September is one of the warmer months of the year in Madhepura, with average highs near 31.5°C and lows around 24.8°C (mean 28.2°C). It is a relatively wet time of year, averaging 187 mm of rainfall and 84% relative humidity across the period.
September is one of the warmer months of the year in Madhepura. Across 45 years of records, the warmest September in Madhepura was 1992 — when the month averaged 30°C — while the coldest was 1984 at 26.7°C. Typical September days reach 31.5°C with nights near 24.8°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Madhepura, averaging 187 mm of rainfall. The wettest September on record was 2020 with 588 mm, while the driest was 1992 at 56 mm.
Relative humidity in Madhepura during September averages 84%. The most humid September was 2021 at 90%, and the least humid was 1992 at 67%.
September receives about 4.6 kWh/m²/day of solar energy in Madhepura. The sunniest September was 1994 at 5.2 kWh/m²/day, and the cloudiest were 2019 and 2020 at 3.8.
Average wind speed in Madhepura during September is 2 m/s. The windiest September was 1995 at 2.8 m/s, while the calmest were 2016, 2020 and 2025 at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.9°C | 28.5°C | 27.9°C | 28.1°C | 28.3°C | +0.4°C |
| Avg High | 31.4°C | 32.3°C | 31.2°C | 31.3°C | 31.1°C | -0.3°C |
| Avg Low | 24.5°C | 24.7°C | 24.6°C | 25.0°C | 25.5°C | +1°C |
| Avg Rain | 171 mm | 119 mm | 175 mm | 204 mm | 318 mm | +147 mm |
September temperatures in Madhepura have risen by about 0.5°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 19°C (1994) to a record high of 37.8°C (1992).
Rainfall in September is a relatively wet time of year, averaging 187 mm, with a wettest year of 588 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.2°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Madhepura
September is a good time to visit Madhepura, with days averaging 31.5°C and nights around 24.8°C (mean 28.2°C, warmer than Madhepura's yearly average) and higher rainfall. November and February 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 | 31.6°C | 28.5°C | 25.3°C | 33.2°C | 24.5°C | 239 mm | 86% | 1.4 m/s | 4.5 |
| 2024 | 31.5°C | 28.6°C | 25.7°C | 35.7°C | 23.5°C | 358 mm | 88% | 2.1 m/s | 4.5 |
| 2023 | 30.9°C | 28.3°C | 25.7°C | 33.5°C | 24.6°C | 335 mm | 89% | 1.9 m/s | 4.1 |
| 2022 | 30.9°C | 28.0°C | 25.1°C | 32.5°C | 23.5°C | 257 mm | 88% | 1.8 m/s | 3.9 |
| 2021 | 30.9°C | 28.1°C | 25.3°C | 32.9°C | 23.9°C | 130 mm | 90% | 1.9 m/s | 4.6 |
| 2020 🌧️ | 30.8°C | 28.2°C | 25.7°C | 33.3°C | 23.5°C | 588 mm | 89% | 1.4 m/s | 3.8 |
| 2019 | 30.4°C | 27.8°C | 25.3°C | 33.7°C | 21.7°C | 370 mm | 89% | 2 m/s | 3.8 |
| 2018 | 32.1°C | 28.6°C | 25.1°C | 33.5°C | 23.5°C | 159 mm | 84% | 1.9 m/s | 4.9 |
| 2017 | 31.4°C | 28.6°C | 25.7°C | 33.3°C | 24.8°C | 139 mm | 88% | 1.8 m/s | 4.6 |
| 2016 | 30.7°C | 28.0°C | 25.4°C | 32.5°C | 23.5°C | 373 mm | 89% | 1.4 m/s | 4.1 |
| 2015 | 31.8°C | 28.3°C | 24.8°C | 34.0°C | 21.0°C | 199 mm | 85% | 1.6 m/s | 5 |
| 2014 | 31.2°C | 28.0°C | 24.9°C | 33.7°C | 22.4°C | 182 mm | 86% | 1.7 m/s | 4.6 |
| 2013 | 32.6°C | 28.7°C | 24.8°C | 35.5°C | 22.9°C | 96 mm | 81% | 1.8 m/s | 5 |
| 2012 | 31.6°C | 27.9°C | 24.1°C | 35.1°C | 21.7°C | 137 mm | 84% | 2.1 m/s | 4.5 |
| 2011 | 30.4°C | 27.6°C | 24.9°C | 33.5°C | 22.2°C | 202 mm | 89% | 2.5 m/s | 4.5 |
| 2010 | 30.6°C | 27.6°C | 24.6°C | 32.4°C | 21.9°C | 186 mm | 88% | 2 m/s | 4.7 |
| 2009 | 31.3°C | 28.0°C | 24.7°C | 33.4°C | 23.5°C | 112 mm | 86% | 1.9 m/s | 4.9 |
| 2008 | 30.8°C | 27.6°C | 24.5°C | 32.4°C | 22.3°C | 139 mm | 87% | 1.7 m/s | 4.9 |
| 2007 | 30.5°C | 27.5°C | 24.5°C | 32.4°C | 21.8°C | 258 mm | 87% | 2.1 m/s | 4.3 |
| 2006 | 30.7°C | 27.5°C | 24.3°C | 34.8°C | 22.3°C | 404 mm | 86% | 2.4 m/s | 4.4 |
| 2005 | 31.4°C | 28.2°C | 24.9°C | 33.7°C | 23.6°C | 107 mm | 86% | 1.7 m/s | 4.8 |
| 2004 | 30.6°C | 27.5°C | 24.3°C | 32.8°C | 21.9°C | 106 mm | 87% | 1.9 m/s | 4.6 |
| 2003 | 32.4°C | 29.0°C | 25.6°C | 35.0°C | 23.4°C | 123 mm | 81% | 2.5 m/s | 4.8 |
| 2002 | 31.9°C | 28.0°C | 24.1°C | 34.7°C | 22.2°C | 148 mm | 81% | 2.4 m/s | 4.7 |
| 2001 | 31.1°C | 28.0°C | 24.8°C | 32.9°C | 23.2°C | 185 mm | 85% | 1.7 m/s | 4.4 |
| 2000 | 30.9°C | 27.6°C | 24.3°C | 33.7°C | 22.1°C | 169 mm | 85% | 2.4 m/s | 4.3 |
| 1999 | 31.1°C | 27.9°C | 24.8°C | 32.9°C | 22.1°C | 85 mm | 85% | 2.7 m/s | 4.3 |
| 1998 | 31.6°C | 28.3°C | 25.0°C | 34.3°C | 23.7°C | 146 mm | 85% | 2 m/s | 4.6 |
| 1997 | 32.0°C | 28.3°C | 24.6°C | 33.9°C | 21.4°C | 84 mm | 82% | 1.8 m/s | 4.7 |
| 1996 | 32.9°C | 28.9°C | 25.0°C | 35.6°C | 22.9°C | 95 mm | 78% | 1.8 m/s | 4.8 |
| 1995 | 31.4°C | 28.0°C | 24.6°C | 34.0°C | 22.1°C | 97 mm | 83% | 2.8 m/s | 4.7 |
| 1994 | 34.4°C | 29.4°C | 24.5°C | 36.8°C | 19.0°C | 73 mm | 69% | 2.5 m/s | 5.2 |
| 1993 | 31.8°C | 28.2°C | 24.5°C | 36.2°C | 22.7°C | 189 mm | 80% | 2.5 m/s | 4.2 |
| 1992 🔥 | 35.0°C | 30.0°C | 24.9°C | 37.8°C | 22.1°C | 56 mm | 67% | 2.3 m/s | 5 |
| 1991 | 30.4°C | 27.4°C | 24.5°C | 32.5°C | 23.1°C | 253 mm | 87% | 2.1 m/s | 4.3 |
| 1990 | 32.0°C | 28.5°C | 25.0°C | 35.2°C | 22.4°C | 107 mm | 82% | 2.1 m/s | 4.4 |
| 1989 | 33.0°C | 29.2°C | 25.4°C | 36.3°C | 23.4°C | 151 mm | 78% | 2.3 m/s | 4.3 |
| 1988 | 31.9°C | 28.3°C | 24.8°C | 33.7°C | 21.9°C | 98 mm | 84% | 1.9 m/s | 5 |
| 1987 | 30.6°C | 27.7°C | 24.8°C | 32.5°C | 22.1°C | 312 mm | 88% | 1.8 m/s | 4.7 |
| 1986 | 30.9°C | 27.4°C | 23.8°C | 33.8°C | 21.9°C | 164 mm | 83% | 2.5 m/s | 4.7 |
| 1985 | 30.5°C | 27.5°C | 24.5°C | 32.7°C | 23.0°C | 224 mm | 87% | 1.8 m/s | 5 |
| 1984 ❄️ | 30.2°C | 26.7°C | 23.2°C | 31.9°C | 19.4°C | 220 mm | 87% | 1.8 m/s | 4.8 |
| 1983 | 32.7°C | 28.9°C | 25.2°C | 35.4°C | 24.2°C | 89 mm | 80% | 2.4 m/s | — |
| 1982 | 32.2°C | 28.2°C | 24.3°C | 34.4°C | 20.1°C | 149 mm | 81% | 1.8 m/s | — |
| 1981 | 30.6°C | 27.6°C | 24.6°C | 33.4°C | 22.1°C | 134 mm | 88% | 1.8 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 31.5°C with lows near 24.8°C (mean 28.2°C), based on 45 years of NASA POWER data.
September averages 187 mm of rainfall in Madhepura, a relatively wet time of year. The wettest on record was 588 mm in 2020.
The hottest September reached 37.8°C in 1992. The coldest dipped to 19°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.5°C. Daytime highs moved from 31.2°C to 31.2°C and overnight lows from 24.4°C to 25.4°C over the same span.
September is one of the warmer months of the year in Madhepura and a relatively wet time of year, so plan for around 31.5°C daytime highs and 24.8°C at night.
Not quite — September is the 7th coolest month in Madhepura, averaging 28.2°C.
For September in Madhepura, pack light, breathable clothing and sun protection, with typical highs of 31.5°C and lows of 24.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 84% — quite humid.
Average wind speed in September is 2 m/s. The windiest September on record averaged 2.8 m/s (1995).
The wettest September on record was 2020 with 588 mm. On average, September sees 187 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 Madhepura 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.
