September is one of the warmer months of the year in Bhagalpur, with average highs near 31.1°C and lows around 24.7°C (mean 27.9°C). It is a relatively wet time of year, averaging 189 mm of rainfall and 86% relative humidity across the period.
September is one of the warmer months of the year in Bhagalpur. Across 45 years of records, the warmest September in Bhagalpur was 1992 — when the month averaged 29.3°C — while the coldest was 1984 at 26.5°C. Typical September days reach 31.1°C with nights near 24.7°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Bhagalpur, averaging 189 mm of rainfall. The wettest September on record was 2019 with 403 mm, while the driest was 1992 at 61 mm.
Relative humidity in Bhagalpur during September averages 86%. The most humid September was 1999 at 90%, and the least humid was 1992 at 73%.
September receives about 4.6 kWh/m²/day of solar energy in Bhagalpur. The sunniest September was 1994 at 5.2 kWh/m²/day, and the cloudiest were 2019 and 2020 at 3.8.
Average wind speed in Bhagalpur during September is 1.9 m/s. The windiest September was 2011 at 2.6 m/s, while the calmest were 2001, 2020 and 2025, among others at 1.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.0°C | 27.8°C | 27.7°C | 28.0°C | 28.2°C | +0.2°C |
| Avg High | 31.5°C | 31.1°C | 30.8°C | 31.2°C | 30.9°C | -0.6°C |
| Avg Low | 24.5°C | 24.5°C | 24.7°C | 24.9°C | 25.4°C | +0.9°C |
| Avg Rain | 165 mm | 152 mm | 200 mm | 192 mm | 264 mm | +99 mm |
September temperatures in Bhagalpur have risen by about 0.5°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 18.6°C (1984) to a record high of 37.9°C (1992).
Rainfall in September is a relatively wet time of year, averaging 189 mm, with a wettest year of 403 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Bhagalpur
September is a good time to visit Bhagalpur, with days averaging 31.1°C and nights around 24.7°C (mean 27.9°C, warmer than Bhagalpur's yearly average) and higher rainfall. November and February 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 | 31.2°C | 28.2°C | 25.2°C | 32.5°C | 24.4°C | 155 mm | 87% | 1.5 m/s | 4.5 |
| 2024 | 31.1°C | 28.4°C | 25.7°C | 33.6°C | 24.0°C | 323 mm | 89% | 2.2 m/s | 4.5 |
| 2023 | 30.6°C | 28.2°C | 25.7°C | 33.2°C | 24.2°C | 374 mm | 89% | 1.9 m/s | 4.1 |
| 2022 | 31.0°C | 28.1°C | 25.3°C | 32.9°C | 23.8°C | 223 mm | 87% | 1.7 m/s | 3.9 |
| 2021 | 30.9°C | 28.0°C | 25.1°C | 33.0°C | 23.6°C | 130 mm | 88% | 2 m/s | 4.6 |
| 2020 | 30.8°C | 28.2°C | 25.6°C | 33.3°C | 23.5°C | 380 mm | 88% | 1.5 m/s | 3.8 |
| 2019 🌧️ | 30.7°C | 28.0°C | 25.3°C | 33.5°C | 22.9°C | 403 mm | 88% | 2 m/s | 3.8 |
| 2018 | 31.6°C | 28.2°C | 24.9°C | 32.6°C | 23.0°C | 115 mm | 85% | 1.9 m/s | 4.9 |
| 2017 | 31.5°C | 28.5°C | 25.5°C | 33.4°C | 24.2°C | 158 mm | 87% | 1.6 m/s | 4.6 |
| 2016 | 30.8°C | 28.0°C | 25.2°C | 32.7°C | 24.2°C | 338 mm | 88% | 1.6 m/s | 4.1 |
| 2015 | 31.9°C | 28.2°C | 24.6°C | 33.9°C | 21.9°C | 178 mm | 83% | 1.7 m/s | 5 |
| 2014 | 31.2°C | 27.9°C | 24.7°C | 33.4°C | 22.1°C | 122 mm | 85% | 1.7 m/s | 4.6 |
| 2013 | 32.5°C | 28.7°C | 25.0°C | 34.7°C | 23.6°C | 98 mm | 80% | 1.8 m/s | 5 |
| 2012 | 30.7°C | 27.4°C | 24.1°C | 33.3°C | 20.5°C | 143 mm | 86% | 1.9 m/s | 4.5 |
| 2011 | 30.2°C | 27.5°C | 24.9°C | 32.8°C | 22.2°C | 205 mm | 89% | 2.6 m/s | 4.5 |
| 2010 | 30.9°C | 27.8°C | 24.7°C | 33.2°C | 22.1°C | 161 mm | 86% | 1.9 m/s | 4.7 |
| 2009 | 31.0°C | 27.9°C | 24.8°C | 32.8°C | 23.6°C | 164 mm | 87% | 1.8 m/s | 4.9 |
| 2008 | 30.8°C | 27.7°C | 24.5°C | 33.0°C | 21.8°C | 162 mm | 86% | 1.7 m/s | 4.9 |
| 2007 | 30.4°C | 27.6°C | 24.7°C | 31.9°C | 23.4°C | 285 mm | 89% | 2.1 m/s | 4.3 |
| 2006 | 30.6°C | 27.6°C | 24.5°C | 33.0°C | 23.6°C | 347 mm | 87% | 2.2 m/s | 4.4 |
| 2005 | 31.1°C | 28.0°C | 24.9°C | 33.0°C | 23.6°C | 114 mm | 86% | 1.9 m/s | 4.8 |
| 2004 | 30.4°C | 27.5°C | 24.5°C | 33.2°C | 22.8°C | 117 mm | 87% | 2.1 m/s | 4.6 |
| 2003 | 31.7°C | 28.6°C | 25.4°C | 33.6°C | 23.9°C | 149 mm | 84% | 2.2 m/s | 4.8 |
| 2002 | 30.5°C | 27.3°C | 24.0°C | 32.3°C | 22.4°C | 223 mm | 86% | 2.1 m/s | 4.7 |
| 2001 | 30.9°C | 27.9°C | 24.8°C | 32.4°C | 23.2°C | 195 mm | 86% | 1.5 m/s | 4.4 |
| 2000 | 30.3°C | 27.3°C | 24.4°C | 32.5°C | 21.1°C | 242 mm | 88% | 2.3 m/s | 4.3 |
| 1999 | 29.9°C | 27.3°C | 24.6°C | 31.6°C | 22.8°C | 114 mm | 90% | 2.5 m/s | 4.3 |
| 1998 | 30.7°C | 27.8°C | 24.9°C | 32.9°C | 23.9°C | 212 mm | 88% | 1.9 m/s | 4.6 |
| 1997 | 30.6°C | 27.4°C | 24.2°C | 31.8°C | 20.0°C | 135 mm | 87% | 1.7 m/s | 4.7 |
| 1996 | 31.5°C | 28.1°C | 24.7°C | 33.2°C | 23.6°C | 100 mm | 83% | 1.5 m/s | 4.8 |
| 1995 | 30.6°C | 27.6°C | 24.6°C | 32.5°C | 22.7°C | 177 mm | 87% | 2.4 m/s | 4.7 |
| 1994 | 31.8°C | 27.6°C | 23.5°C | 33.5°C | 18.8°C | 100 mm | 79% | 2.3 m/s | 5.2 |
| 1993 | 30.6°C | 27.5°C | 24.4°C | 33.7°C | 23.2°C | 229 mm | 85% | 2.2 m/s | 4.2 |
| 1992 🔥 | 34.1°C | 29.3°C | 24.5°C | 37.9°C | 21.9°C | 61 mm | 73% | 2.3 m/s | 5 |
| 1991 | 30.3°C | 27.4°C | 24.6°C | 32.8°C | 22.3°C | 235 mm | 88% | 1.8 m/s | 4.3 |
| 1990 | 31.2°C | 28.1°C | 24.9°C | 34.3°C | 23.4°C | 161 mm | 86% | 1.9 m/s | 4.4 |
| 1989 | 32.6°C | 29.0°C | 25.3°C | 36.6°C | 24.1°C | 164 mm | 80% | 2.2 m/s | 4.3 |
| 1988 | 31.7°C | 28.4°C | 25.0°C | 33.6°C | 22.8°C | 104 mm | 85% | 1.6 m/s | 5 |
| 1987 | 30.9°C | 27.9°C | 24.9°C | 32.9°C | 22.2°C | 273 mm | 88% | 1.9 m/s | 4.7 |
| 1986 | 31.8°C | 28.0°C | 24.2°C | 34.6°C | 21.9°C | 140 mm | 80% | 2.5 m/s | 4.7 |
| 1985 | 31.0°C | 27.7°C | 24.4°C | 33.2°C | 22.3°C | 204 mm | 85% | 1.7 m/s | 5 |
| 1984 ❄️ | 30.0°C | 26.5°C | 23.1°C | 31.3°C | 18.6°C | 187 mm | 86% | 1.8 m/s | 4.8 |
| 1983 | 32.8°C | 29.1°C | 25.3°C | 35.2°C | 23.9°C | 99 mm | 79% | 2.2 m/s | — |
| 1982 | 31.8°C | 27.8°C | 23.9°C | 33.6°C | 19.9°C | 119 mm | 82% | 1.9 m/s | — |
| 1981 | 30.5°C | 27.6°C | 24.7°C | 32.6°C | 22.9°C | 199 mm | 88% | 1.8 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 31.1°C with lows near 24.7°C (mean 27.9°C), based on 45 years of NASA POWER data.
September averages 189 mm of rainfall in Bhagalpur, a relatively wet time of year. The wettest on record was 403 mm in 2019.
The hottest September reached 37.9°C in 1992. The coldest dipped to 18.6°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.5°C — but days and nights have moved in opposite directions. Overnight lows rose from 24.3°C to 25.4°C while daytime highs eased from 31.2°C to 31°C, narrowing the gap between day and night.
September is one of the warmer months of the year in Bhagalpur and a relatively wet time of year, so plan for around 31.1°C daytime highs and 24.7°C at night.
Not quite — September is the 7th coolest month in Bhagalpur, averaging 27.9°C.
For September in Bhagalpur, pack light, breathable clothing and sun protection, with typical highs of 31.1°C and lows of 24.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 86% — quite humid.
Average wind speed in September is 1.9 m/s. The windiest September on record averaged 2.6 m/s (2011).
The wettest September on record was 2019 with 403 mm. On average, September sees 189 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 Bhagalpur 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.
