September is one of the warmer months of the year in Dhemaji, with average highs near 28.9°C and lows around 22.5°C (mean 25.7°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 27.9°C — while the coldest was 1984 at 24°C. Typical September days reach 28.9°C with nights near 22.5°C. The long-term trend is warming, about 0.4°C per decade.
September is a relatively wet time of year in Dhemaji, averaging 328 mm of rainfall. The wettest September on record was 1990 with 571 mm, while the driest was 1998 at 125 mm.
Relative humidity in Dhemaji during September averages 84%. The most humid September was 2020 at 89%, and the least humid was 2005 at 77%.
September receives about 4 kWh/m²/day of solar energy in Dhemaji. The sunniest Septembers were 1998, 2009 and 2021 at 5 kWh/m²/day, and the cloudiest was 1991 at 3.
Average wind speed in Dhemaji during September is 0.8 m/s. The windiest September was 2012 at 1.3 m/s, while the calmest was 1999 at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.0°C | 25.5°C | 25.8°C | 25.9°C | 26.8°C | +1.8°C |
| Avg High | 28.1°C | 28.7°C | 29.2°C | 28.7°C | 30.1°C | +2°C |
| Avg Low | 21.9°C | 22.2°C | 22.4°C | 23.0°C | 23.6°C | +1.7°C |
| Avg Rain | 342 mm | 331 mm | 265 mm | 400 mm | 287 mm | -55 mm |
September temperatures in Dhemaji have risen by about 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.
A quieter season to visit Dhemaji
If your dates are flexible, the more temperate months of November and March tend to be the most comfortable for visiting Dhemaji. That said, September — with days averaging 28.9°C and nights around 22.5°C (mean 25.7°C) and higher rainfall (328 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 29.8°C | 26.9°C | 24.0°C | 34.0°C | 23.0°C | 308 mm | 85% | 0.8 m/s | 4.4 |
| 2024 🔥 | 31.3°C | 27.9°C | 24.5°C | 37.5°C | 22.0°C | 255 mm | 80% | 0.7 m/s | 4.9 |
| 2023 | 31.2°C | 27.3°C | 23.4°C | 34.2°C | 22.1°C | 178 mm | 77% | 0.7 m/s | 4.7 |
| 2022 | 29.0°C | 25.9°C | 22.9°C | 31.9°C | 20.7°C | 313 mm | 86% | 0.8 m/s | 3.7 |
| 2021 | 30.2°C | 26.7°C | 23.3°C | 32.8°C | 22.4°C | 171 mm | 82% | 0.8 m/s | 5 |
| 2020 | 29.0°C | 26.2°C | 23.5°C | 32.5°C | 22.1°C | 499 mm | 89% | 1 m/s | 3.3 |
| 2019 | 28.6°C | 25.8°C | 23.1°C | 33.5°C | 19.2°C | 446 mm | 87% | 0.8 m/s | 3.6 |
| 2018 | 28.5°C | 25.9°C | 23.3°C | 33.3°C | 21.5°C | 409 mm | 87% | 0.8 m/s | 3.4 |
| 2017 | 28.8°C | 26.1°C | 23.4°C | 33.0°C | 21.9°C | 362 mm | 88% | 0.9 m/s | 3.7 |
| 2016 | 28.8°C | 26.0°C | 23.2°C | 31.9°C | 20.1°C | 465 mm | 87% | 0.9 m/s | 3.6 |
| 2015 | 28.5°C | 25.7°C | 22.9°C | 31.0°C | 21.7°C | 284 mm | 88% | 0.9 m/s | 4 |
| 2014 | 28.9°C | 25.9°C | 23.0°C | 33.3°C | 21.1°C | 412 mm | 85% | 0.8 m/s | 4 |
| 2013 | 29.2°C | 26.1°C | 23.0°C | 31.8°C | 20.9°C | 220 mm | 84% | 0.9 m/s | 4.5 |
| 2012 | 28.1°C | 25.5°C | 23.0°C | 33.1°C | 20.4°C | 506 mm | 89% | 1.3 m/s | 3.5 |
| 2011 | 29.4°C | 26.1°C | 22.8°C | 32.4°C | 19.9°C | 363 mm | 82% | 0.8 m/s | 4.7 |
| 2010 | 28.5°C | 25.5°C | 22.5°C | 31.2°C | 19.4°C | 532 mm | 84% | 0.8 m/s | 3.8 |
| 2009 | 29.9°C | 26.2°C | 22.6°C | 32.3°C | 20.9°C | 182 mm | 80% | 0.8 m/s | 5 |
| 2008 | 29.3°C | 25.9°C | 22.4°C | 31.2°C | 21.3°C | 242 mm | 81% | 0.8 m/s | 4.5 |
| 2007 | 28.9°C | 25.4°C | 21.8°C | 32.2°C | 18.9°C | 382 mm | 80% | 0.9 m/s | 4.2 |
| 2006 | 29.1°C | 25.7°C | 22.3°C | 33.5°C | 20.8°C | 257 mm | 81% | 0.8 m/s | 4.2 |
| 2005 | 30.6°C | 26.8°C | 22.9°C | 33.4°C | 21.8°C | 150 mm | 77% | 0.8 m/s | 4.8 |
| 2004 | 28.5°C | 25.3°C | 22.1°C | 31.0°C | 20.1°C | 184 mm | 83% | 0.8 m/s | 3.9 |
| 2003 | 29.0°C | 25.9°C | 22.8°C | 30.8°C | 21.7°C | 311 mm | 83% | 0.8 m/s | 3.8 |
| 2002 | 29.3°C | 25.7°C | 22.1°C | 33.2°C | 20.0°C | 268 mm | 80% | 0.9 m/s | 4.3 |
| 2001 | 28.9°C | 25.7°C | 22.6°C | 31.1°C | 21.4°C | 250 mm | 83% | 0.7 m/s | 4.1 |
| 2000 | 28.4°C | 25.2°C | 22.0°C | 34.0°C | 19.5°C | 426 mm | 84% | 0.8 m/s | 3.8 |
| 1999 | 29.4°C | 26.2°C | 22.9°C | 31.9°C | 21.8°C | 285 mm | 81% | 0.6 m/s | 4.3 |
| 1998 | 30.1°C | 26.4°C | 22.8°C | 32.2°C | 21.1°C | 125 mm | 78% | 0.7 m/s | 5 |
| 1997 | 27.4°C | 24.3°C | 21.2°C | 32.4°C | 17.1°C | 249 mm | 85% | 0.9 m/s | 3.6 |
| 1996 | 29.1°C | 25.7°C | 22.3°C | 33.5°C | 21.0°C | 167 mm | 82% | 0.8 m/s | 4.1 |
| 1995 | 27.9°C | 24.9°C | 21.9°C | 33.8°C | 19.1°C | 437 mm | 84% | 0.9 m/s | 4.1 |
| 1994 | 29.8°C | 26.3°C | 22.7°C | 33.2°C | 19.4°C | 325 mm | 80% | 0.7 m/s | 4.4 |
| 1993 | 28.4°C | 25.1°C | 21.8°C | 32.4°C | 20.1°C | 407 mm | 83% | 0.8 m/s | 4 |
| 1992 | 28.9°C | 25.4°C | 21.9°C | 32.9°C | 19.3°C | 231 mm | 80% | 0.7 m/s | 3.9 |
| 1991 | 28.0°C | 25.1°C | 22.2°C | 30.9°C | 20.8°C | 515 mm | 86% | 0.8 m/s | 3 |
| 1990 🌧️ | 28.2°C | 25.2°C | 22.2°C | 33.8°C | 18.6°C | 571 mm | 85% | 0.9 m/s | 3.1 |
| 1989 | 28.1°C | 25.1°C | 22.2°C | 30.4°C | 20.3°C | 359 mm | 87% | 0.9 m/s | 3.7 |
| 1988 | 28.7°C | 25.5°C | 22.4°C | 31.6°C | 21.0°C | 343 mm | 86% | 1 m/s | 3.2 |
| 1987 | 28.0°C | 25.1°C | 22.2°C | 30.1°C | 18.8°C | 490 mm | 86% | 0.8 m/s | 3.4 |
| 1986 | 27.7°C | 24.6°C | 21.5°C | 31.4°C | 18.9°C | 310 mm | 84% | 0.9 m/s | 3.5 |
| 1985 | 27.8°C | 24.9°C | 21.9°C | 32.6°C | 20.4°C | 315 mm | 87% | 0.9 m/s | 4 |
| 1984 ❄️ | 27.1°C | 24.0°C | 20.8°C | 31.7°C | 18.1°C | 335 mm | 85% | 0.9 m/s | 3.5 |
| 1983 | 28.5°C | 25.4°C | 22.3°C | 32.1°C | 18.6°C | 426 mm | 85% | 0.9 m/s | — |
| 1982 | 28.6°C | 25.2°C | 21.9°C | 33.9°C | 20.0°C | 245 mm | 83% | 1 m/s | — |
| 1981 | 28.2°C | 25.1°C | 22.1°C | 31.2°C | 20.2°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 28.9°C with lows near 22.5°C (mean 25.7°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°C. Daytime highs moved from 28°C to 30.3°C and overnight lows from 21.8°C to 23.6°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 28.9°C daytime highs and 22.5°C at night.
Not quite — September is the 9th coolest month in Dhemaji, averaging 25.7°C.
For September in Dhemaji, pack light layers you can adjust through the day, with typical highs of 28.9°C and lows of 22.5°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.
