September is one of the warmer months of the year in Dhemaji, with average highs near 32.5°C and lows around 20.4°C (mean 26.5°C). It is a relatively wet time of year, averaging 328 mm of rainfall and 84% relative humidity across the period.
September is one of the warmer months of the year in Dhemaji. Across 45 years of records, the warmest September in Dhemaji was 2024 — when the month averaged 29.8°C — while the coldest was 1987 at 24.4°C. Typical September days reach 32.5°C with nights near 20.4°C. The long-term trend is warming, about 0.5°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.6°C | 26.2°C | 26.4°C | 26.6°C | 27.9°C | +2.3°C |
| Avg High | 31.7°C | 32.7°C | 32.3°C | 32.5°C | 33.8°C | +2.1°C |
| Avg Low | 19.6°C | 19.8°C | 20.6°C | 20.6°C | 22.1°C | +2.5°C |
| Avg Rain | 342 mm | 331 mm | 265 mm | 400 mm | 287 mm | -55 mm |
September temperatures in Dhemaji have risen by about 2.2°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 17.1°C (1997) to a record high of 37.5°C (2024).
Rainfall in September is a relatively wet time of year, averaging 328 mm, with a wettest year of 571 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.6°C per decade, narrowing the gap between day and night.
A quieter season to visit Dhemaji
If your dates are flexible, the more temperate months of March and November tend to be the most comfortable for visiting Dhemaji. That said, September — with days averaging 32.5°C and nights around 20.4°C (mean 26.5°C) and higher rainfall (328 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 34.0°C | 23.0°C | 28.5°C | 308 mm | 85% | 0.8 m/s | 4.4 |
| 2024 🔥 | 37.5°C | 22.0°C | 29.8°C | 255 mm | 80% | 0.7 m/s | 4.9 |
| 2023 | 34.2°C | 22.1°C | 28.1°C | 178 mm | 77% | 0.7 m/s | 4.7 |
| 2022 | 31.9°C | 20.7°C | 26.3°C | 313 mm | 86% | 0.8 m/s | 3.7 |
| 2021 | 32.8°C | 22.4°C | 27.6°C | 171 mm | 82% | 0.8 m/s | 5 |
| 2020 | 32.5°C | 22.1°C | 27.3°C | 499 mm | 89% | 1 m/s | 3.3 |
| 2019 | 33.5°C | 19.2°C | 26.4°C | 446 mm | 87% | 0.8 m/s | 3.6 |
| 2018 | 33.3°C | 21.5°C | 27.4°C | 409 mm | 87% | 0.8 m/s | 3.4 |
| 2017 | 33.0°C | 21.9°C | 27.5°C | 362 mm | 88% | 0.9 m/s | 3.7 |
| 2016 | 31.9°C | 20.1°C | 26.0°C | 465 mm | 87% | 0.9 m/s | 3.6 |
| 2015 | 31.0°C | 21.7°C | 26.3°C | 284 mm | 88% | 0.9 m/s | 4 |
| 2014 | 33.3°C | 21.1°C | 27.2°C | 412 mm | 85% | 0.8 m/s | 4 |
| 2013 | 31.8°C | 20.9°C | 26.4°C | 220 mm | 84% | 0.9 m/s | 4.5 |
| 2012 | 33.1°C | 20.4°C | 26.8°C | 506 mm | 89% | 1.3 m/s | 3.5 |
| 2011 | 32.4°C | 19.9°C | 26.2°C | 363 mm | 82% | 0.8 m/s | 4.7 |
| 2010 | 31.2°C | 19.4°C | 25.3°C | 532 mm | 84% | 0.8 m/s | 3.8 |
| 2009 | 32.3°C | 20.9°C | 26.6°C | 182 mm | 80% | 0.8 m/s | 5 |
| 2008 | 31.2°C | 21.3°C | 26.3°C | 242 mm | 81% | 0.8 m/s | 4.5 |
| 2007 | 32.2°C | 18.9°C | 25.6°C | 382 mm | 80% | 0.9 m/s | 4.2 |
| 2006 | 33.5°C | 20.8°C | 27.1°C | 257 mm | 81% | 0.8 m/s | 4.2 |
| 2005 | 33.4°C | 21.8°C | 27.6°C | 150 mm | 77% | 0.8 m/s | 4.8 |
| 2004 | 31.0°C | 20.1°C | 25.5°C | 184 mm | 83% | 0.8 m/s | 3.9 |
| 2003 | 30.8°C | 21.7°C | 26.2°C | 311 mm | 83% | 0.8 m/s | 3.8 |
| 2002 | 33.2°C | 20.0°C | 26.6°C | 268 mm | 80% | 0.9 m/s | 4.3 |
| 2001 | 31.1°C | 21.4°C | 26.2°C | 250 mm | 83% | 0.7 m/s | 4.1 |
| 2000 | 34.0°C | 19.5°C | 26.7°C | 426 mm | 84% | 0.8 m/s | 3.8 |
| 1999 | 31.9°C | 21.8°C | 26.8°C | 285 mm | 81% | 0.6 m/s | 4.3 |
| 1998 | 32.2°C | 21.1°C | 26.6°C | 125 mm | 78% | 0.7 m/s | 5 |
| 1997 | 32.4°C | 17.1°C | 24.8°C | 249 mm | 85% | 0.9 m/s | 3.6 |
| 1996 | 33.5°C | 21.0°C | 27.2°C | 167 mm | 82% | 0.8 m/s | 4.1 |
| 1995 | 33.8°C | 19.1°C | 26.4°C | 437 mm | 84% | 0.9 m/s | 4.1 |
| 1994 | 33.2°C | 19.4°C | 26.3°C | 325 mm | 80% | 0.7 m/s | 4.4 |
| 1993 | 32.4°C | 20.1°C | 26.2°C | 407 mm | 83% | 0.8 m/s | 4 |
| 1992 | 32.9°C | 19.3°C | 26.1°C | 231 mm | 80% | 0.7 m/s | 3.9 |
| 1991 | 30.9°C | 20.8°C | 25.8°C | 515 mm | 86% | 0.8 m/s | 3 |
| 1990 🌧️ | 33.8°C | 18.6°C | 26.2°C | 571 mm | 85% | 0.9 m/s | 3.1 |
| 1989 | 30.4°C | 20.3°C | 25.4°C | 359 mm | 87% | 0.9 m/s | 3.7 |
| 1988 | 31.6°C | 21.0°C | 26.3°C | 343 mm | 86% | 1 m/s | 3.2 |
| 1987 ❄️ | 30.1°C | 18.8°C | 24.4°C | 490 mm | 86% | 0.8 m/s | 3.4 |
| 1986 | 31.4°C | 18.9°C | 25.2°C | 310 mm | 84% | 0.9 m/s | 3.5 |
| 1985 | 32.6°C | 20.4°C | 26.5°C | 315 mm | 87% | 0.9 m/s | 4 |
| 1984 | 31.7°C | 18.1°C | 24.9°C | 335 mm | 85% | 0.9 m/s | 3.5 |
| 1983 | 32.1°C | 18.6°C | 25.3°C | 426 mm | 85% | 0.9 m/s | — |
| 1982 | 33.9°C | 20.0°C | 26.9°C | 245 mm | 83% | 1 m/s | — |
| 1981 | 31.2°C | 20.2°C | 25.7°C | 256 mm | 85% | 0.8 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 32.5°C with lows near 20.4°C (mean 26.5°C), based on 45 years of NASA POWER data.
September averages 328 mm of rainfall in Dhemaji, a relatively wet time of year. The wettest on record was 571 mm in 1990.
The hottest September reached 37.5°C in 2024. The coldest dipped to 17.1°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2.2°C. Daytime highs moved from 32.3°C to 34.1°C and overnight lows from 19.5°C to 22°C over the same span.
September is one of the warmer months of the year in Dhemaji and a relatively wet time of year, so plan for around 32.5°C daytime highs and 20.4°C at night.
Not quite — September is the 9th coolest month in Dhemaji, averaging 26.5°C.
For September in Dhemaji, pack light, breathable clothing and sun protection, with typical highs of 32.5°C and lows of 20.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 84% — quite humid.
Average wind speed in September is 0.8 m/s. The windiest September on record averaged 1.3 m/s (2012).
The wettest September on record was 1990 with 571 mm. On average, September sees 328 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 Dhemaji 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.
