September is one of the warmer months of the year in Dima Hasao, with average highs near 34.1°C and lows around 20.5°C (mean 27.3°C). It is a relatively wet time of year, averaging 187 mm of rainfall and 85% relative humidity across the period.
September is one of the warmer months of the year in Dima Hasao. Across 45 years of records, the warmest September in Dima Hasao was 2023 — when the month averaged 28.9°C — while the coldest was 2007 at 25°C. Typical September days reach 34.1°C with nights near 20.5°C. The long-term trend is warming, about 0.3°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.8°C | 27.2°C | 27.2°C | 27.4°C | 28.1°C | +1.3°C |
| Avg High | 33.6°C | 34.5°C | 34.0°C | 33.8°C | 34.7°C | +1.1°C |
| Avg Low | 19.9°C | 19.9°C | 20.4°C | 21.1°C | 21.6°C | +1.7°C |
| Avg Rain | 170 mm | 162 mm | 155 mm | 248 mm | 205 mm | +35 mm |
September temperatures in Dima Hasao have risen by about 1.7°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 17.1°C (1997) to a record high of 37.1°C (1990).
Rainfall in September is a relatively wet time of year, averaging 187 mm, with a wettest year of 314 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.1°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
A good time to visit Dima Hasao
September is a good time to visit Dima Hasao, with days averaging 34.1°C and nights around 20.5°C (mean 27.3°C, warmer than Dima Hasao's yearly average) and higher rainfall. March and November are marginally more temperate, but September still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 34.1°C | 21.9°C | 28.0°C | 245 mm | 87% | 0.1 m/s | 4.6 |
| 2024 | 35.2°C | 21.3°C | 28.3°C | 200 mm | 84% | 0.1 m/s | 4.6 |
| 2023 🔥 | 36.4°C | 21.5°C | 28.9°C | 136 mm | 82% | 0.1 m/s | 4.9 |
| 2022 | 33.4°C | 21.2°C | 27.3°C | 215 mm | 87% | 0.1 m/s | 4.7 |
| 2021 | 35.4°C | 21.5°C | 28.4°C | 120 mm | 84% | 0.1 m/s | 5 |
| 2020 🌧️ | 33.6°C | 22.0°C | 27.8°C | 314 mm | 88% | 0.1 m/s | 4.2 |
| 2019 | 33.7°C | 19.9°C | 26.8°C | 273 mm | 88% | 0.1 m/s | 4.4 |
| 2018 | 33.3°C | 21.8°C | 27.6°C | 188 mm | 86% | 0.1 m/s | 4.7 |
| 2017 | 34.5°C | 22.0°C | 28.2°C | 313 mm | 88% | 0.1 m/s | 4.2 |
| 2016 | 33.1°C | 22.1°C | 27.6°C | 299 mm | 89% | 0.1 m/s | 4.5 |
| 2015 | 32.5°C | 21.0°C | 26.7°C | 258 mm | 88% | 0.1 m/s | 4.4 |
| 2014 | 33.3°C | 19.0°C | 26.1°C | 247 mm | 86% | 0.1 m/s | 4.4 |
| 2013 | 32.7°C | 21.1°C | 26.9°C | 255 mm | 89% | 0.1 m/s | 4.4 |
| 2012 | 35.4°C | 22.0°C | 28.7°C | 216 mm | 89% | 0.1 m/s | 4.1 |
| 2011 | 33.5°C | 21.1°C | 27.3°C | 182 mm | 86% | 0.1 m/s | 4.5 |
| 2010 | 35.9°C | 21.4°C | 28.6°C | 249 mm | 89% | 0.1 m/s | 4 |
| 2009 | 33.7°C | 21.0°C | 27.3°C | 139 mm | 84% | 0.1 m/s | 4.5 |
| 2008 | 32.8°C | 20.3°C | 26.5°C | 109 mm | 86% | 0.1 m/s | 4.5 |
| 2007 ❄️ | 32.2°C | 17.8°C | 25.0°C | 216 mm | 84% | 0.1 m/s | 4.3 |
| 2006 | 36.0°C | 20.8°C | 28.4°C | 125 mm | 80% | 0.1 m/s | 4.5 |
| 2005 | 35.6°C | 21.0°C | 28.3°C | 233 mm | 82% | 0.1 m/s | 4.4 |
| 2004 | 33.2°C | 20.4°C | 26.8°C | 142 mm | 86% | 0.1 m/s | 3.7 |
| 2003 | 34.5°C | 21.8°C | 28.1°C | 216 mm | 83% | 0.1 m/s | 4.4 |
| 2002 | 33.3°C | 19.5°C | 26.4°C | 138 mm | 83% | 0.1 m/s | 4.7 |
| 2001 | 33.7°C | 21.4°C | 27.5°C | 98 mm | 83% | 0.1 m/s | 4.4 |
| 2000 | 35.3°C | 20.2°C | 27.8°C | 133 mm | 84% | 0.1 m/s | 3.9 |
| 1999 | 33.7°C | 21.4°C | 27.5°C | 134 mm | 86% | 0.1 m/s | 4.5 |
| 1998 | 35.0°C | 20.6°C | 27.8°C | 98 mm | 83% | 0.1 m/s | 4.9 |
| 1997 | 34.2°C | 17.1°C | 25.7°C | 291 mm | 86% | 0.1 m/s | 4.3 |
| 1996 | 34.6°C | 20.9°C | 27.8°C | 134 mm | 82% | 0.1 m/s | 4.9 |
| 1995 | 32.9°C | 20.8°C | 26.9°C | 195 mm | 88% | 0.1 m/s | 4.6 |
| 1994 | 35.9°C | 18.3°C | 27.1°C | 62 mm | 78% | 0.1 m/s | 5.3 |
| 1993 | 33.2°C | 20.1°C | 26.7°C | 158 mm | 85% | 0.1 m/s | 4.1 |
| 1992 | 36.6°C | 20.2°C | 28.4°C | 93 mm | 77% | 0.1 m/s | 4.8 |
| 1991 | 31.7°C | 20.1°C | 25.9°C | 258 mm | 86% | 0.1 m/s | 4 |
| 1990 | 37.1°C | 19.1°C | 28.1°C | 200 mm | 84% | 0.1 m/s | 4 |
| 1989 | 36.6°C | 20.6°C | 28.6°C | 160 mm | 82% | 0.1 m/s | 4.8 |
| 1988 | 33.3°C | 20.9°C | 27.1°C | 150 mm | 87% | 0.1 m/s | 4.4 |
| 1987 | 32.1°C | 19.7°C | 25.9°C | 251 mm | 86% | 0.1 m/s | 3.9 |
| 1986 | 35.5°C | 18.7°C | 27.1°C | 134 mm | 81% | 0.1 m/s | 4.2 |
| 1985 | 33.5°C | 20.0°C | 26.8°C | 183 mm | 84% | 0.1 m/s | 4.9 |
| 1984 | 33.4°C | 18.7°C | 26.1°C | 164 mm | 84% | 0.1 m/s | 4.2 |
| 1983 | 31.6°C | 20.7°C | 26.2°C | 175 mm | 85% | 0.1 m/s | — |
| 1982 | 33.8°C | 20.0°C | 26.9°C | 168 mm | 84% | 0.1 m/s | — |
| 1981 | 33.0°C | 20.1°C | 26.6°C | 143 mm | 85% | 0.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 34.1°C with lows near 20.5°C (mean 27.3°C), based on 45 years of NASA POWER data.
September averages 187 mm of rainfall in Dima Hasao, a relatively wet time of year. The wettest on record was 314 mm in 2020.
The hottest September reached 37.1°C in 1990. 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 1.7°C. Daytime highs moved from 33.1°C to 34.9°C and overnight lows from 19.9°C to 21.5°C over the same span.
September is one of the warmer months of the year in Dima Hasao and a relatively wet time of year, so plan for around 34.1°C daytime highs and 20.5°C at night.
Not quite — September is the 8th coolest month in Dima Hasao, averaging 27.3°C.
For September in Dima Hasao, pack light, breathable clothing and sun protection, with typical highs of 34.1°C and lows of 20.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 85% — quite humid.
Average wind speed in September is 0.1 m/s. The windiest September on record averaged 0.1 m/s (1981).
The wettest September on record was 2020 with 314 mm. On average, September sees 187 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 Dima Hasao 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.
