September is one of the warmer months of the year in Chamoli, with average highs near 18.1°C and lows around 4.5°C (mean 11.3°C). It is a relatively wet time of year, averaging 108 mm of rainfall and 79% relative humidity across the period.
September is one of the warmer months of the year in Chamoli. Across 45 years of records, the warmest September in Chamoli was 2021 — when the month averaged 13.1°C — while the coldest were 1982, 1984 and 1997 at 10°C. Typical September days reach 18.1°C with nights near 4.5°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 | 11.0°C | 11.0°C | 10.7°C | 11.5°C | 12.7°C | +1.7°C |
| Avg High | 18.7°C | 17.8°C | 17.5°C | 17.7°C | 19.3°C | +0.6°C |
| Avg Low | 3.3°C | 4.2°C | 3.9°C | 5.3°C | 6.1°C | +2.8°C |
| Avg Rain | 76 mm | 98 mm | 111 mm | 132 mm | 129 mm | +53 mm |
September temperatures in Chamoli have risen by about 2°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 1.9°C (1997) to a record high of 21°C (1988).
Rainfall in September is a relatively wet time of year, averaging 108 mm, with a wettest year of 374 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.1°C per decade while lows rose 0.7°C per decade, narrowing the gap between day and night.
One of the best times to visit Chamoli
September is one of the best times to visit Chamoli. Expect days averaging 18.1°C and nights around 4.5°C (mean 11.3°C) — warmer than Chamoli's yearly average — with higher rainfall (108 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 18.6°C | 7.0°C | 12.8°C | 121 mm | 87% | 1.4 m/s | 4.7 |
| 2024 | 18.5°C | 6.9°C | 12.7°C | 160 mm | 88% | 1.5 m/s | 4.5 |
| 2023 | 19.4°C | 5.4°C | 12.4°C | 84 mm | 82% | 1.4 m/s | 5.1 |
| 2022 | 19.2°C | 5.8°C | 12.5°C | 304 mm | 87% | 1.6 m/s | 4.4 |
| 2021 🔥 | 19.2°C | 7.0°C | 13.1°C | 94 mm | 85% | 1.4 m/s | 4.6 |
| 2020 | 20.6°C | 4.4°C | 12.5°C | 11 mm | 68% | 1.5 m/s | 5.5 |
| 2019 | 19.8°C | 4.9°C | 12.4°C | 109 mm | 83% | 1.5 m/s | 4.8 |
| 2018 | 17.6°C | 5.7°C | 11.6°C | 98 mm | 83% | 1.5 m/s | 4.7 |
| 2017 | 18.7°C | 6.2°C | 12.4°C | 147 mm | 80% | 1.4 m/s | 5 |
| 2016 | 18.3°C | 5.8°C | 12.0°C | 31 mm | 82% | 1.5 m/s | 5.7 |
| 2015 | 18.5°C | 4.7°C | 11.6°C | 33 mm | 73% | 1.6 m/s | 5.8 |
| 2014 | 17.5°C | 5.6°C | 11.5°C | 74 mm | 87% | 1.6 m/s | 5.3 |
| 2013 | 16.7°C | 5.6°C | 11.1°C | 92 mm | 88% | 1.4 m/s | 5.2 |
| 2012 | 17.1°C | 5.6°C | 11.3°C | 194 mm | 88% | 1.6 m/s | 5 |
| 2011 | 16.7°C | 4.4°C | 10.6°C | 172 mm | 81% | 1.5 m/s | 5.2 |
| 2010 🌧️ | 16.4°C | 4.4°C | 10.4°C | 374 mm | 87% | 1.4 m/s | 3.9 |
| 2009 | 19.2°C | 3.8°C | 11.5°C | 140 mm | 76% | 1.4 m/s | 4.7 |
| 2008 | 16.1°C | 4.5°C | 10.3°C | 107 mm | 82% | 1.4 m/s | 4.8 |
| 2007 | 17.0°C | 4.0°C | 10.5°C | 122 mm | 84% | 1.4 m/s | 5 |
| 2006 | 17.4°C | 3.6°C | 10.5°C | 73 mm | 77% | 1.5 m/s | 5.3 |
| 2005 | 18.2°C | 3.6°C | 10.9°C | 204 mm | 84% | 1.3 m/s | 4.4 |
| 2004 | 19.3°C | 3.9°C | 11.6°C | 42 mm | 69% | 1.5 m/s | 5.4 |
| 2003 | 17.4°C | 3.4°C | 10.4°C | 174 mm | 84% | 1.4 m/s | 4.6 |
| 2002 | 16.5°C | 4.3°C | 10.4°C | 131 mm | 79% | 1.5 m/s | 4 |
| 2001 | 16.4°C | 4.3°C | 10.3°C | 46 mm | 72% | 1.4 m/s | 6.1 |
| 2000 | 17.7°C | 3.5°C | 10.6°C | 75 mm | 74% | 1.6 m/s | 5 |
| 1999 | 19.5°C | 4.8°C | 12.2°C | 108 mm | 82% | 1.5 m/s | 4.7 |
| 1998 | 17.8°C | 5.3°C | 11.6°C | 94 mm | 83% | 1.4 m/s | 4.9 |
| 1997 | 18.2°C | 1.9°C | 10.0°C | 47 mm | 77% | 1.6 m/s | 4.7 |
| 1996 | 17.0°C | 5.5°C | 11.2°C | 137 mm | 87% | 1.3 m/s | 4.8 |
| 1995 | 16.3°C | 4.9°C | 10.6°C | 122 mm | 82% | 1.4 m/s | 4.7 |
| 1994 | 17.3°C | 4.2°C | 10.7°C | 24 mm | 73% | 1.4 m/s | 5.7 |
| 1993 | 17.2°C | 3.4°C | 10.3°C | 166 mm | 81% | 1.5 m/s | 4 |
| 1992 | 18.7°C | 4.4°C | 11.5°C | 70 mm | 77% | 1.6 m/s | 4.4 |
| 1991 | 17.7°C | 2.5°C | 10.1°C | 69 mm | 76% | 1.5 m/s | 4.9 |
| 1990 | 18.7°C | 5.1°C | 11.9°C | 146 mm | 86% | 1.5 m/s | 3.8 |
| 1989 | 18.4°C | 3.3°C | 10.9°C | 47 mm | 71% | 1.6 m/s | 4.7 |
| 1988 | 21.0°C | 4.1°C | 12.5°C | 96 mm | 76% | 1.5 m/s | 4.5 |
| 1987 | 19.2°C | 2.7°C | 10.9°C | 33 mm | 64% | 1.7 m/s | 5.5 |
| 1986 | 20.1°C | 2.2°C | 11.1°C | 74 mm | 62% | 1.6 m/s | 4.7 |
| 1985 | 18.1°C | 4.7°C | 11.4°C | 116 mm | 83% | 1.5 m/s | 4.2 |
| 1984 | 17.5°C | 2.5°C | 10.0°C | 92 mm | 77% | 1.5 m/s | 4.8 |
| 1983 | 18.2°C | 4.6°C | 11.4°C | 139 mm | 81% | 1.4 m/s | — |
| 1982 ❄️ | 17.9°C | 2.0°C | 10.0°C | 17 mm | 65% | 1.5 m/s | — |
| 1981 | 17.5°C | 4.0°C | 10.8°C | 73 mm | 79% | 1.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 18.1°C with lows near 4.5°C (mean 11.3°C), based on 45 years of NASA POWER data.
September averages 108 mm of rainfall in Chamoli, a relatively wet time of year. The wettest on record was 374 mm in 2010.
The hottest September reached 21°C in 1988. The coldest dipped to 1.9°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 17.8°C to 19°C and overnight lows from 3.6°C to 6.4°C over the same span.
September is one of the warmer months of the year in Chamoli and a relatively wet time of year, so plan for around 18.1°C daytime highs and 4.5°C at night.
Not quite — September is the 8th coolest month in Chamoli, averaging 11.3°C.
For September in Chamoli, pack warm layers and a jacket for chilly mornings, with typical highs of 18.1°C and lows of 4.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 79% — quite humid.
Average wind speed in September is 1.5 m/s. The windiest September on record averaged 1.7 m/s (1987).
The wettest September on record was 2010 with 374 mm. On average, September sees 108 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 Chamoli 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.
