September is one of the warmer months of the year in West Kameng, with average highs near 20.4°C and lows around 8.1°C (mean 14.3°C). It is a relatively wet time of year, averaging 160 mm of rainfall and 88% relative humidity across the period.
September is one of the warmer months of the year in West Kameng. Across 45 years of records, the warmest Septembers in West Kameng were 2020, 2024 and 2025 — when the month averaged 15.5°C — while the coldest was 1997 at 12.2°C. Typical September days reach 20.4°C with nights near 8.1°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 | 14.0°C | 13.8°C | 14.0°C | 14.5°C | 15.3°C | +1.3°C |
| Avg High | 20.4°C | 19.9°C | 20.3°C | 20.5°C | 21.3°C | +0.9°C |
| Avg Low | 7.6°C | 7.8°C | 7.6°C | 8.5°C | 9.2°C | +1.6°C |
| Avg Rain | 180 mm | 154 mm | 149 mm | 173 mm | 138 mm | -42 mm |
September temperatures in West Kameng have risen by about 1.2°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 5°C (1997) to a record high of 21.9°C (2024).
Rainfall in September is a relatively wet time of year, averaging 160 mm, with a wettest year of 276 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
One of the best times to visit West Kameng
September is one of the best times to visit West Kameng. Expect days averaging 20.4°C and nights around 8.1°C (mean 14.3°C) — warmer than West Kameng's yearly average — with higher rainfall (160 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 21.5°C | 9.5°C | 15.5°C | 162 mm | 88% | 0.8 m/s | 3.8 |
| 2024 | 21.9°C | 9.2°C | 15.5°C | 137 mm | 87% | 0.8 m/s | 4.1 |
| 2023 | 21.5°C | 8.7°C | 15.1°C | 70 mm | 86% | 0.8 m/s | 4.3 |
| 2022 | 20.7°C | 9.3°C | 15.0°C | 94 mm | 90% | 0.8 m/s | 3.4 |
| 2021 | 21.0°C | 8.9°C | 15.0°C | 184 mm | 88% | 0.8 m/s | 4.4 |
| 2020 🔥 | 21.5°C | 9.5°C | 15.5°C | 182 mm | 91% | 0.8 m/s | 3.3 |
| 2019 | 21.0°C | 7.8°C | 14.4°C | 202 mm | 90% | 0.8 m/s | 3.4 |
| 2018 | 21.0°C | 9.4°C | 15.2°C | 160 mm | 91% | 0.8 m/s | 3.7 |
| 2017 | 20.3°C | 10.4°C | 15.3°C | 139 mm | 91% | 0.8 m/s | 3.6 |
| 2016 | 20.5°C | 9.2°C | 14.9°C | 133 mm | 90% | 0.8 m/s | 3.3 |
| 2015 | 20.1°C | 8.5°C | 14.3°C | 99 mm | 91% | 0.8 m/s | 3.7 |
| 2014 🌧️ | 20.5°C | 8.2°C | 14.3°C | 276 mm | 89% | 0.9 m/s | 3.7 |
| 2013 | 20.5°C | 7.8°C | 14.1°C | 128 mm | 89% | 0.9 m/s | 3.9 |
| 2012 | 20.1°C | 8.4°C | 14.3°C | 192 mm | 90% | 0.9 m/s | 3.6 |
| 2011 | 21.2°C | 7.4°C | 14.3°C | 163 mm | 88% | 0.8 m/s | 4.2 |
| 2010 | 19.5°C | 8.2°C | 13.8°C | 236 mm | 89% | 0.8 m/s | 3.4 |
| 2009 | 20.8°C | 7.1°C | 14.0°C | 126 mm | 86% | 0.8 m/s | 4.3 |
| 2008 | 19.8°C | 8.3°C | 14.0°C | 107 mm | 88% | 0.8 m/s | 3.9 |
| 2007 | 20.6°C | 7.3°C | 14.0°C | 221 mm | 86% | 0.8 m/s | 3.9 |
| 2006 | 21.1°C | 7.1°C | 14.1°C | 115 mm | 87% | 0.8 m/s | 3.8 |
| 2005 | 20.6°C | 8.0°C | 14.3°C | 106 mm | 85% | 0.8 m/s | 4.5 |
| 2004 | 19.9°C | 7.1°C | 13.5°C | 132 mm | 88% | 0.8 m/s | 3.6 |
| 2003 | 20.2°C | 8.3°C | 14.3°C | 229 mm | 89% | 0.8 m/s | 3.5 |
| 2002 | 19.1°C | 8.0°C | 13.6°C | 107 mm | 86% | 0.8 m/s | 3.9 |
| 2001 | 20.7°C | 8.5°C | 14.6°C | 169 mm | 87% | 0.8 m/s | 3.5 |
| 2000 | 20.1°C | 6.3°C | 13.2°C | 180 mm | 88% | 0.8 m/s | 3.7 |
| 1999 | 19.8°C | 9.0°C | 14.4°C | 231 mm | 88% | 0.8 m/s | 4.4 |
| 1998 | 20.7°C | 8.8°C | 14.8°C | 98 mm | 86% | 0.8 m/s | 4.5 |
| 1997 ❄️ | 19.4°C | 5.0°C | 12.2°C | 135 mm | 90% | 0.8 m/s | 4.1 |
| 1996 | 19.4°C | 8.1°C | 13.7°C | 115 mm | 89% | 0.8 m/s | 4.1 |
| 1995 | 21.2°C | 7.5°C | 14.3°C | 197 mm | 88% | 0.8 m/s | 4.1 |
| 1994 | 19.7°C | 6.7°C | 13.2°C | 100 mm | 87% | 0.8 m/s | 4.5 |
| 1993 | 19.1°C | 8.6°C | 13.8°C | 171 mm | 89% | 0.8 m/s | 4.1 |
| 1992 | 21.2°C | 7.6°C | 14.4°C | 77 mm | 86% | 0.8 m/s | 3.9 |
| 1991 | 18.7°C | 8.9°C | 13.8°C | 229 mm | 91% | 0.8 m/s | 3.7 |
| 1990 | 19.8°C | 7.7°C | 13.8°C | 184 mm | 90% | 0.8 m/s | 3.5 |
| 1989 | 20.5°C | 8.2°C | 14.3°C | 195 mm | 89% | 0.8 m/s | 3.9 |
| 1988 | 20.2°C | 7.9°C | 14.0°C | 200 mm | 89% | 0.8 m/s | 3.2 |
| 1987 | 20.1°C | 8.3°C | 14.2°C | 238 mm | 91% | 0.9 m/s | 3.6 |
| 1986 | 20.2°C | 6.1°C | 13.1°C | 142 mm | 88% | 0.8 m/s | 3.3 |
| 1985 | 20.6°C | 7.3°C | 13.9°C | 208 mm | 88% | 0.9 m/s | 3.8 |
| 1984 | 20.3°C | 7.3°C | 13.8°C | 166 mm | 89% | 0.9 m/s | 3.6 |
| 1983 | 20.8°C | 8.8°C | 14.8°C | 220 mm | 89% | 0.9 m/s | — |
| 1982 | 20.9°C | 6.8°C | 13.8°C | 88 mm | 88% | 0.9 m/s | — |
| 1981 | 20.3°C | 7.3°C | 13.8°C | 163 mm | 89% | 0.8 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 20.4°C with lows near 8.1°C (mean 14.3°C), based on 45 years of NASA POWER data.
September averages 160 mm of rainfall in West Kameng, a relatively wet time of year. The wettest on record was 276 mm in 2014.
The hottest September reached 21.9°C in 2024. The coldest dipped to 5°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.2°C. Daytime highs moved from 20.6°C to 21.3°C and overnight lows from 7.5°C to 9.1°C over the same span.
September is one of the warmer months of the year in West Kameng and a relatively wet time of year, so plan for around 20.4°C daytime highs and 8.1°C at night.
Not quite — September is the 9th coolest month in West Kameng, averaging 14.3°C.
For September in West Kameng, pack light layers you can adjust through the day, with typical highs of 20.4°C and lows of 8.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 88% — quite humid.
Average wind speed in September is 0.8 m/s. The windiest September on record averaged 0.9 m/s (1982).
The wettest September on record was 2014 with 276 mm. On average, September sees 160 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 West 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.
