September is one of the warmer months of the year in Koderma, with average highs near 32.5°C and lows around 21.5°C (mean 27°C). It is a relatively wet time of year, averaging 190 mm of rainfall and 85% relative humidity across the period.
September is one of the warmer months of the year in Koderma. Across 45 years of records, the warmest Septembers in Koderma were 1989 and 2023 — when the month averaged 28.8°C — while the coldest was 1984 at 23.9°C. Typical September days reach 32.5°C with nights near 21.5°C. The long-term trend is warming, about 0.2°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.9°C | 26.6°C | 27.0°C | 26.9°C | 27.7°C | +0.8°C |
| Avg High | 33.0°C | 32.1°C | 32.2°C | 32.5°C | 32.7°C | -0.3°C |
| Avg Low | 20.8°C | 21.2°C | 21.8°C | 21.3°C | 22.7°C | +1.9°C |
| Avg Rain | 166 mm | 184 mm | 182 mm | 203 mm | 226 mm | +60 mm |
September temperatures in Koderma have risen by about 1.4°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 17°C (1994) to a record high of 34.8°C (1989).
Rainfall in September is a relatively wet time of year, averaging 190 mm, with a wettest year of 355 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A good time to visit Koderma
September is a good time to visit Koderma, with days averaging 32.5°C and nights around 21.5°C (mean 27°C, warmer than Koderma's yearly average) and higher rainfall. October and November are marginally more temperate, but September still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 32.4°C | 22.5°C | 27.4°C | 174 mm | 87% | 1.5 m/s | 4.4 |
| 2024 | 32.9°C | 22.3°C | 27.6°C | 311 mm | 88% | 2.4 m/s | 4.4 |
| 2023 | 33.8°C | 23.8°C | 28.8°C | 263 mm | 86% | 1.9 m/s | 4.1 |
| 2022 | 32.1°C | 23.0°C | 27.6°C | 145 mm | 86% | 1.7 m/s | 4 |
| 2021 | 32.3°C | 22.6°C | 27.5°C | 228 mm | 87% | 2.2 m/s | 4.3 |
| 2020 | 32.4°C | 22.0°C | 27.2°C | 232 mm | 86% | 1.5 m/s | 4.3 |
| 2019 | 33.2°C | 22.1°C | 27.7°C | 329 mm | 86% | 2.1 m/s | 3.9 |
| 2018 | 32.2°C | 21.5°C | 26.8°C | 101 mm | 84% | 2 m/s | 4.7 |
| 2017 | 32.7°C | 22.6°C | 27.6°C | 144 mm | 85% | 1.5 m/s | 4.8 |
| 2016 | 32.1°C | 23.1°C | 27.6°C | 342 mm | 88% | 1.7 m/s | 4.1 |
| 2015 | 33.1°C | 21.0°C | 27.0°C | 107 mm | 81% | 1.9 m/s | 5.2 |
| 2014 | 32.2°C | 20.8°C | 26.5°C | 169 mm | 84% | 1.8 m/s | 4.8 |
| 2013 | 32.1°C | 22.2°C | 27.1°C | 203 mm | 84% | 1.7 m/s | 4.7 |
| 2012 | 31.9°C | 18.4°C | 25.2°C | 185 mm | 86% | 1.7 m/s | 4.7 |
| 2011 | 32.0°C | 21.6°C | 26.8°C | 292 mm | 89% | 2.6 m/s | 4.3 |
| 2010 | 33.9°C | 20.0°C | 26.9°C | 158 mm | 83% | 2.1 m/s | 4.7 |
| 2009 | 32.5°C | 23.0°C | 27.7°C | 232 mm | 84% | 1.9 m/s | 4.8 |
| 2008 | 32.3°C | 21.0°C | 26.7°C | 110 mm | 85% | 1.8 m/s | 4.9 |
| 2007 | 32.1°C | 22.5°C | 27.3°C | 273 mm | 88% | 2.2 m/s | 4.4 |
| 2006 | 32.3°C | 22.2°C | 27.2°C | 227 mm | 86% | 2 m/s | 4.4 |
| 2005 | 32.9°C | 21.9°C | 27.4°C | 130 mm | 84% | 2.3 m/s | 4.7 |
| 2004 | 33.7°C | 21.5°C | 27.6°C | 116 mm | 84% | 2 m/s | 4.5 |
| 2003 | 31.6°C | 22.4°C | 27.0°C | 170 mm | 88% | 2.1 m/s | 4.4 |
| 2002 | 31.5°C | 21.5°C | 26.5°C | 174 mm | 85% | 2.1 m/s | 4.6 |
| 2001 | 31.8°C | 21.3°C | 26.5°C | 119 mm | 85% | 1.7 m/s | 4.6 |
| 2000 | 31.4°C | 21.1°C | 26.3°C | 266 mm | 87% | 2.4 m/s | 4 |
| 1999 | 31.0°C | 22.2°C | 26.6°C | 97 mm | 89% | 2.5 m/s | 4.5 |
| 1998 | 32.3°C | 22.8°C | 27.5°C | 261 mm | 87% | 2.1 m/s | 4.5 |
| 1997 | 31.5°C | 20.4°C | 26.0°C | 128 mm | 86% | 1.6 m/s | 4.6 |
| 1996 | 32.2°C | 22.5°C | 27.3°C | 119 mm | 85% | 1.5 m/s | 4.6 |
| 1995 🌧️ | 32.0°C | 20.9°C | 26.5°C | 355 mm | 86% | 2.3 m/s | 4.4 |
| 1994 | 31.4°C | 17.0°C | 24.2°C | 132 mm | 83% | 2.4 m/s | 4.8 |
| 1993 | 32.1°C | 22.1°C | 27.1°C | 347 mm | 87% | 2.2 m/s | 4.1 |
| 1992 | 33.0°C | 21.0°C | 27.0°C | 67 mm | 81% | 2.2 m/s | 5.1 |
| 1991 | 32.1°C | 21.3°C | 26.7°C | 198 mm | 86% | 1.6 m/s | 4.4 |
| 1990 | 32.9°C | 21.9°C | 27.4°C | 137 mm | 87% | 2.1 m/s | 4.6 |
| 1989 🔥 | 34.8°C | 22.7°C | 28.8°C | 135 mm | 80% | 2 m/s | 4.7 |
| 1988 | 33.0°C | 21.9°C | 27.5°C | 118 mm | 85% | 1.8 m/s | 5.3 |
| 1987 | 32.9°C | 20.6°C | 26.7°C | 313 mm | 87% | 2 m/s | 4.4 |
| 1986 | 34.5°C | 20.5°C | 27.5°C | 96 mm | 78% | 2.4 m/s | 4.6 |
| 1985 | 32.6°C | 21.0°C | 26.8°C | 229 mm | 85% | 1.9 m/s | 5.1 |
| 1984 ❄️ | 30.5°C | 17.2°C | 23.9°C | 173 mm | 86% | 2.1 m/s | 4.8 |
| 1983 | 33.9°C | 22.7°C | 28.3°C | 105 mm | 80% | 2.1 m/s | — |
| 1982 | 33.0°C | 19.0°C | 26.0°C | 102 mm | 80% | 2 m/s | — |
| 1981 | 31.8°C | 22.0°C | 26.9°C | 219 mm | 87% | 2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 32.5°C with lows near 21.5°C (mean 27°C), based on 45 years of NASA POWER data.
September averages 190 mm of rainfall in Koderma, a relatively wet time of year. The wettest on record was 355 mm in 1995.
The hottest September reached 34.8°C in 1989. The coldest dipped to 17°C in 1994.
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 32.4°C to 32.7°C and overnight lows from 20.4°C to 22.8°C over the same span.
September is one of the warmer months of the year in Koderma and a relatively wet time of year, so plan for around 32.5°C daytime highs and 21.5°C at night.
Not quite — September is the 7th coolest month in Koderma, averaging 27°C.
For September in Koderma, pack light, breathable clothing and sun protection, with typical highs of 32.5°C and lows of 21.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 85% — quite humid.
Average wind speed in September is 2 m/s. The windiest September on record averaged 2.6 m/s (2011).
The wettest September on record was 1995 with 355 mm. On average, September sees 190 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 Koderma 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.
