September is one of the warmer months of the year in Chatra, with average highs near 29.4°C and lows around 22.8°C (mean 26.1°C). It is a relatively wet time of year, averaging 205 mm of rainfall and 86% relative humidity across the period.
September is one of the warmer months of the year in Chatra. Across 45 years of records, the warmest September in Chatra was 2023 — when the month averaged 27°C — while the coldest was 1984 at 24.9°C. Typical September days reach 29.4°C with nights near 22.8°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Chatra, averaging 205 mm of rainfall. The wettest September on record was 1995 with 377 mm, while the driest was 2015 at 82 mm.
Relative humidity in Chatra during September averages 86%. The most humid September was 2011 at 90%, and the least humid was 1986 at 79%.
September receives about 4.7 kWh/m²/day of solar energy in Chatra. The sunniest Septembers were 1988 and 2015 at 5.4 kWh/m²/day, and the cloudiest were 2016 and 2022 at 4.
Average wind speed in Chatra during September is 1.9 m/s. The windiest September was 2011 at 2.5 m/s, while the calmest was 2017 at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.2°C | 25.8°C | 26.0°C | 26.2°C | 26.5°C | +0.3°C |
| Avg High | 29.7°C | 29.1°C | 29.3°C | 29.4°C | 29.6°C | -0.1°C |
| Avg Low | 22.7°C | 22.6°C | 22.8°C | 22.9°C | 23.5°C | +0.8°C |
| Avg Rain | 167 mm | 201 mm | 195 mm | 212 mm | 270 mm | +103 mm |
September temperatures in Chatra have risen by about 0.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 16.6°C (1984) to a record high of 33.5°C (1986).
Rainfall in September is a relatively wet time of year, averaging 205 mm, with a wettest year of 377 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Chatra
September is a good time to visit Chatra, with days averaging 29.4°C and nights around 22.8°C (mean 26.1°C, warmer than Chatra's yearly average) and higher rainfall. February and November are marginally more temperate, but September still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 29.3°C | 26.3°C | 23.3°C | 31.1°C | 21.5°C | 235 mm | 88% | 1.6 m/s | 4.4 |
| 2024 | 29.4°C | 26.6°C | 23.8°C | 31.7°C | 21.5°C | 339 mm | 89% | 2.4 m/s | 4.3 |
| 2023 🔥 | 30.3°C | 27.0°C | 23.8°C | 33.0°C | 22.4°C | 255 mm | 86% | 1.8 m/s | 4.2 |
| 2022 | 29.5°C | 26.4°C | 23.3°C | 31.1°C | 22.1°C | 164 mm | 87% | 1.7 m/s | 4 |
| 2021 | 29.3°C | 26.2°C | 23.1°C | 31.5°C | 21.3°C | 260 mm | 88% | 2.3 m/s | 4.6 |
| 2020 | 29.6°C | 26.6°C | 23.6°C | 31.0°C | 20.7°C | 367 mm | 88% | 1.5 m/s | 4.5 |
| 2019 | 29.4°C | 26.4°C | 23.4°C | 31.8°C | 21.4°C | 279 mm | 88% | 2.1 m/s | 4.2 |
| 2018 | 29.2°C | 25.9°C | 22.5°C | 30.9°C | 19.9°C | 148 mm | 87% | 1.9 m/s | 4.8 |
| 2017 | 30.2°C | 26.8°C | 23.5°C | 31.3°C | 21.6°C | 143 mm | 85% | 1.4 m/s | 4.8 |
| 2016 | 29.1°C | 26.2°C | 23.3°C | 30.9°C | 22.1°C | 332 mm | 89% | 1.8 m/s | 4 |
| 2015 | 30.1°C | 26.4°C | 22.7°C | 31.6°C | 20.2°C | 82 mm | 83% | 1.9 m/s | 5.4 |
| 2014 | 29.6°C | 26.1°C | 22.5°C | 31.1°C | 19.7°C | 154 mm | 85% | 1.8 m/s | 4.9 |
| 2013 | 29.5°C | 26.1°C | 22.7°C | 31.3°C | 21.0°C | 221 mm | 86% | 1.7 m/s | 4.9 |
| 2012 | 28.8°C | 25.6°C | 22.4°C | 31.1°C | 17.9°C | 215 mm | 87% | 1.7 m/s | 4.8 |
| 2011 | 28.4°C | 25.8°C | 23.1°C | 30.6°C | 20.8°C | 319 mm | 90% | 2.5 m/s | 4.3 |
| 2010 | 30.0°C | 26.4°C | 22.8°C | 32.6°C | 18.3°C | 232 mm | 84% | 2 m/s | 4.8 |
| 2009 | 30.0°C | 26.6°C | 23.1°C | 31.6°C | 22.0°C | 264 mm | 85% | 1.8 m/s | 5 |
| 2008 | 29.3°C | 25.9°C | 22.5°C | 31.1°C | 20.0°C | 113 mm | 86% | 1.9 m/s | 5.2 |
| 2007 | 28.6°C | 25.9°C | 23.1°C | 31.4°C | 21.9°C | 283 mm | 89% | 2.1 m/s | 4.5 |
| 2006 | 29.0°C | 25.8°C | 22.5°C | 30.9°C | 20.1°C | 220 mm | 87% | 2 m/s | 4.7 |
| 2005 | 29.9°C | 26.4°C | 22.9°C | 31.6°C | 20.5°C | 139 mm | 86% | 2.3 m/s | 4.7 |
| 2004 | 29.2°C | 26.0°C | 22.8°C | 32.2°C | 20.6°C | 129 mm | 85% | 1.8 m/s | 4.8 |
| 2003 | 29.5°C | 26.5°C | 23.5°C | 30.9°C | 22.3°C | 203 mm | 89% | 2 m/s | 4.7 |
| 2002 | 28.9°C | 25.5°C | 22.2°C | 30.2°C | 20.4°C | 231 mm | 87% | 2 m/s | 4.7 |
| 2001 | 29.3°C | 26.0°C | 22.8°C | 31.0°C | 20.5°C | 88 mm | 86% | 1.9 m/s | 5 |
| 2000 | 29.0°C | 25.8°C | 22.6°C | 30.7°C | 20.2°C | 281 mm | 87% | 2.3 m/s | 4.2 |
| 1999 | 28.6°C | 25.8°C | 23.0°C | 30.2°C | 21.6°C | 115 mm | 90% | 2.3 m/s | 4.8 |
| 1998 | 29.3°C | 26.4°C | 23.4°C | 31.6°C | 22.2°C | 297 mm | 88% | 2 m/s | 4.8 |
| 1997 | 29.1°C | 25.7°C | 22.3°C | 30.7°C | 19.3°C | 140 mm | 87% | 1.5 m/s | 4.7 |
| 1996 | 29.6°C | 26.2°C | 22.7°C | 31.0°C | 21.1°C | 125 mm | 86% | 1.5 m/s | 4.8 |
| 1995 🌧️ | 28.9°C | 25.7°C | 22.5°C | 30.6°C | 19.7°C | 377 mm | 87% | 2.2 m/s | 4.5 |
| 1994 | 28.5°C | 25.0°C | 21.6°C | 30.5°C | 17.0°C | 145 mm | 84% | 2.4 m/s | 4.8 |
| 1993 | 28.9°C | 25.7°C | 22.5°C | 31.3°C | 21.1°C | 355 mm | 88% | 2.1 m/s | 4.2 |
| 1992 | 29.5°C | 25.7°C | 21.9°C | 31.6°C | 19.8°C | 86 mm | 84% | 2.2 m/s | 5.3 |
| 1991 | 28.8°C | 25.6°C | 22.5°C | 30.8°C | 19.7°C | 221 mm | 87% | 1.6 m/s | 4.8 |
| 1990 | 29.3°C | 26.3°C | 23.3°C | 31.8°C | 21.0°C | 153 mm | 88% | 2 m/s | 4.6 |
| 1989 | 30.5°C | 26.9°C | 23.4°C | 33.1°C | 22.1°C | 133 mm | 83% | 1.8 m/s | 4.8 |
| 1988 | 30.0°C | 26.6°C | 23.2°C | 31.8°C | 21.2°C | 125 mm | 86% | 1.8 m/s | 5.4 |
| 1987 | 29.6°C | 26.4°C | 23.3°C | 31.7°C | 19.8°C | 286 mm | 88% | 2 m/s | 4.4 |
| 1986 | 30.4°C | 26.3°C | 22.2°C | 33.5°C | 19.7°C | 105 mm | 79% | 2.3 m/s | 4.9 |
| 1985 | 29.2°C | 25.9°C | 22.6°C | 31.2°C | 20.1°C | 212 mm | 86% | 1.9 m/s | 5.2 |
| 1984 ❄️ | 28.4°C | 24.9°C | 21.3°C | 29.5°C | 16.6°C | 149 mm | 86% | 2.1 m/s | 4.9 |
| 1983 | 30.4°C | 26.8°C | 23.3°C | 32.6°C | 21.7°C | 145 mm | 84% | 1.9 m/s | — |
| 1982 | 30.1°C | 25.9°C | 21.7°C | 31.6°C | 17.2°C | 109 mm | 82% | 1.8 m/s | — |
| 1981 | 28.8°C | 25.9°C | 22.9°C | 31.0°C | 21.1°C | 241 mm | 88% | 2.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 29.4°C with lows near 22.8°C (mean 26.1°C), based on 45 years of NASA POWER data.
September averages 205 mm of rainfall in Chatra, a relatively wet time of year. The wettest on record was 377 mm in 1995.
The hottest September reached 33.5°C in 1986. The coldest dipped to 16.6°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.6°C. Daytime highs moved from 29.4°C to 29.6°C and overnight lows from 22.4°C to 23.5°C over the same span.
September is one of the warmer months of the year in Chatra and a relatively wet time of year, so plan for around 29.4°C daytime highs and 22.8°C at night.
Not quite — September is the 7th coolest month in Chatra, averaging 26.1°C.
For September in Chatra, pack light layers you can adjust through the day, with typical highs of 29.4°C and lows of 22.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 86% — quite humid.
Average wind speed in September is 1.9 m/s. The windiest September on record averaged 2.5 m/s (2011).
The wettest September on record was 1995 with 377 mm. On average, September sees 205 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 Chatra 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.
