°C with nights near 22.6°C. The long-term September temperature trend is broadly flat.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.9°C | 28.5°C | 27.7°C | 28.1°C | 28.7°C | +0.8°C |
| Avg High | 33.6°C | 34.8°C | 32.9°C | 33.4°C | 33.3°C | -0.3°C |
| Avg Low | 22.1°C | 22.2°C | 22.5°C | 22.7°C | 24.1°C | +2°C |
| Avg Rain | 194 mm | 160 mm | 224 mm | 301 mm | 384 mm | +189 mm |
September temperatures in Kishanganj have risen by about 1.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 19.6°C (1994) to a record high of 37.2°C (1993).
Rainfall in September is a relatively wet time of year, averaging 242 mm, with a wettest year of 711 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A good time to visit Kishanganj
September is a good time to visit Kishanganj, with days averaging 33.6°C and nights around 22.6°C (mean 28.1°C, warmer than Kishanganj's yearly average) and higher rainfall. November and February are marginally more temperate, but September still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 33.0°C | 24.6°C | 28.8°C | 281 mm | 87% | 1.2 m/s | 4.4 |
| 2024 | 35.1°C | 23.3°C | 29.2°C | 452 mm | 86% | 1.7 m/s | 4.5 |
| 2023 | 33.8°C | 24.5°C | 29.2°C | 377 mm | 88% | 1.6 m/s | 4.4 |
| 2022 | 32.3°C | 23.7°C | 28.0°C | 303 mm | 90% | 1.7 m/s | 3.9 |
| 2021 | 32.5°C | 24.0°C | 28.3°C | 176 mm | 89% | 1.6 m/s | 4.6 |
| 2020 🌧️ | 32.9°C | 24.2°C | 28.6°C | 711 mm | 90% | 1.4 m/s | 3.2 |
| 2019 | 33.7°C | 21.7°C | 27.7°C | 492 mm | 90% | 1.7 m/s | 4 |
| 2018 | 33.4°C | 22.8°C | 28.1°C | 242 mm | 87% | 1.7 m/s | 4.4 |
| 2017 | 33.6°C | 24.6°C | 29.1°C | 161 mm | 89% | 1.6 m/s | 4.5 |
| 2016 | 32.2°C | 23.9°C | 28.0°C | 425 mm | 89% | 1.3 m/s | 3.9 |
| 2015 | 33.5°C | 21.8°C | 27.7°C | 255 mm | 86% | 1.4 m/s | 4.6 |
| 2014 | 33.7°C | 23.0°C | 28.3°C | 289 mm | 87% | 1.4 m/s | 4.4 |
| 2013 | 33.8°C | 22.7°C | 28.2°C | 174 mm | 86% | 1.5 m/s | 4.9 |
| 2012 | 35.1°C | 22.2°C | 28.7°C | 339 mm | 88% | 1.9 m/s | 4.5 |
| 2011 | 33.2°C | 23.0°C | 28.1°C | 316 mm | 89% | 2.1 m/s | 4.4 |
| 2010 | 32.2°C | 21.5°C | 26.9°C | 317 mm | 88% | 1.5 m/s | 4.3 |
| 2009 | 32.9°C | 23.0°C | 27.9°C | 100 mm | 88% | 1.8 m/s | 4.7 |
| 2008 | 32.4°C | 22.5°C | 27.4°C | 142 mm | 87% | 1.4 m/s | 4.7 |
| 2007 | 32.5°C | 21.3°C | 26.9°C | 302 mm | 88% | 1.8 m/s | 4.1 |
| 2006 | 34.1°C | 22.4°C | 28.2°C | 371 mm | 87% | 2.1 m/s | 4.2 |
| 2005 | 33.4°C | 23.6°C | 28.5°C | 154 mm | 86% | 1.4 m/s | 4.8 |
| 2004 | 32.2°C | 22.6°C | 27.4°C | 228 mm | 89% | 1.9 m/s | 4.2 |
| 2003 | 32.9°C | 23.0°C | 27.9°C | 160 mm | 88% | 1.8 m/s | 4.4 |
| 2002 | 33.0°C | 21.6°C | 27.3°C | 254 mm | 87% | 1.8 m/s | 4.6 |
| 2001 | 32.3°C | 23.2°C | 27.7°C | 327 mm | 87% | 1.4 m/s | 4.3 |
| 2000 | 33.2°C | 22.1°C | 27.7°C | 206 mm | 87% | 1.8 m/s | 4.2 |
| 1999 | 32.0°C | 22.4°C | 27.2°C | 174 mm | 90% | 1.9 m/s | 4.3 |
| 1998 | 33.1°C | 23.3°C | 28.2°C | 209 mm | 88% | 1.5 m/s | 4.5 |
| 1997 | 33.4°C | 20.9°C | 27.2°C | 278 mm | 88% | 1.6 m/s | 4.7 |
| 1996 | 34.9°C | 23.3°C | 29.1°C | 106 mm | 80% | 1.4 m/s | 4.6 |
| 1995 | 35.5°C | 22.3°C | 28.9°C | 95 mm | 81% | 2.4 m/s | 4.6 |
| 1994 | 36.5°C | 19.6°C | 28.0°C | 95 mm | 70% | 1.8 m/s | 5 |
| 1993 🔥 | 37.2°C | 23.5°C | 30.4°C | 130 mm | 76% | 2.1 m/s | 4.3 |
| 1992 | 36.9°C | 21.4°C | 29.2°C | 99 mm | 72% | 1.7 m/s | 4.2 |
| 1991 | 32.3°C | 23.5°C | 27.9°C | 269 mm | 88% | 1.8 m/s | 4 |
| 1990 | 35.9°C | 21.9°C | 28.9°C | 145 mm | 82% | 1.8 m/s | 3.9 |
| 1989 | 36.2°C | 23.9°C | 30.0°C | 167 mm | 78% | 2 m/s | 3.6 |
| 1988 | 35.6°C | 22.1°C | 28.9°C | 69 mm | 81% | 1.8 m/s | 4.3 |
| 1987 | 33.0°C | 22.0°C | 27.5°C | 180 mm | 88% | 1.6 m/s | 4.2 |
| 1986 | 33.4°C | 21.5°C | 27.5°C | 244 mm | 86% | 2 m/s | 4.3 |
| 1985 | 32.7°C | 22.5°C | 27.6°C | 198 mm | 85% | 1.5 m/s | 4.4 |
| 1984 ❄️ | 31.7°C | 20.5°C | 26.1°C | 310 mm | 87% | 1.7 m/s | 4.2 |
| 1983 | 33.1°C | 23.9°C | 28.5°C | 180 mm | 85% | 2 m/s | — |
| 1982 | 33.6°C | 20.1°C | 26.8°C | 201 mm | 84% | 1.5 m/s | — |
| 1981 | 33.1°C | 22.6°C | 27.9°C | 200 mm | 88% | 1.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 33.6°C with lows near 22.6°C (mean 28.1°C), based on 45 years of NASA POWER data.
September averages 242 mm of rainfall in Kishanganj, a relatively wet time of year. The wettest on record was 711 mm in 2020.
The hottest September reached 37.2°C in 1993. The coldest dipped to 19.6°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.3°C. Daytime highs moved from 32.8°C to 33.3°C and overnight lows from 21.9°C to 24°C over the same span.
September is one of the warmer months of the year in Kishanganj and a relatively wet time of year, so plan for around 33.6°C daytime highs and 22.6°C at night.
Not quite — September is the 7th coolest month in Kishanganj, averaging 28.1°C.
For September in Kishanganj, pack light, breathable clothing and sun protection, with typical highs of 33.6°C and lows of 22.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 86% — quite humid.
Average wind speed in September is 1.7 m/s. The windiest September on record averaged 2.4 m/s (1995).
The wettest September on record was 2020 with 711 mm. On average, September sees 242 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 Kishanganj 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.
