September is one of the warmer months of the year in Dumka, with average highs near 30.8°C and lows around 24.6°C (mean 27.7°C). It is a relatively wet time of year, averaging 197 mm of rainfall and 86% relative humidity across the period.
September is one of the warmer months of the year in Dumka. Across 45 years of records, the warmest September in Dumka was 1992 — when the month averaged 29.5°C — while the coldest was 1984 at 26.5°C. Typical September days reach 30.8°C with nights near 24.6°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Dumka, averaging 197 mm of rainfall. The wettest September on record was 2024 with 347 mm, while the driest was 1996 at 64 mm.
Relative humidity in Dumka during September averages 86%. The most humid September was 1999 at 92%, and the least humid was 1992 at 71%.
September receives about 4.4 kWh/m²/day of solar energy in Dumka. The sunniest Septembers were 1988, 1992 and 2015, among others at 4.9 kWh/m²/day, and the cloudiest were 1991 and 2019 at 3.8.
Average wind speed in Dumka during September is 1.9 m/s. The windiest September was 2011 at 2.5 m/s, while the calmest were 2001 and 2025 at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.8°C | 27.8°C | 27.4°C | 27.7°C | 27.9°C | +0.1°C |
| Avg High | 31.3°C | 31.1°C | 30.3°C | 30.7°C | 30.6°C | -0.7°C |
| Avg Low | 24.3°C | 24.4°C | 24.5°C | 24.7°C | 25.2°C | +0.9°C |
| Avg Rain | 151 mm | 157 mm | 230 mm | 213 mm | 253 mm | +102 mm |
September temperatures in Dumka have risen by about 0.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 18.8°C (1984) to a record high of 38°C (1992).
Rainfall in September is a relatively wet time of year, averaging 197 mm, with a wettest year of 347 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.2°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Dumka
September is a good time to visit Dumka, with days averaging 30.8°C and nights around 24.6°C (mean 27.7°C, warmer than Dumka'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 | 30.8°C | 27.9°C | 25.0°C | 32.3°C | 24.0°C | 166 mm | 88% | 1.4 m/s | 4.4 |
| 2024 🌧️ | 30.9°C | 28.2°C | 25.6°C | 33.4°C | 24.4°C | 347 mm | 89% | 2.1 m/s | 4.4 |
| 2023 | 30.5°C | 28.0°C | 25.5°C | 33.4°C | 24.4°C | 335 mm | 89% | 1.8 m/s | 4.1 |
| 2022 | 30.8°C | 28.0°C | 25.2°C | 32.9°C | 23.8°C | 200 mm | 88% | 1.7 m/s | 4 |
| 2021 | 30.3°C | 27.6°C | 24.8°C | 32.6°C | 23.6°C | 191 mm | 89% | 1.9 m/s | 4.2 |
| 2020 | 30.5°C | 27.9°C | 25.3°C | 32.9°C | 23.2°C | 280 mm | 90% | 1.6 m/s | 4 |
| 2019 | 30.5°C | 27.8°C | 25.1°C | 32.7°C | 22.3°C | 340 mm | 88% | 1.9 m/s | 3.8 |
| 2018 | 31.0°C | 27.8°C | 24.6°C | 32.4°C | 22.7°C | 140 mm | 86% | 1.7 m/s | 4.5 |
| 2017 | 30.8°C | 28.0°C | 25.2°C | 33.0°C | 24.2°C | 174 mm | 89% | 1.5 m/s | 4.3 |
| 2016 | 30.6°C | 27.7°C | 24.9°C | 31.8°C | 24.0°C | 320 mm | 89% | 1.5 m/s | 4.3 |
| 2015 | 31.7°C | 28.1°C | 24.4°C | 33.3°C | 22.0°C | 173 mm | 83% | 1.5 m/s | 4.9 |
| 2014 | 30.8°C | 27.7°C | 24.6°C | 33.1°C | 22.4°C | 168 mm | 86% | 1.6 m/s | 4.6 |
| 2013 | 30.8°C | 27.8°C | 24.7°C | 32.8°C | 23.7°C | 159 mm | 86% | 1.6 m/s | 4.6 |
| 2012 | 30.1°C | 27.1°C | 24.1°C | 32.5°C | 20.4°C | 200 mm | 88% | 1.8 m/s | 4.4 |
| 2011 | 29.9°C | 27.3°C | 24.7°C | 31.7°C | 21.8°C | 251 mm | 90% | 2.5 m/s | 4.2 |
| 2010 | 30.7°C | 27.6°C | 24.4°C | 33.1°C | 22.1°C | 206 mm | 86% | 1.7 m/s | 4.5 |
| 2009 | 30.4°C | 27.5°C | 24.6°C | 32.7°C | 23.7°C | 221 mm | 89% | 1.8 m/s | 4.6 |
| 2008 | 30.4°C | 27.4°C | 24.4°C | 32.8°C | 22.4°C | 186 mm | 87% | 1.6 m/s | 4.3 |
| 2007 | 29.8°C | 27.3°C | 24.7°C | 31.6°C | 23.4°C | 312 mm | 90% | 2.1 m/s | 4.2 |
| 2006 | 30.1°C | 27.3°C | 24.4°C | 32.5°C | 23.5°C | 313 mm | 88% | 2.1 m/s | 4.3 |
| 2005 | 30.8°C | 27.7°C | 24.7°C | 32.8°C | 23.3°C | 142 mm | 87% | 1.7 m/s | 4.8 |
| 2004 | 29.6°C | 26.9°C | 24.3°C | 32.4°C | 22.5°C | 212 mm | 90% | 2.4 m/s | 4 |
| 2003 | 31.1°C | 28.1°C | 25.1°C | 33.1°C | 23.7°C | 161 mm | 87% | 1.9 m/s | 4.4 |
| 2002 | 30.1°C | 27.1°C | 24.0°C | 32.5°C | 22.3°C | 244 mm | 88% | 1.9 m/s | 4.6 |
| 2001 | 30.6°C | 27.6°C | 24.5°C | 32.0°C | 23.0°C | 232 mm | 87% | 1.4 m/s | 4.4 |
| 2000 | 29.9°C | 27.1°C | 24.2°C | 32.1°C | 20.8°C | 282 mm | 88% | 2.1 m/s | 4 |
| 1999 | 29.1°C | 26.8°C | 24.6°C | 31.0°C | 23.3°C | 170 mm | 92% | 2.3 m/s | 4.1 |
| 1998 | 30.2°C | 27.4°C | 24.7°C | 32.8°C | 23.7°C | 221 mm | 90% | 1.8 m/s | 4.3 |
| 1997 | 30.2°C | 27.1°C | 24.0°C | 32.1°C | 19.9°C | 181 mm | 88% | 1.8 m/s | 4.4 |
| 1996 | 32.1°C | 28.3°C | 24.6°C | 34.4°C | 23.7°C | 64 mm | 81% | 1.6 m/s | 4.5 |
| 1995 | 30.5°C | 27.6°C | 24.7°C | 33.6°C | 22.6°C | 179 mm | 87% | 2.3 m/s | 4.1 |
| 1994 | 32.6°C | 28.1°C | 23.5°C | 34.8°C | 19.2°C | 72 mm | 76% | 2.3 m/s | 4.7 |
| 1993 | 30.8°C | 27.6°C | 24.4°C | 34.2°C | 23.3°C | 145 mm | 84% | 2.2 m/s | 3.9 |
| 1992 🔥 | 34.5°C | 29.5°C | 24.6°C | 38.0°C | 22.3°C | 72 mm | 71% | 2.3 m/s | 4.9 |
| 1991 | 30.2°C | 27.3°C | 24.5°C | 33.1°C | 22.7°C | 258 mm | 88% | 1.8 m/s | 3.8 |
| 1990 | 30.9°C | 27.8°C | 24.7°C | 34.0°C | 23.4°C | 204 mm | 86% | 2 m/s | 4.3 |
| 1989 | 32.1°C | 28.5°C | 25.0°C | 36.9°C | 23.6°C | 179 mm | 82% | 2.1 m/s | 4.3 |
| 1988 | 31.8°C | 28.4°C | 24.9°C | 34.6°C | 23.2°C | 88 mm | 84% | 1.6 m/s | 4.9 |
| 1987 | 30.9°C | 27.9°C | 24.8°C | 32.6°C | 21.8°C | 179 mm | 88% | 1.9 m/s | 4.4 |
| 1986 | 31.5°C | 27.8°C | 24.1°C | 35.7°C | 22.4°C | 179 mm | 80% | 2.4 m/s | 4.1 |
| 1985 | 31.7°C | 28.0°C | 24.3°C | 34.8°C | 22.2°C | 136 mm | 82% | 1.8 m/s | 4.9 |
| 1984 ❄️ | 30.0°C | 26.5°C | 23.0°C | 31.6°C | 18.8°C | 143 mm | 85% | 1.7 m/s | 4.7 |
| 1983 | 32.2°C | 28.6°C | 24.9°C | 34.9°C | 23.4°C | 106 mm | 81% | 2.2 m/s | — |
| 1982 | 31.5°C | 27.5°C | 23.5°C | 33.1°C | 19.4°C | 104 mm | 83% | 1.9 m/s | — |
| 1981 | 30.0°C | 27.3°C | 24.6°C | 32.7°C | 22.4°C | 245 mm | 89% | 1.7 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 30.8°C with lows near 24.6°C (mean 27.7°C), based on 45 years of NASA POWER data.
September averages 197 mm of rainfall in Dumka, a relatively wet time of year. The wettest on record was 347 mm in 2024.
The hottest September reached 38°C in 1992. The coldest dipped to 18.8°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.3°C — but days and nights have moved in opposite directions. Overnight lows rose from 24.1°C to 25.2°C while daytime highs eased from 31.1°C to 30.7°C, narrowing the gap between day and night.
September is one of the warmer months of the year in Dumka and a relatively wet time of year, so plan for around 30.8°C daytime highs and 24.6°C at night.
Not quite — September is the 7th coolest month in Dumka, averaging 27.7°C.
For September in Dumka, pack light, breathable clothing and sun protection, with typical highs of 30.8°C and lows of 24.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 86% — quite humid.
Average wind speed in September is 1.9 m/s. The windiest September on record averaged 2.5 m/s (2011).
The wettest September on record was 2024 with 347 mm. On average, September sees 197 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 Dumka 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.
