September is one of the warmer months of the year in Gopalganj, with average highs near 33.9°C and lows around 22.1°C (mean 28°C). It is a relatively wet time of year, averaging 176 mm of rainfall and 83% relative humidity across the period.
September is one of the warmer months of the year in Gopalganj. Across 45 years of records, the warmest September in Gopalganj was 1983 — when the month averaged 31.3°C — while the coldest was 1984 at 24.8°C. Typical September days reach 33.9°C with nights near 22.1°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 | 28.1°C | 27.7°C | 28.0°C | 27.9°C | 28.7°C | +0.6°C |
| Avg High | 34.5°C | 33.8°C | 33.7°C | 33.9°C | 33.9°C | -0.6°C |
| Avg Low | 21.6°C | 21.6°C | 22.3°C | 21.9°C | 23.6°C | +2°C |
| Avg Rain | 175 mm | 147 mm | 167 mm | 203 mm | 193 mm | +18 mm |
September temperatures in Gopalganj have risen by about 1.2°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 16.3°C (1994) to a record high of 38.2°C (1983).
Rainfall in September is a relatively wet time of year, averaging 176 mm, with a wettest year of 365 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A good time to visit Gopalganj
September is a good time to visit Gopalganj, with days averaging 33.9°C and nights around 22.1°C (mean 28°C, warmer than Gopalganj'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 | 33.9°C | 24.6°C | 29.2°C | 176 mm | 86% | 1.6 m/s | 4.5 |
| 2024 | 36.4°C | 24.0°C | 30.2°C | 237 mm | 84% | 2 m/s | 4.4 |
| 2023 | 33.6°C | 24.1°C | 28.9°C | 102 mm | 87% | 2.1 m/s | 4.3 |
| 2022 | 33.3°C | 22.9°C | 28.1°C | 195 mm | 85% | 1.8 m/s | 3.8 |
| 2021 | 32.5°C | 24.4°C | 28.4°C | 151 mm | 89% | 2 m/s | 4.5 |
| 2020 | 33.5°C | 21.6°C | 27.5°C | 298 mm | 86% | 1.5 m/s | 4 |
| 2019 | 34.5°C | 21.1°C | 27.8°C | 285 mm | 86% | 2.2 m/s | 3.7 |
| 2018 | 34.3°C | 22.4°C | 28.3°C | 108 mm | 81% | 2.1 m/s | 4.8 |
| 2017 | 33.6°C | 24.3°C | 28.9°C | 94 mm | 85% | 1.5 m/s | 4.8 |
| 2016 | 35.0°C | 23.4°C | 29.2°C | 235 mm | 85% | 1.4 m/s | 3.8 |
| 2015 | 34.6°C | 19.0°C | 26.8°C | 89 mm | 80% | 1.5 m/s | 5.1 |
| 2014 | 34.1°C | 20.8°C | 27.5°C | 232 mm | 85% | 1.7 m/s | 4.6 |
| 2013 | 33.0°C | 22.7°C | 27.8°C | 240 mm | 83% | 1.5 m/s | 4.9 |
| 2012 | 33.3°C | 21.1°C | 27.2°C | 305 mm | 84% | 1.7 m/s | 4.6 |
| 2011 | 33.6°C | 22.5°C | 28.1°C | 245 mm | 86% | 2.1 m/s | 4.6 |
| 2010 | 32.9°C | 21.7°C | 27.3°C | 197 mm | 87% | 2.2 m/s | 4.4 |
| 2009 | 33.2°C | 23.6°C | 28.4°C | 100 mm | 85% | 1.8 m/s | 5.1 |
| 2008 | 32.5°C | 21.4°C | 27.0°C | 221 mm | 87% | 1.7 m/s | 5.1 |
| 2007 | 32.7°C | 22.1°C | 27.4°C | 306 mm | 88% | 2.1 m/s | 4.3 |
| 2006 | 33.3°C | 22.5°C | 27.9°C | 212 mm | 85% | 2 m/s | 4.7 |
| 2005 | 33.4°C | 22.9°C | 28.2°C | 83 mm | 86% | 2 m/s | 4.9 |
| 2004 | 34.1°C | 22.2°C | 28.1°C | 89 mm | 81% | 1.5 m/s | 4.8 |
| 2003 | 35.3°C | 22.8°C | 29.0°C | 120 mm | 79% | 2.2 m/s | 4.3 |
| 2002 | 37.1°C | 23.3°C | 30.2°C | 100 mm | 72% | 2.4 m/s | 4.6 |
| 2001 | 32.8°C | 21.4°C | 27.1°C | 229 mm | 84% | 1.5 m/s | 4.3 |
| 2000 | 32.6°C | 20.3°C | 26.5°C | 206 mm | 86% | 2.4 m/s | 4.2 |
| 1999 | 34.3°C | 23.0°C | 28.7°C | 75 mm | 80% | 2.4 m/s | 4.9 |
| 1998 | 33.1°C | 23.6°C | 28.4°C | 181 mm | 87% | 2.1 m/s | 5.1 |
| 1997 | 33.0°C | 21.5°C | 27.2°C | 125 mm | 83% | 1.6 m/s | 4.5 |
| 1996 | 33.0°C | 23.1°C | 28.1°C | 142 mm | 85% | 1.5 m/s | 5.4 |
| 1995 | 33.4°C | 22.1°C | 27.7°C | 152 mm | 84% | 2.1 m/s | 5 |
| 1994 | 34.3°C | 16.3°C | 25.3°C | 186 mm | 81% | 2.2 m/s | 4.9 |
| 1993 | 33.8°C | 22.4°C | 28.1°C | 224 mm | 86% | 2.4 m/s | 4.6 |
| 1992 | 35.9°C | 21.1°C | 28.5°C | 77 mm | 73% | 2 m/s | 5 |
| 1991 | 32.9°C | 21.2°C | 27.1°C | 190 mm | 82% | 1.5 m/s | 4.4 |
| 1990 | 33.9°C | 22.1°C | 28.0°C | 124 mm | 86% | 2.1 m/s | 4.3 |
| 1989 | 36.8°C | 23.3°C | 30.0°C | 116 mm | 76% | 2.1 m/s | 4.4 |
| 1988 | 33.7°C | 22.3°C | 28.0°C | 123 mm | 85% | 1.8 m/s | 4.9 |
| 1987 🌧️ | 33.3°C | 21.4°C | 27.3°C | 365 mm | 88% | 1.8 m/s | 4.3 |
| 1986 | 34.9°C | 21.1°C | 28.0°C | 78 mm | 78% | 2.4 m/s | 5 |
| 1985 | 33.3°C | 21.9°C | 27.6°C | 271 mm | 88% | 1.9 m/s | 4.4 |
| 1984 ❄️ | 31.5°C | 18.2°C | 24.8°C | 249 mm | 86% | 2 m/s | 4.8 |
| 1983 🔥 | 38.2°C | 24.4°C | 31.3°C | 47 mm | 69% | 2.6 m/s | — |
| 1982 | 35.4°C | 19.3°C | 27.4°C | 145 mm | 82% | 1.9 m/s | — |
| 1981 | 33.3°C | 22.8°C | 28.1°C | 185 mm | 87% | 2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 33.9°C with lows near 22.1°C (mean 28°C), based on 45 years of NASA POWER data.
September averages 176 mm of rainfall in Gopalganj, a relatively wet time of year. The wettest on record was 365 mm in 1987.
The hottest September reached 38.2°C in 1983. The coldest dipped to 16.3°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.2°C. Daytime highs moved from 34.3°C to 33.9°C and overnight lows from 21.3°C to 24°C over the same span.
September is one of the warmer months of the year in Gopalganj and a relatively wet time of year, so plan for around 33.9°C daytime highs and 22.1°C at night.
Not quite — September is the 7th coolest month in Gopalganj, averaging 28°C.
For September in Gopalganj, pack light, breathable clothing and sun protection, with typical highs of 33.9°C and lows of 22.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 83% — quite humid.
Average wind speed in September is 1.9 m/s. The windiest September on record averaged 2.6 m/s (1983).
The wettest September on record was 1987 with 365 mm. On average, September sees 176 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 Gopalganj 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.
