September is one of the warmer months of the year in East Kameng, with average highs near 25.6°C and lows around 13.7°C (mean 19.7°C). It is a relatively wet time of year, averaging 267 mm of rainfall and 88% relative humidity across the period.
September is one of the warmer months of the year in East Kameng. Across 45 years of records, the warmest September in East Kameng was 2024 — when the month averaged 21.6°C — while the coldest was 1987 at 17.9°C. Typical September days reach 25.6°C with nights near 13.7°C. The long-term trend is warming, about 0.4°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.2°C | 19.4°C | 19.3°C | 19.9°C | 20.9°C | +1.7°C |
| Avg High | 25.2°C | 25.6°C | 25.4°C | 25.5°C | 26.5°C | +1.3°C |
| Avg Low | 13.2°C | 13.3°C | 13.2°C | 14.3°C | 15.2°C | +2°C |
| Avg Rain | 294 mm | 265 mm | 244 mm | 295 mm | 222 mm | -72 mm |
September temperatures in East Kameng have risen by about 1.4°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 11.3°C (1997) to a record high of 28.1°C (2024).
Rainfall in September is a relatively wet time of year, averaging 267 mm, with a wettest year of 428 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
One of the best times to visit East Kameng
September is one of the best times to visit East Kameng. Expect days averaging 25.6°C and nights around 13.7°C (mean 19.7°C) — warmer than East Kameng's yearly average — with higher rainfall (267 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 26.7°C | 15.6°C | 21.2°C | 295 mm | 87% | 0.5 m/s | 4 |
| 2024 🔥 | 28.1°C | 15.1°C | 21.6°C | 168 mm | 85% | 0.5 m/s | 4.5 |
| 2023 | 27.4°C | 15.1°C | 21.3°C | 132 mm | 84% | 0.5 m/s | 4.5 |
| 2022 | 25.7°C | 14.8°C | 20.2°C | 179 mm | 89% | 0.5 m/s | 3.4 |
| 2021 | 25.3°C | 14.8°C | 20.1°C | 246 mm | 86% | 0.5 m/s | 4.6 |
| 2020 | 25.8°C | 15.5°C | 20.7°C | 314 mm | 91% | 0.5 m/s | 3.1 |
| 2019 | 24.9°C | 13.7°C | 19.3°C | 318 mm | 90% | 0.5 m/s | 3.2 |
| 2018 | 26.4°C | 15.1°C | 20.7°C | 261 mm | 91% | 0.5 m/s | 3.4 |
| 2017 | 25.4°C | 15.8°C | 20.6°C | 248 mm | 90% | 0.5 m/s | 3.3 |
| 2016 | 24.2°C | 15.3°C | 19.7°C | 278 mm | 91% | 0.6 m/s | 3.1 |
| 2015 | 24.9°C | 14.4°C | 19.6°C | 173 mm | 91% | 0.6 m/s | 3.6 |
| 2014 | 26.1°C | 12.9°C | 19.5°C | 401 mm | 89% | 0.6 m/s | 3.7 |
| 2013 | 25.6°C | 14.2°C | 19.9°C | 196 mm | 88% | 0.6 m/s | 4 |
| 2012 | 26.0°C | 14.9°C | 20.5°C | 371 mm | 91% | 0.6 m/s | 3.5 |
| 2011 | 26.6°C | 13.6°C | 20.1°C | 286 mm | 87% | 0.5 m/s | 4.1 |
| 2010 | 25.2°C | 13.2°C | 19.2°C | 416 mm | 89% | 0.5 m/s | 3.4 |
| 2009 | 25.4°C | 12.7°C | 19.0°C | 169 mm | 84% | 0.5 m/s | 4.6 |
| 2008 | 24.9°C | 14.3°C | 19.6°C | 189 mm | 87% | 0.5 m/s | 4.1 |
| 2007 | 25.8°C | 11.7°C | 18.8°C | 353 mm | 84% | 0.6 m/s | 4.1 |
| 2006 | 27.0°C | 13.4°C | 20.2°C | 206 mm | 86% | 0.5 m/s | 3.9 |
| 2005 | 26.4°C | 13.0°C | 19.7°C | 156 mm | 82% | 0.5 m/s | 4.6 |
| 2004 | 24.1°C | 12.6°C | 18.3°C | 199 mm | 88% | 0.5 m/s | 3.6 |
| 2003 | 24.9°C | 14.9°C | 19.9°C | 343 mm | 89% | 0.5 m/s | 3.4 |
| 2002 | 25.2°C | 11.9°C | 18.5°C | 209 mm | 84% | 0.5 m/s | 4.1 |
| 2001 | 24.7°C | 14.7°C | 19.7°C | 253 mm | 87% | 0.5 m/s | 3.6 |
| 2000 | 26.0°C | 12.3°C | 19.2°C | 359 mm | 88% | 0.5 m/s | 3.6 |
| 1999 | 25.5°C | 14.2°C | 19.8°C | 324 mm | 87% | 0.5 m/s | 4.3 |
| 1998 | 26.1°C | 14.0°C | 20.0°C | 127 mm | 84% | 0.6 m/s | 4.5 |
| 1997 | 25.3°C | 11.3°C | 18.3°C | 217 mm | 90% | 0.5 m/s | 4 |
| 1996 | 25.3°C | 14.3°C | 19.8°C | 172 mm | 87% | 0.5 m/s | 3.4 |
| 1995 | 26.8°C | 13.5°C | 20.1°C | 319 mm | 88% | 0.5 m/s | 3.8 |
| 1994 | 25.0°C | 12.5°C | 18.7°C | 227 mm | 86% | 0.5 m/s | 3.9 |
| 1993 | 25.2°C | 13.6°C | 19.4°C | 302 mm | 89% | 0.5 m/s | 3.2 |
| 1992 | 26.7°C | 12.3°C | 19.5°C | 131 mm | 85% | 0.6 m/s | 3.1 |
| 1991 🌧️ | 24.0°C | 14.5°C | 19.2°C | 428 mm | 91% | 0.5 m/s | 2.8 |
| 1990 | 25.6°C | 13.0°C | 19.3°C | 404 mm | 90% | 0.5 m/s | 2.6 |
| 1989 | 25.9°C | 14.2°C | 20.1°C | 301 mm | 90% | 0.5 m/s | 3.3 |
| 1988 | 25.0°C | 13.9°C | 19.4°C | 314 mm | 90% | 0.6 m/s | 2.4 |
| 1987 ❄️ | 23.5°C | 12.4°C | 17.9°C | 417 mm | 91% | 0.5 m/s | 2.9 |
| 1986 | 24.1°C | 11.9°C | 18.0°C | 237 mm | 87% | 0.5 m/s | 2.7 |
| 1985 | 25.7°C | 13.9°C | 19.8°C | 313 mm | 90% | 0.6 m/s | 3.1 |
| 1984 | 25.5°C | 12.0°C | 18.7°C | 258 mm | 90% | 0.6 m/s | 2.6 |
| 1983 | 25.3°C | 14.4°C | 19.8°C | 376 mm | 89% | 0.6 m/s | — |
| 1982 | 26.7°C | 12.6°C | 19.7°C | 190 mm | 88% | 0.6 m/s | — |
| 1981 | 25.5°C | 13.3°C | 19.4°C | 243 mm | 89% | 0.5 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 25.6°C with lows near 13.7°C (mean 19.7°C), based on 45 years of NASA POWER data.
September averages 267 mm of rainfall in East Kameng, a relatively wet time of year. The wettest on record was 428 mm in 1991.
The hottest September reached 28.1°C in 2024. The coldest dipped to 11.3°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.4°C. Daytime highs moved from 25.7°C to 26.6°C and overnight lows from 13.2°C to 15.1°C over the same span.
September is one of the warmer months of the year in East Kameng and a relatively wet time of year, so plan for around 25.6°C daytime highs and 13.7°C at night.
Not quite — September is the 9th coolest month in East Kameng, averaging 19.7°C.
For September in East Kameng, pack light layers you can adjust through the day, with typical highs of 25.6°C and lows of 13.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 88% — quite humid.
Average wind speed in September is 0.5 m/s. The windiest September on record averaged 0.6 m/s (1982).
The wettest September on record was 1991 with 428 mm. On average, September sees 267 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 East Kameng 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.
